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Here you will find information about all the submitted pictures. You will find the link to the voting at the bottom of the page. Voting will be possible until 11 June.
Doctoral hat of Antonie Bierling
Image: Felix HanspachDissertationstitel / Title of Dissertation:
From molecule to social interaction: development of a chemical-perceptual space of olfactory perception
Beschreibung / Description:
Dieser großartige Hut wurde mit viel Liebe gestaltet von meinen wunderbaren Kolleg:innen Yvonne Friedrich, Vanessa Nöring, Mathilde Gallistl, Tim Jesgarzewsky und Anja Monstadt.
Der Hut zeigt die zwei „Hauptachsen der Promotion“ der Doktorandin: eine „organisatorische“ von Dresden nach Jena und eine inhaltliche von der sensorischen Geruchswahrnehmung des Moleküls bis zur Verarbeitung von Bezeichnungen und Konstrukten, die unser Gehirn dieser Geruchserfahrung zuordnet. Damit spiegelt der Hut zum einen die zwei Affiliationen der Doktorandin – von der TU Dresden, wo sie bei Prof. Croy begonnen hat zu promovieren zur FSU Jena, wo sie ihre Promotion abgeschlossen hat. Jena würdig vertreten natürlich durch ein Modell des Jentowers, kleine Schildchen symbolisieren die Unis (TU Dresden, FSU Jena) und die beteiligten Arbeitsgruppen. Zudem kommt in Dresden noch eine kleine Hummel auf den Hut – eine liebevolle Anspielung an Prof. Thomas Hummel, einer der wichtigsten Wissenschaftler im Bereich der Geruchsforschung, der auch in beiden Forschungsprojekten, die zu dieser Promotion geführt haben involviert war und ein wichtiger Mentor im Prozess war. Drei persönliche Anekdoten zeigen die Hobbys und Macken der Doktorandin – ihre beiden Katzen, einen kleinen Fotoapparat als Repräsentation des großen Hobbys Fotografie und ihre (übertriebene?) Vorliebe zum Pastakochen (ob in Jena oder Dresden).
Auf der inhaltliche Achse ist in der Mitte eine modellierte menschliche Nase. Auf der rechten unteren Ecke veranschaulicht sind liebevoll modellierte zwei wichtige Moleküle, die in einer der zentralen Studien auf ihre Wahrnehmung hin untersucht wurden. Die gestapelten Döschen sind originale Döschen aus der Studie – so wurden die Gerüche den Probandinnen und Probanden dargeboten. Insgesamt wurden für die Studie etwa 10000 solcher Döschen produziert – in Handarbeit im Labor. Auf der oberen linke Ecke sind in Wortwolken symbolisiert die Wahrnehmungsergebnisse der Gerüche. Wie sich in der Promotion zeigte, unterscheiden sich Menschen deutlich in ihrer Wahrnehmung und Beschreibung von Gerüchen, das hat diverse Gründe, von anatomischen Unterschieden über Lernerfahrung bis zur aktuellen körperlichen Verfassung. Die beiden Wolken zeigen Ergebnisse für die Molekülstudie, das T-Shirt einen Ausschnitt der Beschreibungen zu Körpergerüchen aus einer weiteren Studie, die Teil dieser Promotion ist.
Alle drei Titel der Publikationen haben natürlich auch Platz auf dem Hut gefunden. Als Quaste fungieren mehrere Schlüsselbänder des Projektes Perceptronics, das einen Teil der Forschung finanziert hat. Auf der Hutkrempe finden sich Bilder aus der Promotionszeit, u.a. von Projektmeetings von Perceptronics und dem zweiten Projekt SMELLODI, sowie Rekrutierungsmaterial, das im Laufe der Promotion verwendet wurde. Verrückterweise passt der Hut nicht nur perfekt auf den Kopf der Doktorandin, sondern auch auf eine von ihr vor mehr als 10 Jahren gestaltete Kopfplastik, wo der Hut nun ein dauerhaftes „Zuhause“ gefunden hat.
