Wavelength-selective infrared Salisbury screen absorber.
Appl Opt
; 53(11): 2431-6, 2014 Apr 10.
Article
em En
| MEDLINE
| ID: mdl-24787414
ABSTRACT
Experimental long wavelength infrared spectral response characterization of a narrowband Salisbury screen absorber suitable for use in microbolometer focal plane arrays is presented. We have demonstrated a microfabricated germanium dielectric support structure layer that replaces the usual silicon nitride structural layer in microbolometers. The fabricated Salisbury screen absorber consists of a chromium resistive sheet as an absorber layer above a germanium dielectric/air-gap/interference structure. In order to produce wavelength-selective narrowband absorption, the general design rules for the germanium dielectric supported Salisbury screen show that the thickness of the air gap should be a half wavelength thick and the optical thickness of the germanium layer a quarter dielectric wavelength thick.
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01-internacional
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MEDLINE
Idioma:
En
Ano de publicação:
2014
Tipo de documento:
Article