Open AccessOptical modulation of guided mode resonance in the waveguide grating structure incorporated with azo-doped-poly(methylmethacrylate) cladding layer
Author(s) -
Jian Hung Lin,
Yen-Lin Huang,
Ngoc DiepLai,
Hung-Chih Kan,
Chia Chen Hsu
Publication year - 2011
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.20.000377
Subject(s) - materials science , cladding (metalworking) , optics , guided mode resonance , cladding mode , wavelength , refractive index , optoelectronics , resonance (particle physics) , grating , diffraction grating , optical fiber , polarization maintaining optical fiber , fiber optic sensor , physics , particle physics , metallurgy
Optical modulation of guided mode resonance (GMR) is demonstrated in a waveguide grating structure (WGS) which contains a disperse-red1 (DR1)-doped poly(methylmethacrylate) (PMMA) cladding layer. The resonance wavelength of a GMR mode can be tuned by pumping the cladding layer with a 442 nm wavelength laser beam, because of photoinduced refractive index change in the layer. The resonance wavelength shifts to shorter wavelength side, and the shift increases with pumping power, up to a maximum shift of 5 nm. A detector was used to monitor the intensity of the light that was reflected from the WGS at the wavelengths of the GMR peak positions, and the WGS was found to exhibit optical modulation with a shortest switching time of less than 0.3s.