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Efficient infrared electroabsorption with 1 V applied voltage swing using intersubband transitions
KTH, Skolan för informations- och kommunikationsteknik (ICT), Mikroelektronik och tillämpad fysik, MAP.
KTH, Skolan för informations- och kommunikationsteknik (ICT), Mikroelektronik och tillämpad fysik, MAP.
KTH, Skolan för informations- och kommunikationsteknik (ICT), Mikroelektronik och tillämpad fysik, MAP.
KTH, Skolan för informations- och kommunikationsteknik (ICT), Mikroelektronik och tillämpad fysik, MAP.
2008 (engelsk)Inngår i: Applied Physics Letters, ISSN 0003-6951, E-ISSN 1077-3118, Vol. 93, nr 19, artikkel-id 191101Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

We have demonstrated efficient intersubband electroabsorption in InGaAs/InAlGaAs/InAlAs step quantum wells grown by metal-organic vapor-phase epitaxy. An absorption modulation of 6 dB (Delta alpha=2300 cm(-1)) at lambda similar to 5.7 mu m due to Stark shift of the intersubband resonance was achieved at a low applied voltage swing of +/- 0.5 V in a multipass waveguide structure. The interface intermixing was estimated by comparing experimental and theoretical Stark shifts. It is predicted that the present material in a strongly confining surface plasmon waveguide can yield an electroabsorption modulator with a peak-to-peak voltage of V-pp=0.9 V and modulation speed of f(3dB)approximate to 130 GHz.

sted, utgiver, år, opplag, sider
American Institute of Physics (AIP), 2008. Vol. 93, nr 19, artikkel-id 191101
Emneord [en]
aluminium compounds, electroabsorption, electro-optical modulation, gallium arsenide, III-V semiconductors, indium compounds, infrared, spectra, optical waveguides, semiconductor quantum wells, spectral line, shift, Stark effect, surface plasmons, quantum cascade lasers, stark shift, modulator, wells, exchange
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Identifikatorer
URN: urn:nbn:se:kth:diva-17977DOI: 10.1063/1.3013360ISI: 000260944100001Scopus ID: 2-s2.0-56249147462OAI: oai:DiVA.org:kth-17977DiVA, id: diva2:336022
Forskningsfinansiär
Swedish Research Council
Merknad

QC 20100525

Tilgjengelig fra: 2010-08-05 Laget: 2010-08-05 Sist oppdatert: 2017-12-12bibliografisk kontrollert

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