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Proceedings Paper

Cavity-resonator-integrated guided-mode resonance filters
Author(s): Shogo Ura; Kenji Kintaka; Junichi Inoue; Kenzo Nishio; Yasuhiro Awatsuji
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Paper Abstract

A cavity-resonator-integrated guided-mode-resonance filter (CRIGF) consisting of a grating coupler (GC) and a pair of distributed-Bragg-reflectors (DBRs) on a thin-film dielectric waveguide is reviewed. The CRIGF has been recently proposed by the authors to provide a narrow-band reflection spectrum for an incident wave of a small beam width from the free space. A newly developed analysis model for device design with performance simulation is introduced. Curved gratings are utilized to construct a resonator for a small-aperture CRIGF. Design, fabrication and characterization of CRIGFs of 10 μm aperture are described with a resonance wavelength of 850 nm. A Ge:SiO2 guiding core layer was deposited on a SiO2 glass substrate, and GC and DBRs were formed by the electron-beam direct writing lithography. A normal polarization-dependent CRIGF is shown with a obtained narrowband reflection spectrum of 0.2 nm full width at half maximum. A crossed-CRIGF is also discussed to eliminate the polarization dependence. It is successfully demonstrated that measured reflection spectra for TE and TM incident beams were well coincident with each other.

Paper Details

Date Published: 15 March 2013
PDF: 11 pages
Proc. SPIE 8633, High Contrast Metastructures II, 86330V (15 March 2013); doi: 10.1117/12.2008625
Show Author Affiliations
Shogo Ura, Kyoto Institute of Technology (Japan)
Kenji Kintaka, National Institute of Advanced Industrial Science and Technology (Japan)
Junichi Inoue, Kyoto Institute of Technology (Japan)
Kenzo Nishio, Kyoto Institute of Technology (Japan)
Yasuhiro Awatsuji, Kyoto Institute of Technology (Japan)

Published in SPIE Proceedings Vol. 8633:
High Contrast Metastructures II
Connie J. Chang-Hasnain; Fumio Koyama; Alan Eli Willner; Weimin Zhou, Editor(s)

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