Far‐infrared photoresponse of the InAs/GaInSb superlattice

Autor:	Herbert Kroemer, Darryl L. Smith, I. Sela, B. K. Laurich, Colombo R. Bolognesi, L. A. Samoska, Arthur C. Gossard, Ian Campbell
Rok vydání:	1991
Předmět:	Physics and Astronomy (miscellaneous) Far infrared Condensed matter physics Chemistry Band gap Exciton Superlattice Photoconductivity Photodetector Nanosecond Molecular physics Spectral line
Zdroj:	Applied Physics Letters. 59:846-848
ISSN:	1077-3118 0003-6951
DOI:	10.1063/1.105255
Popis:	We describe the growth and characterization of the InAs/GaInSb superlattice on GaSb substrates. We present far‐infrared (λ∼10 μm) photoabsorption and photoconductivity spectra which are in good agreement with theoretical predictions for the photoresponse of this spatially indirect superlattice. We report time‐resolved photoconductivity measurements in which two response times are observed. We interpret the fast, 2 ns decay as resulting from electron‐hole recombination via deep defect levels and the slow, 2 μs decay as resulting from recombination of a small fraction of the photogenerated minority carriers which become trapped at a defect site.
Databáze:	OpenAIRE
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