HCG reflectivity characteristics for a small-sized beam spot

Author

Kikuchi, A. ; Nakagawa, Daisuke ; Miyamoto, Takahiro

Author_Institution

Photonics Integration Syst. Res. Center, Tokyo Inst. of Technol., Yokohama, Japan

fYear

2013

fDate

27-30 Oct. 2013

Firstpage

1

Lastpage

2

Abstract

A high contrast grating (HCG) mirror was investigated in the case of the wavelength-scale small beam spot system by the numerical simulations. It was found that a reflectivity dependence on the spacer thickness showed a large reflectivity oscillation unlike a plane wave system. A thin spacer thickness was indispensable for a high reflectivity by suppression of the beam diffraction. The number of the HCG grating was also discussed and the number of covering the waveguide core area or more was important for high reflectivity. A 70% of reflectivity can be obtained by a single grating.

Keywords

diffraction gratings; light diffraction; light reflection; mirrors; numerical analysis; optical waveguides; reflectivity; HCG grating; HCG reflectivity characteristics; beam diffraction suppression; high contrast grating mirror; high reflectivity; large reflectivity oscillation; numerical simulations; plane wave system; reflectivity dependence; single grating; small-sized beam spot; thin spacer thickness; waveguide core area; wavelength-scale small beam spot system; Gratings; Mirrors; Oscillators; Photonics; Reflection; Reflectivity;

fLanguage

English

Publisher

ieee

Conference_Titel

Microoptics Conference (MOC), 2013 18th

Conference_Location

Tokyo

Type

conf

Filename

6715103