Skip to Main content Skip to Navigation
Theses

Etude expérimentale et théorique de la réponse angulaire et de la réponse spectrale hors bande de détecteurs infrarouges hautes performances.

Abstract : Infrared detectors have proved to be of particular interest in very various application fields (military, medical, astronomy, environment). Each of them exhibits specific requirements, such that one unique type of infrared detectors can n! ot be suited for all applications. Nowadays, many different detectors coexist. Yet the traditional figures of merit don't allow one to compare the performance of different technologies for a specific application. Within the framework of this study, carried out on infrared quantum detectors of high performances such as the quantum well infrared photodetectors (QWIP) and the MCT detectors, we focused on two new figures of merit : the off-band spectral response and the angular response. The first one consists in studying the spectral response of a detector far from the wavelength the detector has been optimised for, thanks to a great dynamics of measurement. The second figure of merit represents the variation of the response of the detector according to the angle of incidence of the incoming light. The set up of these electro-optical characterizations required the development of innovating test benches. Among the results obtained during our work on the angular response, let us underline that the shape of a QWIP angular response doesn't depend on the etch depth of grating or that the angular response of a MCT detector is flat on a wide angular range. The study of the off-band spectral response, as for it, made it possible to highlight physical phenomena never observed until then on a QWIP photocurrent spectrum. This work shows how important the comprehension of the physical phenomena inside the pixels is. Measurements associated with an accurate model of physical phenomena lead thus to a complete study of the infrared quantum detectors ultimate performances.
Document type :
Theses
Complete list of metadatas

Cited literature [47 references]  Display  Hide  Download

https://pastel.archives-ouvertes.fr/pastel-00003710
Contributor : Ecole Polytechnique <>
Submitted on : Thursday, July 22, 2010 - 11:34:01 AM
Last modification on : Friday, October 23, 2020 - 4:52:13 PM
Long-term archiving on: : Monday, October 25, 2010 - 11:22:19 AM

Identifiers

  • HAL Id : pastel-00003710, version 1

Collections

Citation

Judikaël Le Rouzo. Etude expérimentale et théorique de la réponse angulaire et de la réponse spectrale hors bande de détecteurs infrarouges hautes performances.. Physique [physics]. Ecole Polytechnique X, 2007. Français. ⟨pastel-00003710⟩

Share

Metrics

Record views

579

Files downloads

5085