28 February 2011 New holographic method for formation of 2D gratings in photorefractive materials by Bessel standing wave
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Proceedings Volume 7996, Fundamentals of Laser-Assisted Micro- and Nanotechnologies 2010; 799611 (2011) https://doi.org/10.1117/12.887249
Event: Fundamentals of Laser Assisted Micro- and Nanotechnologies 2010, 2010, St. Petersburg, Russian Federation
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.
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Anahit Badalyan, Anahit Badalyan, Ruben Hovsepyan, Ruben Hovsepyan, Vagram Mekhitaryan, Vagram Mekhitaryan, Paytsar Mantashyan, Paytsar Mantashyan, Rafael Drampyan, Rafael Drampyan, } "New holographic method for formation of 2D gratings in photorefractive materials by Bessel standing wave", Proc. SPIE 7996, Fundamentals of Laser-Assisted Micro- and Nanotechnologies 2010, 799611 (28 February 2011); doi: 10.1117/12.887249; https://doi.org/10.1117/12.887249
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