PhD: Purcell enhanced mid-infrared emitters (M/F)
New
- FTC PhD student / Offer for thesis
- 36 month
- Doctorate
This offer is available in English version
This offer is open to people with a document recognizing their status as a disabled worker.
Offer at a glance
The Unit
Laboratoire de physique de l'ENS
Contract Type
FTC PhD student / Offer for thesis
Working hHours
Full Time
Workplace
75005 PARIS 05
Contract Duration
36 month
Date of Hire
01/10/2026
Remuneration
2300 € gross monthly
Apply Application Deadline : 09 July 2026 23:59
Job Description
Thesis Subject
The Quantum Physics and Devices group at LPENS is looking for a highly motivated student for a 3-year PhD project in the field of Quantum Optoelectronics. The aim of the project is the realisation of efficient nano-emitters at 10m wavelength that take advantage of Purcell effect in metallic nanocavities.
Purcell effect is the enhancement of spontaneous emission of a quantum system induced by its electromagnetic environment. In our device, the emitter is a quantum cascade structure, exploiting transitions among confined states in the conduction band of a semiconductor heterostructure. The electromagnetic environment of the quantum cascade structure is engineered with metallic antennas.
A quantum cascade structure is embedded in a metallic microcavity. The microcavities also operate as antennas, and are arranged into an array to generate a coherent collective mode. The whole structure is thus a two-dimensional lattice of microcavities, each of them embedding a quantum cascade structure. The very high aspect ratio enables the coupling between all the elements, thus the emergence of spatially non-local modes with almost infinite lifetimes known as bound states into the continuum (BIC). The realization of patch antenna device supporting a BIC mode will lead to giant Purcell factor, namely the ratio between the emitter's spontaneous emission rate with and without the cavity. This will result in an efficient mid-infrared light source for applications in gas spectroscopy and sensing.
Your Work Environment
The PhD candidate will have the opportunity to work in a dynamic scientific environment of research excellence in the heart of Paris. The student will be supported by the ANR ImPALA. The PhD candidate will carry out the nano-fabrication process at the Paris Center clean room consortium and will conduct electrical and optical characterization of the samples in the QUAD team at LPENS.
Constraints and risks
Risks associated with chemical products used in nanofabrication
Compensation and benefits
Compensation
2300 € gross monthly
Annual leave and RTT
44 jours
Remote Working practice and compensation
Pratique et indemnisation du TT
Transport
Prise en charge à 75% du coût et forfait mobilité durable jusqu’à 300€
About the offer
| Offer reference | UMR8023-BAPCHO-001 |
|---|---|
| CN Section(s) / Research Area | Condensed matter: electronic properties and structures |
About the CNRS
The CNRS is a major player in fundamental research on a global scale. The CNRS is the only French organization active in all scientific fields. Its unique position as a multi-specialist allows it to bring together different disciplines to address the most important challenges of the contemporary world, in connection with the actors of change.
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