Theory of coherent optical nonlinearities of intersubband transitions in semiconductor quantum wells

Autor: R. Cominotti, H. A. M. Leymann, J. Nespolo, J.-M. Manceau, M. Jeannin, R. Colombelli, I. Carusotto
Přispěvatelé: Università degli Studi di Trento (UNITN), Centre de Nanosciences et de Nanotechnologies (C2N), Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), European Project: 737017,MIRBOSE
Rok vydání: 2021
Předmět:
Zdroj: Physical Review B
Physical Review B, 2023, 107 (11), pp.115431. ⟨10.1103/PhysRevB.107.115431⟩
ISSN: 2469-9950
2469-9969
DOI: 10.48550/arxiv.2109.00285
Popis: International audience; We theoretically study the coherent nonlinear response of electrons confined in semiconductor quantum wells under the effect of an electromagnetic radiation close to resonance with an intersubband transition. Our approach is based on the time-dependent Schrödinger-Poisson equation stemming from a Hartree description of Coulomb-interacting electrons. This equation is solved by standard numerical tools and the results are interpreted in terms of approximated analytical formulas. For growing intensity, we observe a red-shift of the effective resonance frequency due to the reduction of the electric dipole moment and the corresponding suppression of the depolarization shift. The competition between coherent nonlinearities and incoherent saturation effects is discussed. The strength of the resulting optical nonlinearity is estimated across different frequency ranges from Mid-IR to THz with an eye to ongoing experiments on Bose-Einstein condensation of intersubband polaritons and to the speculative exploration of quantum optical phenomena such as single-photon emission in the Mid-IR and THz windows.
Databáze: OpenAIRE
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