Extended backside-illuminated InGaAs on GaAs IR detectors

Joachim John, Lars Zimmermann, Patrick Merken, Gustaaf Borghs, Chris Van Hoof, Stefan Nemeth

Publikation: Beitrag in FachzeitschriftKonferenzartikelBegutachtung

Abstract

Diode structures of short wavelength infrared (SWIR) InGaAs material were grown epitaxially on 3" GaAs substrates by molecular beam epitaxy. Despite the large lattice mismatch of 6% between In0.8Ga0.2As and GaAs the diode performance allows applications in spectroscopy and imaging. Photovoltaic diode characterization measures like R0A product and quantum efficiency were extracted from I-V curves. The layers are processed with standard photolithography and micro-structuring tools and finally flip-chip bonded on a silicon read out integrated circuit (ROIC). Linear arrays of 256 and 512 pixel with 25 μm pitch were fabricated as well as focal plane arrays (FPA) of 256 × 320 pixel with 30 μm pitch. Functionality is proven by using the assemblies in systems for spectroscopy and beam profiling up to 2.5 μm wavelength.

OriginalspracheEnglisch
Seiten (von - bis)453-459
Seitenumfang7
FachzeitschriftProceedings of SPIE - The International Society for Optical Engineering
Jahrgang4820
Ausgabenummer1
DOIs
PublikationsstatusVeröffentlicht - 2002
VeranstaltungInfrared Technology and Applications XXVIII - Seattle, WA, USA/Vereinigte Staaten
Dauer: 7 Juli 200211 Juli 2002

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