Doctoral hat of Constanze Schultz
Image: Constanze SchultzDissertationstitel / Title of Dissertation:
Raman Spectroscopy of Molecules in Complex Biological Environments: From Label-Free Biomolecular Signatures to Silent Region Tagging of Small Molecules
Beschreibung / Description:
Diesen wunderschönen Doktorhut hat mir meine Arbeitsgruppe „Molekulare Bildgebung“ gebastelt, bei denen ich mich auf diesem Weg noch einmal ganz herzlich bedanken möchte!
Kernelement des Hutes ist ein Höhenprofil des Saaletales, auf dem mein Promotionsweg am IPHT und IPC als Wanderroute mit Stempelstellen dargestellt ist. Während meiner Promotionszeit war ich viel mit meinem Touringen-Stempelheft auf Entdeckungstour in Thüringen. Daher ist es klar, dass es auch für den Weg meiner Promotion ein solches Heft (mit vielen Insiderinfromationen) geben muss!
Doctoral hat of Friedrich Ehinger
Image: Friedrich EhingerDissertationstitel / Title of Dissertation:
Reactive 3-Furylalanine-Containing Cyclopeptides: Biosynthesis, Discovery, and Pathway Engineering
Beschreibung / Description
Curious about nature – this very well characterizes my hat and my PhD time in general. The hat not only includes chemical structures of natural products I identified and investigated alongside an anaerobic tent to study oxygen-sensitive enzymes, but also a wonderful ensemble of canoe, tent, trees, and birds that represent my passion for outdoor activities.
Doctoral hat of Jonas Ziemer
Image: Jonas ZiemerDissertationstitel / Title of Dissertation:
Advancing Dam Monitoring: Integrating MT-InSAR and In Situ Data for the Analysis and Prediction of
Dam Deformations
Beschreibung / Description:
Dieser wunderschöne, detailverliebte Hut wurde mir anlässlich der Verteidigung meiner Doktorarbeit Ende März dieses Jahres vom Lehrstuhl für Fernerkundung übergeben. Der Hut zeigt eine Staumauer mit Staubecken und Bewaldung um das Bauwerk herum. Die Bewegung der Talsperre wird über den Jahresverlauf mit Hilfe des Radar-Satelliten „Sentinel-1“ der Europäischen Weltraumorganisation (ESA) aus dem All beobachtet. Anhand der vom Satelliten ausgesendeten Signale können Bewegungen der Staumauer an bestimmten Punkten in Millimetergenauigkeit erkannt werden. Diese Punkte liegen auf der Mauerkrone und sind entsprechend ihrer Bewegung in Rot oder Grün dargestellt. Der Fuß des Hutes ist mit zahlreichen Bildern aus meiner Arbeit an der Dissertation versehen (z.B. von Konferenzen, Feldarbeiten oder aus meinen Publikationen), die im Laufe der letzten dreieinhalb Jahre entstanden sind.
Doctoral hat of Josefine Schroeder
Image: Josefine SchroederDissertationstitel / Title of Dissertation:
Delivery platforms for antiviral and anti-inflammatory substances during influenza virus infections
Beschreibung / Description:
Dieser Doktorhut ist mehr als nur eine Kopfbedeckung, er ist ein Stadion. Ein leuchtend buntes, lebendiges Stadion, in dem sich eine ganz besondere Reise abgespielt hat: meine Promotion. Unter dem Motto „Josi’s Doktor-Olympiade“ haben sich meine lieben Kolleg*innen etwas ganz Besonderes einfallen lassen. Der Hut erzählt von Ausdauer, Ehrgeiz und der Freude am Dranbleiben. Denn eine Promotion ist kein Sprint, sie ist ein Marathon. Und manchmal auch ein Hürdenlauf. Oder ein Weitwurf. Oder alles gleichzeitig.
