Resonant structures for infrared detection.
Appl Opt
; 56(3): B26-B36, 2017 Jan 20.
Article
em En
| MEDLINE
| ID: mdl-28157862
ABSTRACT
We are developing resonator-quantum well infrared photodetectors (R-QWIPs) for long-wavelength applications. Detector pixels with 25 µm pitch were hybridized to fan-out circuits for radiometric measurements. With a moderate doping of 0.5×1018 cm-3, we achieved a quantum efficiency (QE) of 37% and conversion efficiency (CE) of 15% in a 1.3 µm thick active material and 35% QE and 21% CE in a 0.6 µm thick active material. Both detectors are cutoff at 10.5 µm with a 2 µm bandwidth. The temperature at which photocurrent equals dark current is about 65 K under F/2 optics. The thicker detector shows a large QE polarity asymmetry due to nonlinear potential drop in the QWIP material layers.
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1
Coleções:
01-internacional
Base de dados:
MEDLINE
Tipo de estudo:
Diagnostic_studies
Idioma:
En
Revista:
Appl Opt
Ano de publicação:
2017
Tipo de documento:
Article