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High-Q side-coupled semi-2D-photonic crystal cavity
KTH, School of Electrical Engineering (EES), Electromagnetic Engineering. Zhejiang Provincial Key Laboratory for Sensing Technologies, Zijingang Campus, Zhejiang University, China.
2016 (English)In: Scientific Reports, ISSN 2045-2322, E-ISSN 2045-2322, Vol. 6, 26038Article in journal (Refereed) PublishedText
Abstract [en]

High-Q semi-2D-photonic crystal cavities with a tapered edge and side-coupled bus waveguide are demonstrated. With a quadratic design, the unloaded cavity presents a theoretical ultrahigh quality factor up to 6.7 x 10(7) for the condition that there are mere 34 holes in the propagated direction, which is pretty close to the 2D and 1D counterpart. Combined with a side-coupled bus waveguide, an all-pass-type cavity with a loaded quality factor (Q) of over 2.4 x 10(4) and an extinction ratio over 10 dB are experimentally demonstrated. An experimental loaded Q up to 1.1 x 10(5) are also achieved by tuning the coupling between the cavity and the bus waveguide, which is much larger than any reported surface-mode cavity. This cavity is quite suitable for sensors, filters and especially optomechanical devices thanks to the mechanical stability of the cavity and flexibility of the bus waveguide.

Place, publisher, year, edition, pages
Nature Publishing Group, 2016. Vol. 6, 26038
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering
URN: urn:nbn:se:kth:diva-188438DOI: 10.1038/srep26038ISI: 000376135600001PubMedID: 27194203ScopusID: 2-s2.0-84970023791OAI: diva2:936798

QC 20160614

Available from: 2016-06-14 Created: 2016-06-10 Last updated: 2016-06-14Bibliographically approved

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He, Sailing
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