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Proceedings Paper

New holographic method for formation of 2D gratings in photorefractive materials by Bessel standing wave
Author(s): Anahit Badalyan; Ruben Hovsepyan; Vagram Mekhitaryan; Paytsar Mantashyan; Rafael Drampyan
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Paper Abstract

A counter-propagating Bessel beam technique is suggested and realized for creation of 2-dimensional (2D) holographic periodic structures (PS) in photorefractive materials. 2D PS formed by the suggested method is a combination of annular and planar gratings. The Bessel beam is formed by optical element - axicon. The recording of the gratings are performed by single mode He-Ne laser beam at 633 nm. The counter-propagating beam geometry builds up the Bessel standing wave with periodic annular structure in each anti-node. The refractive gratings are recorded in Z and Y-cut 2 mm thick Fe doped lithium niobate crystals via electro-optic effect. The read-out of 2D PS is performed by Gaussian and Bessel beams. Diffraction patterns in transmission and reflection are observed. The formed 2D PS have the halfwavelength standing wave period of ~300 nm in longitudinal direction, the period of ~10 μm in radial direction, and up to 10 % diffraction efficiency.

Paper Details

Date Published: 28 February 2011
PDF: 9 pages
Proc. SPIE 7996, Fundamentals of Laser-Assisted Micro- and Nanotechnologies 2010, 799611 (28 February 2011); doi: 10.1117/12.887249
Show Author Affiliations
Anahit Badalyan, Institute for Physical Research (Armenia)
Ruben Hovsepyan, Institute for Physical Research (Armenia)
Vagram Mekhitaryan, Institute for Physical Research (Armenia)
Paytsar Mantashyan, Institute for Physical Research (Armenia)
Rafael Drampyan, Institute for Physical Research (Armenia)

Published in SPIE Proceedings Vol. 7996:
Fundamentals of Laser-Assisted Micro- and Nanotechnologies 2010
Vadim P. Veiko; Tigran A. Vartanyan, Editor(s)

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