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Conference Paper: Double quantum well phase modulators using surface acoustic waves

TitleDouble quantum well phase modulators using surface acoustic waves
Authors
KeywordsDouble quantum well
Electro-optical modulation
Surface acoustic wave modulator
Acousto-optic device
Piezoelectric effect of surface acoustic wave
Issue Date1999
PublisherSPIE - International Society for Optical Engineering. The Journal's web site is located at http://www.spie.org/app/Publications/index.cfm?fuseaction=proceedings
Citation
Integrated Optics Devices III, San Jose, CA., 25-27 January 1999. In SPIE - International Society for Optical Engineering Proceedings, 1999, v. 3620, p. 45-56 How to Cite?
AbstractElectro-optic modulators using the interaction of surface acoustic waves (SAWs) with III-V semiconductor multiple quantum well structures have gained interests. A SAW induces potential field which provides the phase modulation. In order to improve the phase modulation, an AlGaAs/GaAs asymmetric double quantum well (DQW) optical phase modulator using SAWs is investigated theoretically. The optimization steps of the DQW structure are discussed. The optimized phase modulator structure is found to contain a five-period DQW active region. Analysis of the modulation characteristics show that by using the asymmetric DQW, the large change of the induced potential at the surface and thus large modification of the QW structure can be utilized. The modification of each QW structure is consistent, although this consistency is not always preserved in typical SAW devices. Consequently, the change of refractive index in each of the five DQWs is almost identical. Besides, the change of effective refractive index is 10 times larger here in comparison to a modulator with a five periods single QW as the active region and thus produces a larger phase modulation. In addition, a long wavelength and a low SAW power required here increase the size of the SAW transducer and simplify its fabrication.
Persistent Identifierhttp://hdl.handle.net/10722/46132
ISSN

 

DC FieldValueLanguage
dc.contributor.authorChoy, WCHen_HK
dc.contributor.authorLi, EHen_HK
dc.contributor.authorWeiss, BLen_HK
dc.date.accessioned2007-10-30T06:43:11Z-
dc.date.available2007-10-30T06:43:11Z-
dc.date.issued1999en_HK
dc.identifier.citationIntegrated Optics Devices III, San Jose, CA., 25-27 January 1999. In SPIE - International Society for Optical Engineering Proceedings, 1999, v. 3620, p. 45-56en_HK
dc.identifier.issn0277-786Xen_HK
dc.identifier.urihttp://hdl.handle.net/10722/46132-
dc.description.abstractElectro-optic modulators using the interaction of surface acoustic waves (SAWs) with III-V semiconductor multiple quantum well structures have gained interests. A SAW induces potential field which provides the phase modulation. In order to improve the phase modulation, an AlGaAs/GaAs asymmetric double quantum well (DQW) optical phase modulator using SAWs is investigated theoretically. The optimization steps of the DQW structure are discussed. The optimized phase modulator structure is found to contain a five-period DQW active region. Analysis of the modulation characteristics show that by using the asymmetric DQW, the large change of the induced potential at the surface and thus large modification of the QW structure can be utilized. The modification of each QW structure is consistent, although this consistency is not always preserved in typical SAW devices. Consequently, the change of refractive index in each of the five DQWs is almost identical. Besides, the change of effective refractive index is 10 times larger here in comparison to a modulator with a five periods single QW as the active region and thus produces a larger phase modulation. In addition, a long wavelength and a low SAW power required here increase the size of the SAW transducer and simplify its fabrication.en_HK
dc.languageengen_HK
dc.publisherSPIE - International Society for Optical Engineering. The Journal's web site is located at http://www.spie.org/app/Publications/index.cfm?fuseaction=proceedingsen_HK
dc.relation.ispartofSPIE - International Society for Optical Engineering Proceedings-
dc.rightsS P I E - the International Society for Optical Proceedings. Copyright © S P I E - International Society for Optical Engineering.en_HK
dc.rightsCreative Commons: Attribution 3.0 Hong Kong License-
dc.rightsCopyright 1999 Society of Photo-Optical Instrumentation Engineers. This paper was published in Integrated Optics Devices III, San Jose, California, USA, 25-27 January 1999, v. 3620, p. 45-56 and is made available as an electronic reprint with permission of SPIE. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.en_HK
dc.subjectDouble quantum wellen_HK
dc.subjectElectro-optical modulationen_HK
dc.subjectSurface acoustic wave modulatoren_HK
dc.subjectAcousto-optic deviceen_HK
dc.subjectPiezoelectric effect of surface acoustic waveen_HK
dc.titleDouble quantum well phase modulators using surface acoustic wavesen_HK
dc.typeConference_Paperen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0277-786X&volume=3620&spage=45&epage=56&date=1999&atitle=Double+quantum+well+phase+modulators+using+surface+acoustic+wavesen_HK
dc.description.naturepublished_or_final_versionen_HK
dc.identifier.doi10.1117/12.343756en_HK
dc.identifier.hkuros45476-
dc.identifier.volume3620-
dc.identifier.spage45-
dc.identifier.epage56-

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