Schon am Start beginnt der Tag, wie so oft in den letzten Jahren: auf zwei Rädern. Das Fahrrad steht für meinen täglichen Weg zum Beutenberg Campus, bei Sonne, Wind und Regen. Es ist der Auftakt jeder Etappe, der erste Tritt in die Pedale eines langen, oft unvorhersehbaren Rennens. Doch kaum im „Stadion“ angekommen, wartet schon die erste Herausforderung: der Virus-Hürdenlauf. Die kleinen, wuscheligen Figuren stehen für Influenza-Viren, meine ständigen Begleiter im Labor. Gleich daneben folgt die nächste Disziplin: der Nanopartikel-Weitwurf. Hier werden die winzig kleinen Teilchen meiner Forschung zu sportlichen Wettkämpfern und symbolisieren den Versuch, neue Erkenntnisse zu gewinnen und die Wissenschaft ein kleines Stück weiter voranzubringen. Und dann ist da noch die vielleicht längste Strecke von allen: der Analysen-Marathon. Stunden, Tage, Wochen, Monate, Jahre voller Experimente und Auswertungen, eine Disziplin, die scheinbar keine Ziellinie kennt, bis sie plötzlich vor einem auftaucht. Am Ende dieser Strecke stehe ich selbst bei der Verteidigung meiner Arbeit. Mit ihr erreiche ich das lang ersehnte Ziel: Dr. 2026. Zwischen all den sportlichen Stationen verstecken sich kleine persönliche Details: eine farbenfrohe Quaste, Armbänder, Erinnerungen und Insider. Und irgendwo mittendrin ein kleiner Affe mit einer Brille, ein liebevolles Easter Egg, dessen Geschichte wohl nur Eingeweihte ganz verstehen.
Doctoral hat of Katsuya Tanaka
Image: Katsuya TanakaDissertationstitel / Title of Dissertation:
Mie-Resonant Silicon Metasurfaces for Advanced Light Shaping
Beschreibung / Description:
This hat features four main components, each representing an important part of my life and work:
Doctoral hat of Kerstin Unger
Image: Kerstin UngerDissertationstitel / Title of Dissertation:
The role of the plant specialized metabolites glucosinolates and isothiocyanates in microbial interactions and leaf colonization
Beschreibung / Description:
My colleagues and friends have crafted a beautiful PhD hat for me that shows several of my personal interests and some work- and project-related items. The overall design is very nature-based since I like to be outdoors.
I love to go hiking which is depicted by the hills around Jena, the Fuchsturm, crocheted trees and the finish line of the hiking competition “Saalehorizontale”. I go skating and kayaking, shown by skates and a boat on the Saale. I like to go mushroom hunting - watch out for all the edible and non-edible 3D-printed little mushrooms everywhere on the hat! I used to grow vegetables in a shared garden at FlussLand together with friends. Our field was named “Gemüse mit Genen” - have a look on how detailed they crafted all the lovely vegetables!
It seems like my colleagues have always been very impressed by my baking and cooking skills, so they included a quiche and cupcakes which I also regularly brought to share in the group. My Bachelor student Rebecca perpetuated herself and myself in a petri dish (usually we grow bacteria in these petri dishes) that says “students grow best under good conditions” - We had fun developing the project together and it was my pleasure to mentor her! On the sides of the hat my colleagues depicted how organized I am: you see a calendar filled with appointments and an extensive to-do-list, and they have collected the logos of every single conference that I attended in the last years.
My two favorite bacteria (yellow Plantibacter and grey Pseudomonas) are hanging from the sides of the hat. I generated a lot of bacterial growth curves in my project; and they crafted one plot with these curves using pipe cleaners. In the end, of course, we cannot miss saxA. I studied the role of this gene of Pseudomonas in interaction with plants and microbes: You can see “saxA” written on a shield because it protects Pseudomonas from plant defense compounds and helps other microbes to survive.
Doctoral hat of Matteo Calvarese
Image: Matteo CalvareseTitel der Dissertation / Title of Dissertation:
Toward cancer theranostics via multimodal nonlinear endomicroscopy, microspectroscopy and femtosecond laser ablation
Beschreibung / Description:
This PhD hat is a colorful representation of the years spent between research, experiments, coffee breaks, and survival snacks. Every object on it reflects a different part of the PhD experience, combining scientific work with personal identity and everyday rituals.
