Ultracompact tapered coupler for the Si/III-V heterogeneous integration
2015 (English)In: Applied Optics, ISSN 1559-128X, E-ISSN 2155-3165, Vol. 54, no 14, 4327-4332 p.Article in journal (Refereed) Published
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.
Place, publisher, year, edition, pages
2015. Vol. 54, no 14, 4327-4332 p.
Other Physics Topics
IdentifiersURN: urn:nbn:se:kth:diva-169136DOI: 10.1364/AO.54.004327ISI: 000354191500004PubMedID: 25967484ScopusID: 2-s2.0-84942365980OAI: oai:DiVA.org:kth-169136DiVA: diva2:820410
QC 201506122015-06-122015-06-112015-06-12Bibliographically approved