The Future AI Infrastructure team at Microsoft Research Cambridge (UK) is exploring scalable, energy-efficient, and sustainable optical technologies that will shape the future of data center infrastructure. We are looking for a talented and enthusiastic PhD student to join us in spring/summer 2025 to contribute to topics related to integrated photonics design and modelling of active and passive components. You will be joining a multidisciplinary and highly collaborative team to work on creative and challenging problems aiming to push the technology boundaries and deliver transformative solutions. **Responsibilities** · Design and simulation of semiconductor active and/or passive devices. · Documenting and presenting your findings in technical documents and presentations. **Qualifications** **Required/Minimum Qualifications:** · Be enrolled in a PhD program in Photonics, Physics, Electronic Engineering, or related discipline. · Knowledge of the physics of semiconductor photonics devices. · Experience with integrated photonics design and simulation. · Experience with characterization of photonics devices in an optical lab. **Other Requirements:** · Interns are expected to be physically located in Cambridge, UK. **Preferred/Additional Qualifications:** · Experience with optical simulation tools (e.g. Lumerical, RSoft, MEEP, Tidy3D, Zemax). · Familiarity with free-space optics. · Ability to code in Python and familiarity with git. · Strong technical and scientific communication skills. Microsoft is an equal opportunity employer. Consistent with applicable law, all qualified applicants will receive consideration for employment without regard to age, ancestry, citizenship, color, family or medical care leave, gender identity or expression, genetic information, immigration status, marital status, medical condition, national origin, physical or mental disability, political affiliation, protected veteran or military status, race, ethnicity, religion, sex (including pregnancy), sexual orientation, or any other characteristic protected by applicable local laws, regulations and ordinances. If you need assistance and/or a reasonable accommodation due to a disability during the application process, read more about requesting accommodations (https://careers.microsoft.com/v2/global/en/accessibility.html) .