Novel optoelectronic single quantum well devices based on electron bleaching of exciton absorption

Novel planar optoelectronic devices with two-dimensional exciton absorption controlled by free-carrier-induced bleaching are proposed. Exciton-resonant light propagates along a single mode rib waveguide containing a single quantum well (SQW), the only absorbing medium in the waveguide. Three such de...

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Bibliographic Details
Published in:Applied physics letters 1987-03, Vol.50 (12), p.708-710
Main Authors: KASTALSKY, A, ABELES, J. H, LEHENY, R. F
Format: Article
Language:English
Subjects:
Applied sciences
Circuit properties
Electric, optical and optoelectronic circuits
Electronics
Exact sciences and technology
Miscellaneous
Optical and optoelectronic circuits
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Summary:Novel planar optoelectronic devices with two-dimensional exciton absorption controlled by free-carrier-induced bleaching are proposed. Exciton-resonant light propagates along a single mode rib waveguide containing a single quantum well (SQW), the only absorbing medium in the waveguide. Three such devices operating as optical modulators are (1) a gate-controlled field-effect transistor optical modulator (FETOM), (2) an optically readable memory element, and (3) an optically switched charge storage device. The FETOM, in which free-carrier density in the SQW is controlled by gate voltage, offers high speed (37.5 ps), small size (125 μm), and low power (86 nW/MHz).
ISSN:0003-6951
1077-3118
DOI:10.1063/1.98074