Compact mid-IR frequency combs enabled by semiconductor saturable absorption mirrors (SESAMs) (M/F)

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Compact mid-IR frequency combs enabled by semiconductor saturable absorption mirrors (SESAMs) (M/F) Sintesi in italiano (traduzione automatica): L'Università Paris Saclay e il CNRS offrono una posizione di ricercatore post-dottorato di due anni nel team di dispositivi quantistici Mid-IR/THz. Il candidato si occuperà dello sviluppo di modulatori ultra-veloci a mid-IR, ottimizzando la velocità di modulazione fino a diversi GHz. La posizione è supportata da un ERC Advanced Grant e si trova a sud di Parigi, in una delle università più prestigiose della Francia. È richiesta una laurea di dottorato in fisica, ingegneria elettronica o un campo correlato. Il salario è negoziabile in base all'esperienza del candidato. Il progetto mira a sviluppare dispositivi innovativi sfruttando effetti di elettrodinamica quantistica per applicazioni in fotonica mid-infrarossa. Position: 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 the project is to develop mid-IR ultra-fast modulators. At the device level, this means optimizing the device modulation speed up to several GHz integrating RF technology to the devices. 1. P.-B. Vigneron, S. Pirotta, I. Carusotto, N.-L. Tran, G. Biasiol, J.-M. Manceau, A. Bousseksou, and R. Colombelli, "Quantum well infrared photo-detectors operating in the strong light-matter coupling regime," Appl. Phys. Lett. 114, 131104 (2019). 2. M. Lagrée, M. Jeannin, G. Quinchard, O. Ouznali, A. Evirgen, V. Trinité, R. Colombelli, and A. Delga, "Direct polariton-to-electron tunneling in quantum cascade detectors operating in the strong light-matter coupling regime," Phys. Rev. Appl. 17, 44021 (2021). 3. S. Pirotta, N.-L. Tran, A. Jollivet, G. Biasiol, P. Crozat, J.-M. Manceau, A. Bousseksou, and R. Colombelli, "Fast amplitude modulation up to 1.5 GHz of mid-IR free-space beams at room-temperature," Nat. Commun. 12, 799 (2021). 4. 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). 5. A. Schliesser, N. Picqué, and T. W. Hänsch, "Mid-infrared frequency combs," Nat. Photonics 6, 440–449 (2012). 6. A. Parriaux, K. Hammani, and G. Millot, "Electro-optic frequency combs," Adv. Opt. Photonics 12, 223 (2020). 7. M. Hakl, Q. Y. Lin, S. Lepillet, M. Billet, J.-F. Lampin, S. Pirotta, R. Colombelli, W. J. Wan, J. C. Cao, H. Li, E. Peytavit, and S. Barbieri, "Ultra-fast quantum-well infared photodetectors operating at 10{\mu}m with flat response up to 70GHz at room temperature," (2020). Applications relying on mid-infrared radiation (MIR, 3-12 um) have progressed at a very rapid pace in recent years. MIR cameras have propelled the field of thermal imaging; the invention of the quantum cascade laser (QCL) was a milestone that made compact MIR laser sources commercially available for a wide range of applications. All recent advances have resulted from the development of revolutionary optical components. A crucial feature for most photonic systems is the ability to electrically modulate the amplitude and / or phase of a beam at speeds of the order of GHz or higher. This is a valuable feature for a multitude of applications in MIR photonics, such as laser stabilization, coherent detection, spectroscopy and optical communications. A strategy to implement this vision is to develop active microcavity arrays whose optical properties can be modulated at ultra-fast (GHz) via an electrical input. These so-called “patch” antennas are commonly used in the radio-wave regime, and the novelty here is the translation to optical wavelengths, mid-IR in this case. In the case of modulators, it means developing a nano-structured surface that is capable of applying ultra-fast RadioFrequency (RF) modulation to a laser beam propagating in free space, whether in reflection or in transmission. We have developed a modulator demonstrator [3], and we have also improved its performances in a 2nd generation devices [4]. The goal of the project, is to bring to maturity this idea. At the device level, this means optimizing the device modulati Annuncio in inglese. Fonte: Euraxess (Commissione europea).