PhD project on epitaxial growth for application in nanophotonics and quantum technology

Research Center NanoPhoton - Center for Nanophotonics - at the Technical University of Denmark (DTU) invites applications for a PhD position on epitaxial growth of III-V semiconductor heterostructures for application in nanophotonics and quantum technology.

As part of the PhD project, students will spend 3-6 months abroad. The working environment in the research center is international and vibrant, emphasizing an open and relaxed atmosphere.

Responsibilities and qualifications

As a PhD student, you will be working closely with other members of the NanoPhoton team. You will be responsible for the epitaxial growth of III-V semiconductor heterostructures operating at the telecom wavelength range and nanofabrication.

More specifically, this will include:

  • Advancing self-assembled quantum dot (QD) growth methods and implementing new approaches to tailor the properties of individual QDs as well as array properties to address the requirements for a gain medium for nanophotonic devices.
  • Working in the state-of-the-art cleanroom facility on the fabrication of photonic nanocavity devices. This will include developing new methods for deterministic cavity fabrication and heterogeneous integration of III-V photonic nanodevices on a silicon platform.
  • Characterization of the resulting nanodevices.

Please refer to DTU.dk for the full details of the position.

 

 


 

Postdoc in Nano-Optoelectronics

At the Technical University of Denmark (DTU), we recently established a new research center, NanoPhoton – Center for Nanophotonics, to perform fundamental and applied research on a newly discovered class of semiconductor nanostructures, termed dielectric bowtie cavities. These cavities confine light to spots in the nanometer range and open several new and previously unimagined possibilities within quantum and information technology.

NanoPhoton is enabled by a major center grant from the Danish National Research Foundation and gathers leading experts within all these disciplines from several Departments at DTU. In addition to Nanophoton we have a supporting grant from the Swiss research foundation for collaboration between Paul Scherrer Institut (PSI) and IBM Zurich on photodetectors using their template assisted epitaxy (TASE) for replacing a silicon pattern with direct bandgap materials (III-V semiconductors). We are looking for a talented postdoc who can take the lead on this collaboration (LIVE-EDC) where we will be doing the design, some silicon processing and characterization. Main goal is detectors but within the same technology nanoLEDs and nanoLasers can also be made.

Responsibilities and qualifications

  • A significant task is the design of structures which are compatible with the technology (TASE and other processing). For this experience with optical design, preferentially topology optimization, is needed.
  • Depending on your background some cleanroom work could also be done.
  • The true benefit of nanoscale detectors is only realized if intimately integrated with (simple) electronics. Work towards that goal can also be part of the position.
  • Coordination within LIVE-EDC and Nanophoton.
  • Co-advising student projects and PhDs.

As a formal qualification, you must hold a PhD degree (or equivalent).

Please refer to DTU.dk for the full details of the position.

 

 


 

Experimental and theoretical PhD projects in Nanophotonics and Quantum Technology

Research Center NanoPhoton - Center for Nanophotonics at the Technical University of Denmark (DTU) invites applications for a number of open PhD positions within experimental and theoretical physics and engineering.

The purpose of NanoPhoton is to explore the phenomenon of sub-wavelength localization of light in semiconductor nanocavities. This leads to an extreme enhancement of the optical energy density and thereby opens new possibilities for studying light-matter interaction in hitherto unexplored regimes. Important applications include new devices for quantum technology, like lasers with reduced quantum noise and nonlinear devices working at the level of a few photons. Moreover, the extreme enhancement and small foot-print of the nanocavities offer the means to establish on-chip interfacing between electronics and photonics, which would lead to substantial energy-savings. Progress, however, is required in several research disciplines, including nanofabrication and device characterisation, and quantum theory of light-matter interaction in nanostructures.

Responsibilities and tasks

We now have openings for PhD projects focusing on the following topics:

  • Topic A: Design, fabrication, and characterization of nano-optoelectronic devices.  Fabrication including epitaxial semiconductor growth and processing will take place in the DTU Nanolab cleanroom.
  • Topic B: Design and fabrication of nanolasers exploiting extreme light confinement and Fano resonances, and experimental characterization of their dynamics and quantum noise. 
  • Topic C: Theory of nanoscale electromagnetism and quantum electrodynamics in optical cavities, with a special focus on the understanding of trapping and near-field effects.

All projects in NanoPhoton emphasize a close interaction between theoretical and experimental activities. While the research is of a fundamental nature, exploring and exploiting quantum effects in nanostructures, we pursue important societal long-term goals, in particular related to the reduction of energy consumption in information technology.

Please refer to DTU.dk for the full details of the position.

 

 



We are constantly on the look-out for talented and ambitious PhD students. If you have a Master's degree within a relevant field and a high GPA, feel free to get in touch.

 

Contact