Optical manipulation of guided mode resonance in azo-copolyme waveguide gratings

Author

Chia Chen Hsu ; Jian Hung Lin ; Jian Hao Huang ; Hung-Chih Kan

Author_Institution

Nat. Chung Cheng Univ., Chiayi, Taiwan

fYear

2014

fDate

17-21 Aug. 2014

Firstpage

35

Lastpage

36

Abstract

Optical tuning of guided mode resonance (GMR) is demonstrated in an azo-copolymer waveguide grating structure (WGS), comprised of a one-dimensional holographic surface relief grating inscribed on top of an azo-copolymer planar waveguide layer. The resonance wavelength of GMR is blue-shifted by pumping the WGS with a linear polarized laser beam at 514 nm as a result of the photoinduced refractive index change in the waveguide layer. The GMR cannot return to its original resonance wavelength just by turning off the pumping beam. To make a full-recovery, the WGS has to be illuminated by the same pumping beam but with an orthogonal polarization.

Keywords

diffraction gratings; laser beams; optical planar waveguides; optical pumping; optical tuning; polymer blends; refractive index; GMR; WGS; azo-copolymer waveguide gratings; blue shift; guided mode resonance; linear polarized laser beam; optical manipulation; optical tuning; orthogonal polarization; photoinduced refractive index change; resonance wavelength; wavelength 514 nm; Gratings; Laser beams; Optical filters; Optical pumping; Optical waveguides; Pump lasers;

fLanguage

English

Publisher

ieee

Conference_Titel

Optical MEMS and Nanophotonics (OMN), 2014 International Conference on

Conference_Location

Glasgow

ISSN

2160-5033

Print_ISBN

978-0-9928-4140-9

Type

conf

DOI

10.1109/OMN.2014.6924506

Filename

6924506