Ultra-low-power saturation of an ISB transition by a mid-IR quantum cascade laser - Archive ouverte HAL Accéder directement au contenu
Pré-Publication, Document De Travail Année : 2022

Ultra-low-power saturation of an ISB transition by a mid-IR quantum cascade laser

Résumé

We demonstrate that absorption saturation of a mid-infrared intersubband transition can be engineered to occur at moderate light intensities of the order of 10-20 kW.cm$^{-2}$ and at room temperature. The structure consists of an array of metal-semiconductor-metal patches hosting a judiciously designed 253~nm thick GaAs/AlGaAs semiconductor heterostructure. At low incident intensity the structure operates in the strong light-matter coupling regime and exhibits two absorption peaks at wavelengths close to 8.9 $\mu$m. Saturation is detected as a transition to the weak coupling regime - and therefore to a single-peaked absorption - when increasing the incident power. Comparison with a coupled mode theory model explains the data and permits to infer the relevant system parameters. At selected wavelengths the reflectivity non-linearly increases with increasing incident power. This system can therefore be engineered to implement saturable absorption mirrors (SESAMs) in the mid-IR range, a technology currently missing.
Fichier principal
Vignette du fichier
01_Figure1.jpg (164.11 Ko) Télécharger le fichier
02_Figure2.png (871.17 Ko) Télécharger le fichier
03_Figure3.png (675.71 Ko) Télécharger le fichier
ISB_SatExp_ver8.pdf (2.55 Mo) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)

Dates et versions

hal-03910837 , version 1 (22-12-2022)
hal-03910837 , version 2 (12-04-2023)
hal-03910837 , version 3 (26-05-2023)

Licence

Paternité

Identifiants

Citer

Mathieu Jeannin, Eduardo Cosentino, Stefano Pirotta, Mario Malerba, Giorgio Biasiol, et al.. Ultra-low-power saturation of an ISB transition by a mid-IR quantum cascade laser. 2022. ⟨hal-03910837v1⟩
68 Consultations
32 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More