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Proceedings Paper

Trapping of dielectric microparticles on iron-doped lithium niobate crystal by optical Bessel beam-induced space-charge field
Author(s): Lusine M. Tsarukyan; Anahit M. Badalyan; Ruben K. Hovsepyan; Rafael Kh. Drampyan
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Paper Abstract

We report the trapping of dielectric micro-particles of CaCO3 via dielectrophoretic forces on the surface of Fe doped LiNbO3 (LN:Fe) crystal with recorded volume holographic grating which provides quasi-periodic space-charge electric field distribution on the crystal surface. The non-diffracting Bessel beam approach was used for optical induction of holographic grating by 20÷40 mW power Bessel beam at 532 nm wavelength in photorefractive Y-cut LN:Fe crystal providing the Bessel lattice periodicity of ~40 m and hologram size on the crystal surface of 4 mm. This approach provides the induction of high contrast 2D periodic distribution of electric field on the crystal surface and high quality 2D patterning of microparticles. The particles are trapped on the crystal surface in the areas of refractive index maxima of the Bessel lattice. The physical model was developed to explain the experimental results. The photovoltaic approach of trapping and manipulation of micro- and nanoparticles is promising for applications in photonics, integrated optics and biotechnology.

Paper Details

Date Published: 1 April 2020
PDF: 9 pages
Proc. SPIE 11367, Photosensitive Materials and their Applications, 113671B (1 April 2020); doi: 10.1117/12.2553060
Show Author Affiliations
Lusine M. Tsarukyan, Institute for Physical Research (Armenia)
Anahit M. Badalyan, Institute for Physical Research (Armenia)
Ruben K. Hovsepyan, Institute for Physical Research (Armenia)
Rafael Kh. Drampyan, Institute for Physical Research (Armenia)

Published in SPIE Proceedings Vol. 11367:
Photosensitive Materials and their Applications
Robert R. McLeod; Inmaculada Pascual Villalobos; Yasuo Tomita; John T. Sheridan, Editor(s)

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