Thomas Christensen

At DTU Electro, the Quantum and Nanophotonics Section is recruiting a postdoctoral researcher for the program Symmetry-guided discovery of topological photonics . The project sits at the intersection of theoretical physics, mathematics, and computational science, with a strong focus on how symmetry can be used to uncover and classify new forms of photonic topology. The successful candidate will work on theory and computation for topological photonics, helping develop concepts, computational tools, and theoretical frameworks that deepen understanding of light-matter interactions. The advert highlights several possible directions, including topological photonic crystals and metamaterials, non-Hermitian and time-dependent photonic systems, space-time and magnetic symmetries, topology in disordered or non-crystalline environments, and new computational methods for exploring photonic topology. The position is part of a collaborative research environment at DTU Electro, a large department with broad expertise in electrical and photonics engineering. The postdoc will be supervised by Assoc. Prof. Thomas Christensen and is expected to interact with his peer network in the US, Europe, and Asia. The research setting is international and intellectually active, with opportunities to contribute to both fundamental science and future photonic technologies. The project is described as flexible, meaning the exact direction will be shaped by shared interests, expertise, and scientific aspirations. The advert also notes that work may support future experimental demonstrations through collaborations with leading researchers in Denmark and internationally.

The Quantum and Nanophotonics section at the Technical University of Denmark (DTU Electro) invites applications for a fully funded PhD position in the program ‘Symmetry-guided discovery of topological photonics’, led by Associate Professor Thomas Christensen. This research is supported by the Villum Young Investigator program and aims to advance the theoretical frontiers of photonics by exploring novel topological phenomena through the intersection of topological band theory, symmetry analysis, and photonics. As a PhD student, you will engage in theoretical and computational research focused on topological photonics and nanophotonics. Your responsibilities will include numerical computation and theoretical analysis of photonic properties in candidate designs, developing effective models to deepen theoretical understanding, and creating code and frameworks to address new topological phenomena. You will also have the opportunity to propose and evaluate designs for experimental proof-of-principle demonstrations, collaborating with both local and international experimental groups. The position is embedded in DTU Electro, a globally recognized technical university with a strong reputation for research, education, and innovation. DTU Electro hosts 350 employees and conducts research in areas such as nanophotonics, lasers, quantum photonics, optical sensors, LEDs, photovoltaics, ultra-high speed optical transmission systems, and bio-photonics. The university fosters an inclusive and diverse environment, supporting academic freedom and collegial respect. Applicants must hold a two-year master's degree (120 ECTS points) or an equivalent qualification. The ideal candidate will have a background in photonics and condensed-matter physics, a passion for theoretical and computational physics, and a structured, mathematical mindset. Prior research experience in photonic crystals, band topology, or symmetry analysis is advantageous. Only candidates with an excellent GPA or a proven research track record will be considered. Proficiency in English is required, and all application materials must be submitted in English. The PhD program includes coursework, teaching participation, an external research stay, and dissemination of research through publications. The position is supervised by Associate Professor Thomas Christensen, with assessment by Prof. Jesper Mørk. The successful candidate will be expected to interact with and visit international collaborators. Funding is provided by the Villum Young Investigator program, with salary and appointment terms based on the collective agreement with the Danish Confederation of Professional Associations. The employment period is three years, with a flexible starting date by mutual agreement. To apply, submit your complete online application by 1 February 2026 via the provided application link. Attach all required materials in English as a single PDF file, including a cover letter, CV, grade transcripts, diplomas, references, and a writing sample. Applications may be assessed on a rolling basis, and selected candidates will be invited for interviews. All interested candidates, regardless of background, are encouraged to apply. For further information, contact Associate Professor Thomas Christensen at [email protected]. Additional details about DTU Electro and the Quantum and Nanophotonics Section are available on the DTU website. International applicants can find resources on relocating to Denmark and joining DTU, including monthly seminars addressing practical matters for PhD students.