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Cladding-free efficiently tunable nanobeam cavity with nanotentacles
KTH, School of Electrical Engineering (EES), Electromagnetic Engineering. Zhejiang University, China.
2017 (English)In: Optics Express, ISSN 1094-4087, E-ISSN 1094-4087, Vol. 25, no 11, 12541-12551 p.Article in journal (Refereed) Published
Abstract [en]

We propose a cladding-free, efficiently tunable, high-quality factor (Q) nanobeam cavity with subwavelength-period nanotentacles (NT), adequately investigate the performance of the cavity, and study the directional heat transfer. By virtue of the excellent heat transfer of Si nanotentacles, a tuning range of more than 6 nm wavelength, with 24mW and 10 KHz switching rate, and 13 μs raising time is experimentally obtained. This result is about twentyfold better than the previous work by Fegadolli [ACS Photon. 2, 470-474 (2015)]. A potential 12nm tuning range with identical power is also theoretically suggested by modifying the silicon structure. With an optimized design, these nanotentacles are demonstrated to have a minimal effect to the cavity and are available to serve as photonic waveguides. This cladding-free design, with a simple fabrication process, is comparable to other proposals in which deep etching, suspended treatment, and troublesome heterogeneousintegration may be needed. Finally but importantly, this smart design can be applied to other photonic cavities, particularly cavities such as ring/disk resonators, in which we reasonably predict a better tuning efficiency due to the thermal circulation. We believe this design is fairly suitable for applications in which light-matter interaction is of primary importance, such as sensing, particle trapping, cavity quantum electrodynamics (CQED), and III-V/Si hybrid lasers with external cavities.

Place, publisher, year, edition, pages
Optical Society of America, 2017. Vol. 25, no 11, 12541-12551 p.
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Identifiers
URN: urn:nbn:se:kth:diva-209612DOI: 10.1364/OE.25.012541ISI: 000403940700046Scopus ID: 2-s2.0-85020006261OAI: oai:DiVA.org:kth-209612DiVA: diva2:1113811
Note

QC 20170622

Available from: 2017-06-22 Created: 2017-06-22 Last updated: 2017-07-11Bibliographically approved

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CiteExportLink to record
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