Postdoc (scholarship) Silicon-integrated photonic-crystal surface-emitting lasers
KTH Department of Electrical Engineering
KTH Royal Institute of Technology in Stockholm has grown to become one of Europe’s leading technical and engineering universities, as well as a key center of intellectual talent and innovation. We are Sweden’s largest technical research and learning institution and home to students, researchers and faculty from around the world. Our research and education covers a wide area including natural sciences and all branches of engineering, as well as architecture, industrial management, urban planning, history and philosophy.
The work will be carried out at the KTH Department of Electrical Engineering and the KTH Electrum Laboratory, a state-of-the-art cleanroom facility for experimental semiconductor research and related micro/nanofabrication.
This project aims for the development of Photonic-Crystal Surface-Emitting Lasers (PCSELs) suitable for medium-to-long reach high-speed optical communication. PCSELs can produce large-area singlemode emission using a two-dimensional photonic crystal cavity where in-plane propagating waves are diffracted to the vertical direction. To this end, they have been designed with large-area emission apertures of hundreds of micrometers, allowing for a very high singlemode output power in the watt-regime. By contrast, decreasing device diameter leads to a reduction in lateral confinement and an associated increase in in-plane losses, and PCSELs have been restricted to device diameters of 100 µm or more which make them unsuitable for high-speed communication. In this project, we will investigate different designs and fabrication schemes for increased lateral confinement and reduced active area towards the 10-µm-diameter range. Using heterogeneous integration, small-area hybrid InP-Si PCSELs will be realized that potentially can extend the present short-wavelength and short reach vertical-cavity surface-emitting laser paradigm to the telecommunication wavelengths and distances.
To our disposal we have a well-equipped cleanroom facility (Electrum Laboratory) with ample of silicon and compound semiconductor processing tools, including metal-organic vapor-phase epitaxy (MOVPE), a newly installed micro-transfer print system, and a well-maintained CMOS processing line. The project will include all elements of the development, from device design and simulation, through epitaxial growth and device fabrication, to electro-optical characterization.
The successful applicant is expected to have a doctoral degree in physics, materials science, electrical engineering (towards photonics or microelectronics) or in a related subject. Experience from semiconductor epitaxy and micro/nano-fabrication, related materials characterization, photonic device design and characterization, or computational electromagnetics is highly regarded. The successful candidate should be highly motivated and curiosity-driven, have well-developed analytical and problem-solving skills, be able to work independently, cooperate with other project members and guide doctoral students in the group. The applicant should also have a strong publication record in international journals and conferences as well as good communication skills in spoken and written English.
The successful candidate must hold a doctoral degree or an equivalent foreign degree obtained within the last three years prior to the application deadline. If an applicant is currently completing a doctoral program, he or she must justify that a doctoral degree will be obtained before admission, preferably certified by a letter of support from main supervisor.
Apply to this scholarship by e-mail to firstname.lastname@example.org. You are the main responsible to ensure that your application is complete according to the ad. Your complete application must be received at KTH no later than 2021-09-20. Mark your application with reference number J-2021-1780.
The application must include the following documents:
- Curriculum vitae
- Cover letter (detailing both your previous scientific work experience and your interest in this position)
- Research statement (max 2 pages)
- Contact information for three references
Please observe that you apply for a scholarship, not an employment.
About the position/positions
Period: One year with possibility for one-year extension. Starting date upon agreement.
Amount of scholarship: 30.000 SEK/month
Location: KTH Electrum
Prof. Mattias Hammar, Department of Electrical Engineering, KTH, Email: email@example.com
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