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Efficient electroabsorption for mid-infrared wavelengths using intersubband transitions
KTH, School of Information and Communication Technology (ICT), Microelectronics and Information Technology, IMIT.
KTH, School of Information and Communication Technology (ICT), Microelectronics and Information Technology, IMIT.
KTH, School of Information and Communication Technology (ICT), Microelectronics and Information Technology, IMIT.
KTH, School of Information and Communication Technology (ICT), Microelectronics and Information Technology, IMIT.
2008 (English)In: PROCEEDINGS OF THE 17TH INTERNATIONAL VACUUM CONGRESS/13TH INTERNATIONAL CONFERENCE ON SURFACE SCIENCE/INTERNATIONAL CONFERENCE ON NANOSCIENCE AND TECHNOLOGY / [ed] Johansson LSO, Andersen JN, Gothelid M, Helmersson U, Montelius L, Rubel M, Setina J, Wernersson LE, Bristol: IOP PUBLISHING LTD , 2008, Vol. 100Conference paper, Published paper (Refereed)
Abstract [en]

We have demonstrated efficient intersubband (IS) electroabsorption in InGaAs/InAlGaAs/InAlAs step quantum wells grown by metal-organic vapor phase epitaxy (MOVPE). An absorption modulation of 2300 cm(-1) at lambda=5.7 mu m due to Stark shift of the IS resonance was achieved with a low applied voltage swing of +/-0.5 V in a multipass waveguide structure. Two useful wavelength ranges of lambda approximate to 5.4-5.8 mu m and 6.3-6.6 mu m were obtained by considering the two flanks of the IS resonance. Based on the experimental results it is estimated that an electroabsorption modulator with a low peak-to-peak voltage of V-PP = 0.9 V can yield a modulation speed of f(3dB) = 120 GHz with the present material by using a strongly confining surface plasmon waveguide of 30 mu m length.

Place, publisher, year, edition, pages
Bristol: IOP PUBLISHING LTD , 2008. Vol. 100
Series
Journal of Physics Conference Series, ISSN 1742-6588 ; 100
National Category
Electrical Engineering, Electronic Engineering, Information Engineering Computer and Information Science
Identifiers
URN: urn:nbn:se:kth:diva-30135DOI: 10.1088/1742-6596/100/4/042009ISI: 000275655200057Scopus ID: 2-s2.0-77954337638OAI: oai:DiVA.org:kth-30135DiVA: diva2:401946
Conference
17th International Vacuum Congress/13th International Conference on Surface Science/Internatinal Conference on Nanoscience and Technology Stockholm, SWEDEN, JUL 02-06, 2007
Available from: 2011-03-04 Created: 2011-02-21 Last updated: 2011-09-09Bibliographically approved

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Holmström, PetterJänes, PeterEkenberg, UlfThylen, Lars
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