title: Optical modulation of guided mode resonance in the waveguide grating structure incorporated with azo-doped-poly(methylmethacrylate) cladding layer.
abstract: 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.
authors.affiliation: Department of Physics, National Chung Cheng University, Ming Hsiung, Chia Yi 621, Taiwan.
authors.forename: Jian Hung
authors.initials: JH
authors.lastname: Lin
authors.forename: Yu Chung
authors.initials: YC
authors.lastname: Huang
authors.forename: Ngoc
authors.initials: N
authors.lastname: DiepLai
authors.forename: Hung-Chih
authors.initials: HC
authors.lastname: Kan
authors.forename: Chia Chen
authors.initials: CC
authors.lastname: Hsu
mesh_terms: D001391:Azo Compounds / Q000737:chemistry*; D003198:Computer Simulation; D017076:Computer-Aided Design; D004867:Equipment Design; D019544:Equipment Failure Analysis; D008027:Light; D008962:Models, Theoretical; D055096:Optical Devices; D019904:Polymethyl Methacrylate / Q000737:chemistry*; D012031:Refractometry / Q000295:instrumentation*; D012542:Scattering, Radiation; D020349:Surface Plasmon Resonance / Q000295:instrumentation*; D013685:Telecommunications / Q000295:instrumentation*
chemical_list: D001391:Azo Compounds; D019904:Polymethyl Methacrylate