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Title: Electrically and spatially controllable PDLC phase gratings for diffraction and modulation of laser beams

Abstract

We present a study on electrically- and spatially-controllable laser beam diffraction, electrooptic (EO) phase modulation, as well as amplitude-frequency EO modulation by single-layer microscale polymer-dispersed liquid crystal (PDLC) phase gratings (PDLC SLPGs) of interest for device applications. PDLC SLPGs were produced from nematic liquid crystal (LC) E7 in photo-curable NOA65 polymer. The wedge-formed PDLC SLPGs have a continuously variable thickness (2–25 µm). They contain LC droplets of diameters twice as the layer thickness, with a linear-gradient size distribution along the wedge. By applying alternating-current (AC) electric field, the PDLC SLPGs produce efficient: (i) diffraction splitting of transmitted laser beams; (ii) spatial redistribution of diffracted light intensity; (iii) optical phase modulation; (iv) amplitude-frequency modulation, all controllable by the driven AC field and the droplet size gradient.

Authors:
 [1]; ;  [2]
  1. Laboratory of Optics and Spectroscopy, Georgi Nadjakov Institute of Solid State Physics, Bulgarian Academy of Sciences, 72 Tzarigradsko Chaussee Blvd., BG-1784 Sofia (Bulgaria)
  2. Laboratory of Biomolecular Layers, Georgi Nadjakov Institute of Solid State Physics, Bulgarian Academy of Sciences, 72 Tzarigradsko Chaussee Blvd., BG-1784 Sofia, Bulgaria (Bulgaria)
Publication Date:
OSTI Identifier:
22591039
Resource Type:
Journal Article
Journal Name:
AIP Conference Proceedings
Additional Journal Information:
Journal Volume: 1722; Journal Issue: 1; Conference: BPU-9: 9. international physics conference of the Balkan Physical Union, Istanbul (Turkey), 24-27 Aug 2015; Other Information: (c) 2016 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0094-243X
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ALTERNATING CURRENT; DIFFRACTION; DROPLETS; ELECTRIC FIELDS; ELECTRO-OPTICAL EFFECTS; FREQUENCY MODULATION; LASER RADIATION; LAYERS; LIQUID CRYSTALS; ORGANIC POLYMERS; VISIBLE RADIATION

Citation Formats

Hadjichristov, Georgi B., E-mail: georgibh@issp.bas.bg, Marinov, Yordan G., and Petrov, Alexander G. Electrically and spatially controllable PDLC phase gratings for diffraction and modulation of laser beams. United States: N. p., 2016. Web. doi:10.1063/1.4944293.
Hadjichristov, Georgi B., E-mail: georgibh@issp.bas.bg, Marinov, Yordan G., & Petrov, Alexander G. Electrically and spatially controllable PDLC phase gratings for diffraction and modulation of laser beams. United States. doi:10.1063/1.4944293.
Hadjichristov, Georgi B., E-mail: georgibh@issp.bas.bg, Marinov, Yordan G., and Petrov, Alexander G. Fri . "Electrically and spatially controllable PDLC phase gratings for diffraction and modulation of laser beams". United States. doi:10.1063/1.4944293.
@article{osti_22591039,
title = {Electrically and spatially controllable PDLC phase gratings for diffraction and modulation of laser beams},
author = {Hadjichristov, Georgi B., E-mail: georgibh@issp.bas.bg and Marinov, Yordan G. and Petrov, Alexander G.},
abstractNote = {We present a study on electrically- and spatially-controllable laser beam diffraction, electrooptic (EO) phase modulation, as well as amplitude-frequency EO modulation by single-layer microscale polymer-dispersed liquid crystal (PDLC) phase gratings (PDLC SLPGs) of interest for device applications. PDLC SLPGs were produced from nematic liquid crystal (LC) E7 in photo-curable NOA65 polymer. The wedge-formed PDLC SLPGs have a continuously variable thickness (2–25 µm). They contain LC droplets of diameters twice as the layer thickness, with a linear-gradient size distribution along the wedge. By applying alternating-current (AC) electric field, the PDLC SLPGs produce efficient: (i) diffraction splitting of transmitted laser beams; (ii) spatial redistribution of diffracted light intensity; (iii) optical phase modulation; (iv) amplitude-frequency modulation, all controllable by the driven AC field and the droplet size gradient.},
doi = {10.1063/1.4944293},
journal = {AIP Conference Proceedings},
issn = {0094-243X},
number = 1,
volume = 1722,
place = {United States},
year = {2016},
month = {3}
}