The illuminated racetracks and the characters from the movie Cars refer to the main imaging technique used during the PhD: CARS (Coherent Anti-Stokes Raman Scattering). The different colored tracks and glowing lights symbolize broadband CARS, where many wavelengths are used and different spectral components are combined to reveal complex information hidden within biological samples.
At the center stands the unmistakable Italian hand gesture, surrounded by a moka pot, espresso cup, coffee beans, and Nutella. These elements represent the italian roots and the daily essentials during the intense research days. The thread hanging from the hat is made of penne pasta, another reference to the italian culture.
At the back, the endoscope represents the actual device worked on throughout the research project, mounted on a laser-engraved transparent substrate featuring a picture of me dressed in ancient Roman clothes (from a conference dinner in Rome).
The photographs around the base capture some of the people, conferences and memories that shaped the PhD beyond the experiments themselves.
A big thank you goes to the colleagues from the Molecular Imaging group at Leibniz IPHT, who made a great effort in building a great hat.
Doctoral hat of Maximilian Schaal
Image: Maximilian SchaalDissertationstitel / Title of Dissertation:
Decoupling, Integer Charge Transfer, and Surface Reactions of Organic Molecules on 2D Materials
Beschreibung / Description:
Dieser fantastische Doktorhut wurde von meinen Arbeitskolleginnen und -kollegen angefertigt. Sein Hauptbestandteil ist ein schematischer Aufbau zur Messung der differentielle Reflexionsspektroskopie (DRS). Mit dieser Methode habe ich in meiner Promotion die Schichtdicke und die optische Absorption meiner hergestellten organischen Dünnschichten bestimmt. Der Aufbau nutzt eine rote und eine grüne Laserdiode als Lichtquellen. Die Laserstrahlen müssen zunächst durch Spiegel auf ein Molekül an der Decke des Aufbaus und anschließend auf einen Phototransistor gelenkt werden. Bei erfolgreicher Justierung erscheint das Absorptionsspektrum des organischen Moleküls auf einem kleinen OLED-Display. Die Justierung des DRS-Aufbaus kann schweißtreibend sein und Nerven kostet, deshalb darf man sich nach der optischen Charakterisierung einen Schluck Kräuterlikör gönnen. Hierfür bietet der Hut eine Schaukel, die das Befüllen des Glases vereinfacht.
Da das Einhorn mein Lieblingsfabeltier ist, darf es auf dem Hut natürlich nicht fehlen. So wird das OLED-Display von einem kleinen Einhorn-Plüschtier gehalten und die beigefügte „Laserschutz“-Brille ist im trendigen Herzchen-Einhorn-Design gestaltet. Die japanische Flagge auf dem DRS-Aufbau symbolisiert meine Affinität zu Japan und zur japanischen Kultur. Während meiner Promotion hatte ich die großartige Möglichkeit, einen Forschungsaufenthalt in Japan zu absolvieren. Der Drache ist ein aus beweglichen Teilen bestehendes Spielzeug, das jedoch in einem Stück mit dem 3D-Drucker hergestellt wurde.
Doctoral hat of Maximilian Weissflog
Image: Maximilian WeissflogDissertationstitel / Title of Dissertation:
Photon-Pair Generation in Nonlinear Nanostructures
Beschreibung / Description:
Doing a PhD is not a piece of a cake… or is it? It depends from which angle you look at it, same as for my PhD hat. This hat my amazing colleagues made for me is half a giant cake and half a flatworld version of my research journey. Apparently my regular coffee+cake afternoon break left an impression. I was lucky enough that my PhD in optics got me traveling to collaborating labs in France, USA and Australia… which is very literary “down-under” on my hat. Fortunately, this flat world has climbing holds to safely get around the edge to Australia. For whoever prefers online meetings, we also have an intercontinental optical fiber cable (in yellow) And if you have a mini-version of France, of course the Eiffel tower can’t be missing. Which here, however, is a little bit skewed… exactly resembling the key figure from a joint paper with a Parisien lab shown behind it. I swear this was unintended at the time :) The ladder shaped, transparent block before the tower is a very magnified (but pretty accurate) model of one of the devices I developed during the PhD. But of course it’s not all about work: In the first floor of the cake the karaoke mic is already prepared…
What’s left for me to say is a HUGE thanks to my colleagues for the past years in the nano- & quantum group <3 !
