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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 7 — Mar. 26, 2012
  • pp: 6870–6880

Optically generated reconfigurable photonic structures of elastic quasiparticles in frustrated cholesteric liquid crystals

Ivan I. Smalyukh, Daniel Kaputa, Aliaksandr V. Kachynski, Andrey N. Kuzmin, Paul J. Ackerman, Christopher W. Twombly, Taewoo Lee, Rahul P. Trivedi, and Paras N. Prasad  »View Author Affiliations


Optics Express, Vol. 20, Issue 7, pp. 6870-6880 (2012)
http://dx.doi.org/10.1364/OE.20.006870


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Abstract

We describe laser-induced two-dimensional periodic photonic structures formed by localized particle-like excitations in an untwisted confined cholesteric liquid crystal. The individual particle-like excitations (dubbed “Torons”) contain three-dimensional twist of the liquid crystal director matched to the uniform background director field by topological point defects. Using both single-beam-steering and holographic pattern generation approaches, the periodic crystal lattices are tailored by tuning their periodicity, reorienting their crystallographic axes, and introducing defects. Moreover, these lattices can be dynamically reconfigurable: generated, modified, erased and then recreated, depending on the needs of a particular photonic application. This robust control is performed by tightly focused laser beams of power 10-100 mW and by low-frequency electric fields at voltages ~10 V applied to the transparent electrodes.

© 2012 OSA

OCIS Codes
(140.7010) Lasers and laser optics : Laser trapping
(160.3710) Materials : Liquid crystals
(180.6900) Microscopy : Three-dimensional microscopy
(190.0190) Nonlinear optics : Nonlinear optics
(050.5298) Diffraction and gratings : Photonic crystals

ToC Category:
Photonic Crystals

History
Original Manuscript: December 14, 2011
Revised Manuscript: February 4, 2012
Manuscript Accepted: February 4, 2012

Citation
Ivan I. Smalyukh, Daniel Kaputa, Aliaksandr V. Kachynski, Andrey N. Kuzmin, Paul J. Ackerman, Christopher W. Twombly, Taewoo Lee, Rahul P. Trivedi, and Paras N. Prasad, "Optically generated reconfigurable photonic structures of elastic quasiparticles in frustrated cholesteric liquid crystals," Opt. Express 20, 6870-6880 (2012)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-20-7-6870


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