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Article: Asymmetric double-quantum-well phase modulator using surface acoustic waves

TitleAsymmetric double-quantum-well phase modulator using surface acoustic waves
Authors
KeywordsAcoustooptic device
Double quantum well
Electrooptical modulation
Piezoelectric effect of surface acoustic waves
Surface acoustic wave modulator
Issue Date1998
PublisherIEEE.
Citation
Ieee Journal Of Quantum Electronics, 1998, v. 34 n. 10, p. 1846-1853 How to Cite?
AbstractAn AlGaAs-GaAs asymmetric double-quantum-well (DQW) optical phase modulator using surface acoustic waves is investigated theoretically. The optimization steps of the DQW structure, which so far have not been reported in detail, are discussed here. The optimized phase modulator structure is found to contain a five-period QDW active region. A surface acoustic wave induces a potential field which provides the phase modulation. 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 quantum-well (QW) structure can be utilized. The modification of each QW structure is consistent, although this consistency is not always preserved in typical surface acoustic wave devices. Consequently, the change of refractive index in each of the five DQW's is almost identical. Besides, the change of effective refractive index is ten times larger here in comparison to a modulator with a five-period single QW as the active region and thus produces a larger phase modulation. In addition, a long wavelength and a low surface acoustic wave power required here simplify the fabrication of surface acoistic wave transducer and the acoustooptic phase modulator.
Persistent Identifierhttp://hdl.handle.net/10722/42818
ISSN
2015 Impact Factor: 1.843
2015 SCImago Journal Rankings: 1.128
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorChoy, WCHen_HK
dc.contributor.authorLi, EHen_HK
dc.contributor.authorWeiss, BLen_HK
dc.date.accessioned2007-03-23T04:32:46Z-
dc.date.available2007-03-23T04:32:46Z-
dc.date.issued1998en_HK
dc.identifier.citationIeee Journal Of Quantum Electronics, 1998, v. 34 n. 10, p. 1846-1853en_HK
dc.identifier.issn0018-9197en_HK
dc.identifier.urihttp://hdl.handle.net/10722/42818-
dc.description.abstractAn AlGaAs-GaAs asymmetric double-quantum-well (DQW) optical phase modulator using surface acoustic waves is investigated theoretically. The optimization steps of the DQW structure, which so far have not been reported in detail, are discussed here. The optimized phase modulator structure is found to contain a five-period QDW active region. A surface acoustic wave induces a potential field which provides the phase modulation. 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 quantum-well (QW) structure can be utilized. The modification of each QW structure is consistent, although this consistency is not always preserved in typical surface acoustic wave devices. Consequently, the change of refractive index in each of the five DQW's is almost identical. Besides, the change of effective refractive index is ten times larger here in comparison to a modulator with a five-period single QW as the active region and thus produces a larger phase modulation. In addition, a long wavelength and a low surface acoustic wave power required here simplify the fabrication of surface acoistic wave transducer and the acoustooptic phase modulator.en_HK
dc.format.extent170696 bytes-
dc.format.extent31232 bytes-
dc.format.mimetypeapplication/pdf-
dc.format.mimetypeapplication/msword-
dc.languageengen_HK
dc.publisherIEEE.en_HK
dc.relation.ispartofIEEE Journal of Quantum Electronicsen_HK
dc.rights©1998 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.en_HK
dc.rightsCreative Commons: Attribution 3.0 Hong Kong License-
dc.subjectAcoustooptic deviceen_HK
dc.subjectDouble quantum wellen_HK
dc.subjectElectrooptical modulationen_HK
dc.subjectPiezoelectric effect of surface acoustic wavesen_HK
dc.subjectSurface acoustic wave modulatoren_HK
dc.titleAsymmetric double-quantum-well phase modulator using surface acoustic wavesen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0018-9197&volume=34&issue=10&spage=1846&epage=1853&date=1998&atitle=Asymmetric+double-quantum-well+phase+modulator+using+surface+acoustic+wavesen_HK
dc.identifier.emailChoy, WCH:chchoy@eee.hku.hken_HK
dc.identifier.authorityChoy, WCH=rp00218en_HK
dc.description.naturepublished_or_final_versionen_HK
dc.identifier.doi10.1109/3.720217en_HK
dc.identifier.scopuseid_2-s2.0-0032187455en_HK
dc.identifier.hkuros45800-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-0032187455&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume34en_HK
dc.identifier.issue10en_HK
dc.identifier.spage1846en_HK
dc.identifier.epage1853en_HK
dc.identifier.isiWOS:000076029100009-
dc.publisher.placeUnited Statesen_HK
dc.identifier.scopusauthoridChoy, WCH=7006202371en_HK
dc.identifier.scopusauthoridLi, EH=7201410087en_HK
dc.identifier.scopusauthoridWeiss, BL=7402309717en_HK

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