Development of a mid-IR degenerate pump-probe setup (M/F)

Descrizione

Development of a mid-IR degenerate pump-probe setup (M/F) Sintesi in italiano (traduzione automatica): L'Università Paris Saclay e il CNRS offrono un'opportunità per un incarico post-dottorale di due anni nel Centro per le Nanoscienze e le Nanotecnologie (C2N) in Francia. Il candidato si unirà al team di dispositivi quantistici Mid-IR/THz, specializzato nello sviluppo di dispositivi optoelettronici innovativi. Le mansioni principali includono la progettazione e l'implementazione di un setup di pump-probe degenerato operante nel mid-IR, la gestione di un sistema di acquisizione dati e il controllo di un sistema di ritardo ottico. È richiesta una laurea di dottorato in fisica, ingegneria o discipline affini. La posizione è situata a Palaiseau, nel campus di Paris Saclay, e il salario è negoziabile in base all'esperienza del candidato. We have an opening for a two-year (initially) post-doctoral appointment at University Paris Saclay (France) and CNRS, with the Centre for Nanosciences and Nanotechnologies (C2N). You will integrate the Mid-IR /THz Quantum Devices Team, specialized in the development of novel optoelectronic devices exploiting quantum electrodynamics effects at mid-infrared wavelengths [1] [2]. Located south of Paris, University Paris Saclay extends across a vast local area and is ranked as France's top university. The salary level can be negotiated depending on the candidate experience. The project is supported by an ERC Advanced Grant (project SMART-QDEV). The goal of this project is to develop a degenerate pump-probe setup operating in the mid-IR, based on a OPA (optical parametric amplifier) already available in the lab, tunable from 0.6 to 12 um. 1. M. Hakl, Q. Lin, S. Lepillet, M. Billet, J.-F. Lampin, S. Pirotta, R. Colombelli, W. Wan, J. C. Cao, H. Li, E. Peytavit, and S. Barbieri, "Ultrafast Quantum-Well Photodetectors Operating at 10 μm with a Flat Frequency Response up to 70 GHz at Room Temperature," ACS Photonics 8, 464–471 (2021). 2. M. Malerba, S. Pirotta, G. Aubin, L. Lucia, M. Jeannin, J.-M. Manceau, A. Bousseksou, Q. Lin, J.-F. Lampin, E. Peytavit, S. Barbieri, L. H. Li, A. G. Davies, E. H. Linfield, and R. Colombelli, "Ultrafast (≈10 GHz) mid-IR modulator based on ultrafast electrical switching of the light–matter coupling," Appl. Phys. Lett. 125, 41101 (2024). 3. M. Knorr, J. M. Manceau, J. Mornhinweg, J. Nespolo, G. Biasiol, N.-L. Tran, M. Malerba, P. Goulain, X. Lafosse, M. Jeannin, M. Stefinger, I. Carusotto, C. Lange, R. Colombelli, and R. Huber, "Intersubband Polariton-Polariton Scattering in a Dispersive Microcavity," Phys. Rev. Lett. 128, 247401 (2022). Applications relying on mid-infrared radiation (MIR, 3-12 um) have progressed at a very rapid pace in recent years. In particular, the ultra-fast character of mid-IR devices is becoming central to many applications, with the development of ultra-fast detectors [1] and ultra-fast modulators [2] attracting a lot of attention. In this context, the possibility of ultra-fast optical characterizations in the mid-infrared range is an important research asset [3]. The goal of this project is to develop a degenerate pump-probe setup operating in the mid-IR. The first step of the project will consist of designing and implementing the optical layout of the setup. This includes splitting the OPA output into a pump and a probe beam, setting up a variable optical delay line with sufficient range and resolution to resolve (sub)-picosecond dynamics. A second key aspect concerns the detection scheme. Since the setup is degenerate, pump and probe pulses share the same wavelength, which requires a robust strategy to isolate the probe signal from the scattered pump light. The perspective candidate will also develop the acquisition software (based on Auto-Lab or PyMeasure), including motorized delay line control, synchronization with the detection electronics, data acquisition routines. Funding is provided by an ERC Advanced Grant. The work will take place at the Center for Nanoscience and Nanotechnology, on the Plateau de Saclay. The Center for Nanoscience and Nanotechnology (C2N) is a joint research unit of CNRS, Paris Saclay University, and Paris Cité University. The C2N, with approximately 410 staff, is located in Palaiseau (91), at the heart of the Paris Saclay campus. C2N encompasses four scientific departments (photonics, materials, nanoelectronics, and nanobiofluidic microsystems). This position is located within the photonics department. This position requires access to the cleanroom. Annuncio in inglese. Fonte: Euraxess (Commissione europea).