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Ultracompact tapered coupler for the Si/III-V heterogeneous integration
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2015 (English)In: Applied Optics, ISSN 1559-128X, E-ISSN 2155-3165, Vol. 54, no 14, 4327-4332 p.Article in journal (Refereed) Published
Abstract [en]

An ultracompact tapered coupler, which is suitable for mode transformation between a 220 nm high silicon wire waveguide and a Si/III-V hybrid waveguide, is proposed for Si/III-V heterogeneous integration. The tapered coupler is composed of three sections. Since the tapered coupler avoids exciting the unwanted high-order modes in the III-V waveguide, the length of the tapered coupler can be dramatically shortened. In the proposed structure, the total length of the trisectional tapered coupler can be as short as 8 mu m with a fundamental mode-coupling efficiency of over 95% in a bandwidth of over 100 nm. The alignment tolerance of the proposed structure is also analyzed.

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2015. Vol. 54, no 14, 4327-4332 p.
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URN: urn:nbn:se:kth:diva-169136DOI: 10.1364/AO.54.004327ISI: 000354191500004PubMedID: 25967484ScopusID: 2-s2.0-84942365980OAI: diva2:820410

QC 20150612

Available from: 2015-06-12 Created: 2015-06-11 Last updated: 2015-06-12Bibliographically approved

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He, Sailing
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