Ultimate performance of quantum well infrared photodetectors in the tunneling regime

Ribet-Mohamed

Péré‐Laperne

et al. 2011

Abstract:Quantum Well Infrared Photodetector (QWIP) usually suffer from a too moderate quantum efficiency and too large dark current which is often announced as crippling for low flux applications. Despite this reputation we demonstrate the ability of QWIP for the low infrared photon flux detection. We present the characterization of a state of the art 14.5µm QWIP from Alcatel-Thales 3-5 Lab. We developed a predictive model of the performance of an infrared instrument for a given application. The considered scene is a Cryogenic Wind Tunnel (ETW), where a specific Si:Ga camera is currently used. Using this simulation tool we demonstrate the QWIP ability to image a low temperature scene in this scenario. QWIP detector is able to operate at 30K with a NETD as low as 130mK. In comparison to the current detector, the temperature of use is three times higher and the use of a QWIP based camera would allow a huge simplification of the optical part. : 85.60Bt, 85.60Gz PACS

Section: Characterizationmentioning

confidence: 87%

“…The QWIP is processed into mesa of 23.5µm length and a grating is etched on the surface of each pixel. The structure is much more described in ref [6,7].…”

Section: Samplementioning

confidence: 99%

Dark current reduction in a long wavelength quantum well infrared photodetector operating at low temperature

Ribet-Mohamed

Péré‐Laperne

et al. 2011

“…In addition, the push for higher operating temperature makes improvements even more challenging. In QWIP devices, the active layer is already operating close to its quantum limits 5,6,7,8 . New paradigms are thus necessary to achieve both higher operating temperature and reduced cost.…”

Section: Interest In Colloidal Materials In Infrared Detectionmentioning

confidence: 99%

Colloidal quantum dots for mid-IR applications

Keuleyan

Guyot‐Sionnest

2013

The use of colloidal material offers an interesting alternative to top down approaches for the realization of low cost infrared detectors. We demonstrate photoconduction in thin films of a colloidal material in the mid infrared (up to 7µm), using HgTe colloidal quantum dots. Thin films of the colloidal quantum dots have a large absorption coefficient (>10 4 cm-1), and the photoconductive response is dramatically improved by encapsulating the nanoparticle into an inorganic matrix of As2S3. Such devices show fast response and large detectivity (>10 10 jones) at temperatures above 200 K.

Section: Characterizationmentioning

confidence: 99%

15μm Quantum Well Infrared Photodetector for thermometric imagery in cryogenic windtunnel

Ribet-Mohamed

Péré‐Laperne

et al. 2010

a b s t r a c tQuantum Well Infrared Photodetector (QWIP) usually suffer from a too moderate quantum efficiency and too large dark current which is often announced as crippling for low flux applications. Despite this reputation we demonstrate the ability of QWIP for the low infrared photon flux detection. We present the characterization of a state of the art 14.5 lm QWIP from Alcatel-Thales III-V Lab. We developed a predictive model of the performance of an infrared instrument for a given application. The considered scene is a cryogenic wind tunnel (ETW), where a specific Si:Ga camera is currently used. Using this simulation tool we demonstrate the QWIP ability to image a low temperature scene in this scenario. QWIP detector is able to operate at 30 K with a NETD as low as 130 mK. In comparison to the current detector, the operating temperature is 20 K higher. The use of a QWIP based camera would allow a huge simplification of the optical part.