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Proceedings Paper

Geometric-optical reconstruction of femtosecond hologram in planar optical waveguide
Author(s): A. M. Smolovich; E. Alvarez; S. A. Aseyev; M. A. Cervantes; S. V. Chekalin; A. V. Irzhak; O. B. Serov; V. S. Terpugov
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Paper Abstract

The geometric-optical mechanism of wavefront reconstruction differs significantly from conventional holographic reconstruction. This regime can be realized for holograms containing only few periods of interference fringe structure. The geometric-optical reconstruction of the holograms recorded by femtosecond laser pulses in volume media was demonstrated in our previous works. The large thickness of the recording medium required for the effect observation is a serious obstacle for future development in this direction. In this work a way to surmount this obstacle by realizing the waveguide analog of the geometric-optical reconstruction process is presented. Holograms were recorded by 30-femtosecond laser pulses in 20-μm film of dichromated gelatin on the polished quartz substrate and reconstructed by the waveguide mode. Geometric-optical regime of waveguide hologram reconstruction was obtained: the direction of the reconstructed beam was observed to be constant as the reconstructing wavelength was varied within the hologram spectral selectivity band. The possibility of producing achromatic waveguide optical elements containing only few periods is discussed. The utilization of FIB (focused ion beam) nanotechnology for fabrication of these optical elements is proposed. Production of high aspect ratio periodic structures by FIB technology is demonstrated.

Paper Details

Date Published: 28 June 2007
PDF: 10 pages
Proc. SPIE 6732, International Conference on Lasers, Applications, and Technologies 2007: Laser-assisted Micro- and Nanotechnologies, 67320D (28 June 2007); doi: 10.1117/12.751896
Show Author Affiliations
A. M. Smolovich, Univ. de Sonora (Mexico)
Institute of Radioengineering and Electronics (Russia)
E. Alvarez, Univ. de Sonora (Mexico)
S. A. Aseyev, Institute of Spectroscopy (Russia)
M. A. Cervantes, Univ. de Sonora (Mexico)
S. V. Chekalin, Institute of Spectroscopy (Russia)
A. V. Irzhak, Moscow State Institute of Steel and Alloys (Russia)
O. B. Serov, Institute of Spectroscopy (Russia)
V. S. Terpugov, Institute of Radioengineering and Electronics (Russia)

Published in SPIE Proceedings Vol. 6732:
International Conference on Lasers, Applications, and Technologies 2007: Laser-assisted Micro- and Nanotechnologies
Vladislav Panchenko; Oleg Louchev; Sergei Malyshev, Editor(s)

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