Doctoral hat of Melike Bayar
Image: Melike BayarDissertationstitel / Title of Dissertation:
Effects of arsenic treatment on Aß aggregation and Aß toxicity in the C. elegans model of Alzheimer's disease
Beschreibung / Description:
This hat was prepared by my colleagues and friends, and it represents both my PhD journey and parts of my personal life. It includes many references to my project, my daily lab work, my interests, hobbies, and the memories I collected throughout these years.
The first thing you notice is my colorful name and title. The little crowns are a reference to my name, since my name means “queen” in Turkish. The sticker is one that I used very often while chatting, which is why my friends included it on the hat.
The Turkish flag represents my roots and where I come from, while the German flag symbolizes the country where I completed my PhD and have been living for the past nine years.
One of the biggest elements on the hat is the green microscope, which reflects the fluorescence microscopy work I performed throughout my PhD. Underneath, there are some C. elegans worms in Petri dishes, representing the model organism I used in my research. The different worm strains shown on the hat refer to the various transgenic lines expressing aggregating proteins with fluorescent tags.
There are also three books with special meanings. The yellow book, titled The Diary of Alois Alzheimer, refers to my presentations, where I often introduced the history of Alzheimer’s disease and spoke about Alois Alzheimer, the first person to describe the disease. The blue WormBook represents the well-known online resource we frequently use in the C. elegans field, and it includes the famous life cycle image of the worm. The green book labeled B1 Deutsch symbolizes an important personal achievement: passing my German B1 exam this year.
The many labeled vials and warning signs represent the heavy metals I worked with, such as arsenic and lead. The yellow waste container is another reference to this work, since heavy metal waste must be disposed of separately and carefully according to laboratory safety regulations.
The little cat represents my family’s cat, how to forget about her! :) The coffee mug reflects an essential part of everyday PhD life, while the PCR tubes symbolize the countless PCRs and qPCRs I performed during my project. The chocolates simply represent my love for chocolate.
Another meaningful detail is the small camera, which even flashes. :D It reflects my passion for photography, and the film strip coming out of it includes a smiling picture of me. The many photos placed around the hat represent valuable memories, trips, and special moments shared with people I deeply care about.
Finally, the small island represents my love for summer holidays and seaside destinations. It is also a reminder of our Costa Rica trip with my close friends.
Doctoral hat of Nico Schneider
Image: Nico SchneiderFoto eingereicht von / Picture handed in by:
Dr. Katja Brenk-Franz
Eigentümerin des Hutes / Owner of the hat:
Nico Schneider
Dissertationstitel / Title of Dissertation:
Evaluation eines Konzeptes zur Verbesserung der Patienteninformation und –kommunikation und der Kompetenzförderung in der Onkologie (PIKKO)
Beschreibung / Description:
Dieser Promotionshut zeigt den Doktoranden in seiner natürlichen Umgebung: zwischen Daten, Deadlines und diversen Paralleluniversen. Inspiriert von Star Trek und Star Wars bewegt er sich souverän zwischen Wissenschaft und Utopie. Die Figuren stehen für interdisziplinäre Teams (und gelegentliche innere Dialoge), während Technik, Bücher und Notizen den täglichen Kampf mit Literatur, Statistik und Koffein symbolisieren. Der dezente Hauch von Johnny Cash erinnert daran, dass auch dunklere Phasen dazugehören („I walk the line“ zwischen Motivation und Verzweiflung), während „Das Wars - Promotion“ klarstellt: Der Weg war episch, leicht dramatisch und definitiv preisverdächtig.
