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Switchable circular beam deflectors

Author
Organization
Project
G.A047.11N
Project
SECONDOS, IWT-nr 120019, 2013–2016
Abstract
In this work, we report two types of electrically tunable photonic devices with circularly symmetric polarization independent beam steering performance (beam condensing resp. beam broadening). The devices consist of circular micro grating structures combined with nematic liquid crystal (LC) layers with anti-parallel alignment. A single beam deflector converts a polarized and monochromatic green laser beam ( = 543.5 nm) into a diffraction pattern, with the peak intensity appearing at the third order when 0Vpp is applied and at the zeroth order (no deflection) for voltages above 30Vpp. Depending on the shape of the grating structure (non-inverted or inverted), the deflection is inwards or outwards. Both grating types can be made starting from the same diamond-tooled master mold. A polarized white light beam is symmetrically condensed resp. broadened over 2° in the off state and is passed through unchanged in the on state. By stacking two such devices with mutually orthogonal LC alignment layers, polarization independent switchable circular beam deflectors are realized with a high transmittance (>80%), and with the same beam steering performance as the polarization dependent single devices.
Keywords
liquid crystal, LIQUID-CRYSTAL, polymer micro structure, soft lithography, beam deflection, LIGHT-MODULATOR, LENS, ALIGNMENT, CELL

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Citation

Please use this url to cite or link to this publication:

MLA
Shang, Xiaobing et al. “Switchable Circular Beam Deflectors.” JOURNAL OF PHYSICS D-APPLIED PHYSICS 49 (2016): 1–10. Print.
APA
Shang, X., Joshi, P., Tan, J. Y., De Smet, J., Cuypers, D., Baghdasaryan, T., Vervaeke, M., et al. (2016). Switchable circular beam deflectors. JOURNAL OF PHYSICS D-APPLIED PHYSICS, 49, 1–10.
Chicago author-date
Shang, Xiaobing, Pankaj Joshi, Jin Yi Tan, Jelle De Smet, Dieter Cuypers, Tigran Baghdasaryan, Michael Vervaeke, Hugo Thienpont, and Herbert De Smet. 2016. “Switchable Circular Beam Deflectors.” Journal of Physics D-applied Physics 49: 1–10.
Chicago author-date (all authors)
Shang, Xiaobing, Pankaj Joshi, Jin Yi Tan, Jelle De Smet, Dieter Cuypers, Tigran Baghdasaryan, Michael Vervaeke, Hugo Thienpont, and Herbert De Smet. 2016. “Switchable Circular Beam Deflectors.” Journal of Physics D-applied Physics 49: 1–10.
Vancouver
1.
Shang X, Joshi P, Tan JY, De Smet J, Cuypers D, Baghdasaryan T, et al. Switchable circular beam deflectors. JOURNAL OF PHYSICS D-APPLIED PHYSICS. UK: IOPscience; 2016;49:1–10.
IEEE
[1]
X. Shang et al., “Switchable circular beam deflectors,” JOURNAL OF PHYSICS D-APPLIED PHYSICS, vol. 49, pp. 1–10, 2016.
@article{7156655,
  abstract     = {In this work, we report two types of electrically tunable photonic devices with circularly symmetric polarization independent beam steering performance (beam condensing resp. beam broadening). The devices consist of circular micro grating structures combined with
nematic liquid crystal (LC) layers with anti-parallel alignment. A single beam deflector converts a polarized and monochromatic green laser beam ( = 543.5 nm) into a diffraction pattern, with the peak intensity appearing at the third order when 0Vpp is applied and at the zeroth order (no deflection) for voltages above 30Vpp. Depending on the shape of the grating structure (non-inverted or inverted), the deflection is inwards or outwards. Both grating types can be made starting from the same diamond-tooled master mold. A polarized white
light beam is symmetrically condensed resp. broadened over 2° in the off state and is passed through unchanged in the on state. By stacking two such devices with mutually orthogonal LC alignment layers, polarization independent switchable circular beam deflectors are realized with a high transmittance (>80%), and with the same beam steering performance as the polarization dependent single devices.},
  articleno    = {165101},
  author       = {Shang, Xiaobing and Joshi, Pankaj and Tan, Jin Yi and De Smet, Jelle and Cuypers, Dieter and Baghdasaryan, Tigran  and Vervaeke, Michael  and Thienpont, Hugo  and De Smet, Herbert},
  issn         = {0022-3727},
  journal      = {JOURNAL OF PHYSICS D-APPLIED PHYSICS},
  keywords     = {liquid crystal,LIQUID-CRYSTAL,polymer micro structure,soft lithography,beam deflection,LIGHT-MODULATOR,LENS,ALIGNMENT,CELL},
  language     = {eng},
  pages        = {165101:1--165101:10},
  publisher    = {IOPscience},
  title        = {Switchable circular beam deflectors},
  url          = {http://dx.doi.org/10.1088/0022-3727/49/16/165101},
  volume       = {49},
  year         = {2016},
}

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