Surface-relief gratings polarization dependence

Jiang, X. L., Kumar, J., Kim, D. Y, Shivshankar, V., and Tripathy, S. K. Polarization dependent recordings of surface relief gratings on azobenzene containing p[Pg.481]

Tripathy, S. K., Viswanathan, N., Balasubramanian, S., Bian, S., Li, L., and Kumar, J. Polarization dependent holographic write, read and erasure of surface relief gratings on azopolymer films, in Multiphoton and Light Driven Multielectron Processes in Organics New Phenomena, Materials and Applications, pp. 421-436, eds R Kajzar and M. V. Agranovich, 2000 Kluwer Academic Publishers, Netherlands. 

Jiang XL, Li L, Kumar J, Kim DY, Tripathy SK. 1998. Unusual polarization dependent optical erasure of surface relief gratings on azobenzene polymer films. Appl Phys Lett... 

Viswanathan NK, Balasubramanian S, Li L, Tripathy SK, Kumar J. 1999a. A detailed investigation of the polarization dependent surface relief grating formation process on azo pol5mer films. Jpn J Appl Phys 1 38(10) 5928 5937. 

In order to produce surface-relief electro-optic gratings, Munakata et compared two fabrication methods of SRG inscription. In the first, the SRG was produced with an interference pattern of cw laser, with relatively modest intensities. The gratings so recorded were photo- and thermally erasable, and efficient writing was polarization dependent. In the second method, a phase mask was employed to provide the periodic intensity modulation of a pulsed laser, the 3rd-order harmonic (at 355 nm) of a Nd YAG laser. The SRG was produced with a single laser pulse, allowing a very short fabrication time (less than Is). The direshold for ablation was 500 mj/(em pulse), and the amplitude of the SRG increased with pulse energy. A depth of up to 300 rim could be achieved, leading to a smooth but not sinusoidal surface modulation. 

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