Fazit: Ein Hut, der uns allen zeigt, gute Projekte sind keine Science-Fiction, sondern harte Arbeit… mit gelegentlicher Unterstützung der Macht.
Doctoral hat of Ralf Minor
Image: Clara PönickeFoto eingereicht von / Picture handed in by:
Clara Pönicke
Eigentümerin des Huts / Owner of the hat:
Ralf Minor
Dissertationstitel / Title of Dissertation:
Differences in the Empirical Conceptualization and Theoretical Explanation of Gender Differences in STEM Pathways
Beschreibung / Description:
The hat illustrates gender differentiated life paths in educational and occupational careers. The young woman on the Jentower is facing the decision of whether to choose a STEM or non-STEM career. While in the literature the metaphor of a disproportionate linear decline (leaky pipeline) of women is common, the dissertation highlights conceptual shortcomings examining the volatile pathways. Ralf (the young man in the knitted sweater), has done research on these pathways accompanied by his little furry assistant Puck – he’s a poodle and also a statistics pro, or so we like to think. Ralf was also heavily powered by overdoses of caffeine and sugar.
Doctoral hat of Sarah Bühler
Image: Sarah BühlerDissertationstitel / Title of Dissertation:
Role of Spred1 and endocytosis in the regulation of the Ras/Erk pathway
Beschreibung / Description:
Pink Doctorate Hat with pictures on the bottom as well as the pink glittery writing “Sarah just did it <3”. Additionally some paper garlands in pastel pink, purple and yellow are added around the top of the hat along the traditional red cord for the medical faculty. On top of the hat are flowers, a gaming controller, my cat, a stack of books and coffee along with a microscope and some cell dishes with either googly eyes or pictures of confocally taken pictures of fluorescent cells as well as some protein models made out of pipe cleaners and labels for “Ras, Spred1, SNX3”. A picture of me looking for Spred1 and Ras as well as my husband cooking for me and my doctor father pointing at me and saying to “Just ask Sarah!”.
Doctoral hat of Sayali Hanamghar
Image: Sayali HanamgharDissertationstitel / Title of Dissertation:
Strategies for enhancing cytochrome P450-dependent light-driven catalysis and sustainable pigment production in cyanobacteria
Beschreibung / Description:
Let me navigate you through my PhD journey, PhD hat or should I say, describe me?
When people look at my PhD hat, they see colours, tiny sculptures, glitter, paper, and clay. But for me, this hat is much more than decoration, it is the story of my entire PhD journey stitched, painted, and sculpted into one piece of art. Every corner of it carries a memory, a struggle, a victory, a hobby, or a person who made these years unforgettable.
At the heart of my PhD was cyanobacteria, the tiny blue-green algae that became the centre of my scientific world. My work focused on expressing enzymes from plants such as Sorghum and Beetroot inside cyanobacteria. On the hat, these enzymes appear as beautiful blue 3D structures traveling toward the thylakoid membrane, represented by the green clay strings. To many, it may look like abstract art, but to me it represents years of experiments, failed attempts, exciting results, and endless hours in the lab. Some projects led to the production of glowing orange pigments, while others resulted in yellow pigments being secreted by the algae. Looking back, my PhD itself feels like a spectrum of colours; blue, green, orange, and bright yellow, which is why the base of the hat shines so vibrantly.
Right at the centre sits one of the most important symbols of all: the pipette. Every scientist knows that behind every successful experiment is a pipette that has practically become an extension of your hand. It may seem simple, but countless days and nights of my PhD revolved around this tiny laboratory tool. So naturally, it deserved the centre stage on my hat.
But my PhD was never only about science. One of the most meaningful pieces on the hat is the boat filled with crocheted cyanobacterial cells, proudly rowed by me. It combines my passion for research with my love for cutter rowing at the Jenaer Ruder and Sea Sports Club on the River Saale. Rowing taught me teamwork, resilience, and balance, qualities that also define research.
