论文信息 - Optical channeling and diffraction in the photorefractive crystals and chalcogenide films

Optical channeling and diffraction in the photorefractive crystals and chalcogenide films

We have studied holographic grating recordings in Fe-doped photorefractive crystals LiNbO3 (LN), in doped As-S-Se chalcogenide glassy semiconductors (CGS), and in CGS based photothermoplastic structures (PTPS). Transmission gratings in a-cut crystals of LN were efficient enough to demonstrate the effect of optical channeling. Volume gratings recorded in LN crystals may be used as a parallel array of the planar waveguides. For CGS, slanted grating geometry was tested, with the goal being the creation of asymmetric blazed gratings. Asymmetry of non-Bragg diffraction orders was observed. For the first time, reflection volume grating were recorded in 2μm thick CGS by green solid-state laser. We have also tested the possibility of single beam contact recording in LN, using CGS with recorded grating as beam-splitter attached to the surface of LN.

[1] J. Hajto,et al. Mechanism of laser-induced optical anisotropy in chalcogenide glasses , 1987 .

[2] Alexander Mishak,et al. Photoinduced instabilities in chalcogenide glasses for optical recording media , 1993 .

[3] S. Elliott,et al. A unified model for reversible photostructural effects in chalcogenide glasses , 1986 .

[4] Anders Grunnet-Jepsen,et al. The Physics and Applications of Photorefractive Materials , 1997 .

[5] T K Gaylord,et al. Antireflection gold surface-relief gratings: experimental characteristics. , 1988, Applied optics.

[6] Yoshihisa Harada,et al. New Blazed Holographic Grating Fabricated By Using An Aspherical Recording With An Ion-Etching Method , 1987, Optics & Photonics.