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Reference : UMR8023-YANTOD-022
Workplace : PARIS 05
Date of publication : Wednesday, June 9, 2021
Scientific Responsible name : Yanko Todorov
Type of Contract : PhD Student contract / Thesis offer
Contract Period : 36 months
Start date of the thesis : 1 September 2021
Proportion of work : Full time
Remuneration : 2 135,00 € gross monthly
Description of the thesis topic
The aim of the Ph.D project is to explore quantum infrared detectors operating in the ultra-strong light-matter coupling regime [1,2]. We will study devices where semiconductor quantum wells are integrated into optical resonators featuring deep sub-wavelength electromagnetic confinement . This geometry allows for ultra-low dark current and improved photo-generation rate. In such devices, we will explore how the presence of polariton states affects the electronic transport of the device. The Ph.D. student will actively participate in the conception and fabrication of the nano-detectors, starting from 3D numerical modeling, through clean-room processing and optical characterization of the structures. She/he will acquire not only strong scientific expertise in solid state devices and quantum optics, but also in nanofabrication techniques.
 A. F. Kockum, A. Miranowicz, S. De Liberato, S. Savasta and F. Nori, Nature Reviews Physics 1, 19–40 (2019).
 E. Orgiu, et al. Nature Materials 14, 1123–1129 (2015).
 M. Jeannin et al. ACS Photonics 6, (5) 1207-1215 (2019).
This thesis project is funded by the ERC UNIQUE project attributed to Yanko Todorov of the QUAD team of the Physics Laboratory of the Ecole Normale Supérieur, (LPENS). The objective of the project is to make accessible the quantum phenomena specific to the ultra-strong light-matter coupling regime in quantum semiconductor devices. The LPENS laboratory is located in the historic heart of the Latin Quarter in Paris, and has all the infrastructure necessary for the smooth running of the project, including a technological center. Complete information on the laboratory is available on the website https://www.lpens.ens.psl.eu/. Part of the nano-fabrication is planned in the clean room of the Grandes Moulin campus at the University of Paris (consortium of Paris-Center clean rooms).
Constraints and risks
Standard risks associated with clean room nanofabrication (training will be provided).
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