Turning the hat around reveals another deeply personal story, three paper sheets hanging delicately above a Pothos plant. These papers symbolize the three research publications that emerged from my PhD work. In my office, there is a Pothos plant hanging right above my head, and somehow its vines constantly entangle into my curls while I worked. It became such a familiar and comforting part of my everyday life that my friends decided it simply had to be included on the hat.
Another proud moment captured on the hat is my victory at the Three Minute Thesis Competition 2025 in Jena, where I won both the Jury and Audience awards. Communicating years of complex scientific work in just three minutes felt almost impossible, yet it became one of the most rewarding experiences of my PhD. In Germany, celebrations almost always involve cake, wine, or beer. My dear friend often joked that she was not talented at baking cakes, so instead crafted a perfect little clay cake for my hat. Somehow, that handmade cake feels even more special than a real one ever could.
The hat also carries a piece of my home, Pune, India. The orange-golden drum represents the Ganesh festival processions where I proudly played this traditional drum called Dhol. Living in Germany made me miss those celebrations deeply, so my friends thoughtfully included the dhol on my hat as a reminder of home.
Then comes the funniest part, the KFC bucket and trolley bag. My PhD journey involved a lot of travel, and my friends knew very well that no trip of mine was complete without KFC. So naturally, they immortalized my favourite comfort food on the hat too.
Among all these colourful symbols, the most emotional elements are the photographs of my parents and my wedding picture. During my PhD, my partner was in the UK, I was in Germany, and our families were in India. Despite the distance and time zones, their love and support helped me through everything. My parents, especially, have supported me since childhood and gave me the courage to pursue my dreams far from home.
Perhaps that is what this entire hat truly represents. It is not just a summary of experiments, papers, awards, or achievements. It is a celebration of people, memories, growth, homesickness, laughter, friendship, science, hobbies, travel, culture, and love.
As an international student coming from India to pursue a PhD in Germany, the journey was never easy. There were moments of uncertainty, exhaustion, and self-doubt. But there was also immense support. I am deeply grateful to the State of Thuringia for funding my PhD and giving me this opportunity. I am equally thankful to my supervisor, colleagues, friends, and family, who stood beside me through every high and low.
What makes this hat truly priceless is that it was crafted by those very people, the friends and fellow researchers who witnessed this journey closely. They transformed years of memories into art. And every time I look at this hat, I do not just see decorations. I see myself and my colourful PhD journey.
Hatts Off!!!!
Doctoral hat of Sebastian Klimmer
Image: Nele TornowFoto eingereicht von / Picture handed in by:
Nele Tornow
Eigentümerin des Hutes / Owner of the hat:
Sebastian Klimmer
Dissertationstitel / Title of Dissertation:
Engineering Excitonic Resonances in Light-Matter Interactions in 2D Transition Metal Dichalcogenides
Beschreibung / Description:
Dieser Hut für unseren lieben Freund und Kollegen beinhaltet quasi alles, was ihn für uns ausmacht. Wichtig: als waschechter Bayer natürlich nur mit Hofbräu-Maß als Basis und Bayern-Flagge oben drauf. Sein mindestens zweitliebstes Getränk finden wir oben in der Mitte; dargestellt mit Kaffeebohnen ist der (fast) tägliche Morgenkaffee im Rossi. Über’s Pylonieren schweigen wir lieber.
Etwas fachliches musste natürlich auch drauf: wir finden ein TMD um die Stempelkarte herum angeordnet sowie Laserpulse in rot als Anregung und blau als Emission. Hinzu kommt Elsa (die Disney-Leidenschaft ist groß), die winkend (wave) mit Probe an der Hand in einer Cavity aus zwei Spiegeln steht, also quasi eine standing-wave. Als langjähriger DoKDoK-Organisator und auch Conference-Chair, darf die DoKDoK-Glühbirne auf dem Stuhl nicht fehlen. Als tierische Bewohner finden wir mehrfach Dackel (seinen liebsten Mitbewohni), sein Lieblingstier den roten Panda und selbstverständlich eine gehäkelte Eule entsprechend unserem Gruppen-Logo.
Einen Teil seiner PhD-Zeit hat er in Australien verbracht, was wir auch durch den dort eigens gekauften und von uns “ausgeliehenen” Boomerang erkennen können. Und wer entdeckt das dargestellte Fitti-Hobby?
Doctoral hat of Tasiyiwa Priscialla Muumbe
Image: Tasiyiwa Priscialla MuumbeDissertationstitel / Title of Dissertation:
Terrestrial Laser Scanning (TLS) in South African Ecosystems
Beschreibung / Description:
The hat summarises the key work completed during my five-year dissertation. This work focused on scanning individual trees with a Riegl VZ-1000 Terrestrial Laser Scanner (TLS) in Kruger National Park, South Africa-a representative savanna ecosystem.
Doctoral hat of Tobias Bucher
Image: Tobias BucherDissertationstitel / Title of Dissertation:
Light-emitting nanostructures for control of valley-selective exciton emission
Beschreibung des Huts / Description of the hat:
This beautiful piece of art, created by my colleagues, brings together my personal interests both within and beyond my scientific work.
At first glance, the blue cover on top of the hat evokes the image of a wide ocean, symbolizing the adventurous and sometimes unpredictable journey of a PhD. Floating on this blue “sea” are several objects related to my research, almost like small rafts carrying pieces of scientific knowledge. A miniature cryostation and two PhD-related nanostructures represent the experimental world that shaped much of my doctoral work.
On closer inspection, however, the ocean reveals another layer: it is also a Billard-Karambol table, complete with the three characteristic billiard balls in red, yellow, and white, as well as a cue stick. This playful crossover reflects something very important to me: the balance between scientific dedication and the hobbies, friendships, and moments of joy that helped me along the way.
Adding a personal and local touch, the hat also features a map of the city of Jena, arranged like a coastline bordering the blue field. The landscape is designed in a charming Middle-earth-inspired style, carefully decorated with small mountains and houses, creating the impression of a tiny fantasy world. In this way, the hat not only refers to the place where my PhD took shape but also turns it into a world of adventure and imagination.
Altogether, this hat tells more than the story of a scientific project. It captures the journey, the people, the shared moments, and the friendships that accompanied me throughout my PhD. I am deeply grateful to everyone who walked this path with me, and especially to the many hands and creative minds that helped bring this wonderful hat to life.
Doctoral hat of Tobias Gäbler
Image: Tobias GäblerDissertationstitel / Title of Dissertation:
Fundamental and Applied Aspects of Fluorescence Microscopy with Entangled Light
Beschreibung des Huts / Description of the hat:
The hat designed by my colleagues from Fraunhofer IOF combines several aspects of my life during my PhD time. First of all, my PhD supervisor Prof. Tünnermann with his signature response on social media. Next, our fridge of our kitchenette is indicated, which I used to store my fluorescence samples between the food of my colleagues (of course, carefully and securely packaged) due to the lack of a sample freezer. During my PhD time, I also expressed a business idea to buy as many garages as possible to rent them in the scope of electric car charging. This is was illustrated together with walls full of tools I lend a lot to my friends and colleagues. Several pictures, like the one with the dinos are illustrating my small family of my wife, my son born during my PhD time and me. The Jablonski diagram, sculpted from modeling clay, depict on of my research topics: Fluorescence emission by two-photon absorption of entangled light. In the center, my close colleagues of the Quantum Enhanced Imaging group at Fraunhofer IOF are shown as bowling pin sitting around my journal publications. These pin, which can be found also on the cord, represent my favorite hobby: traditional nine-pin bowling.
On the bottom are led stripes, which were part of the game after my PhD defense: Two opposite light spots are running on these stripes. To symbolize the coincidence measurement of two entangled light photons, a button must be press when both light spots are coming together. This must be done several rounds, in which the spots become faster and, thus, the game more difficult. Every badly timed keystroke leads to a reset of the game. If the game is successfully passed, the green liquid on top of the hat will be illuminated, symbolizing the emission of fluorescence light using entangled light: the primary goal of my PhD work.