Journal of Optics A Pure and Applied Optics, volume 11, issue 10, pages 105106
Tunable NIR filter based on a free-standing porous silicon film containing nematic liquid crystal
Publication type: Journal Article
Publication date: 2009-08-14
Quartile SCImago
— Quartile WOS
—
Impact factor: —
ISSN: 14644258, 17413567
Atomic and Molecular Physics, and Optics
Abstract
We present the design of a thermally tunable interference filter for the NIR range. The filter is based on a free-standing porous silicon multilayer filled with the nematic liquid crystal mixture E7. The porous silicon stack is constituted by a quarter-wave microcavity sandwiched between two distributed Bragg reflectors. Reversible thermal tuning of the microcavity resonance is obtained in the range of 13 nm. Thermal dependence of the effective refractive index of the liquid crystal in the sample is characterized using variable angle spectroscopic ellipsometry. The non-axial liquid crystal director configuration is found inside silicon mesopores. The distribution of the liquid crystal director within pores is simulated using the Frank's free energy approach. Assuming the molecular configuration of the liquid crystal to be escaped radial, we have determined the value of the surface anchoring strength in the mesoporous silicon to be less than 10−6 J m−2. By fitting the transmittance spectra, using an effective medium approximation and a transfer matrix method, the liquid crystal is found to fill 84% of the void inside the porous sample. The good agreement between the experimental data and the theoretical curves justifies the Frank's approach and the hypothesis of escape radial configuration of nematics confined in silicon mesopores.
Citations by journals
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2
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Applied Physics Letters
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Applied Physics Letters
2 publications, 22.22%
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Advanced Optical Materials
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Advanced Optical Materials
1 publication, 11.11%
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Journal of Applied Physics
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Journal of Applied Physics
1 publication, 11.11%
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Optical Materials
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Optical Materials
1 publication, 11.11%
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ACS Nano
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ACS Nano
1 publication, 11.11%
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2
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Citations by publishers
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1
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3
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American Institute of Physics (AIP)
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American Institute of Physics (AIP)
3 publications, 33.33%
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Wiley
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Wiley
1 publication, 11.11%
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Elsevier
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Elsevier
1 publication, 11.11%
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American Chemical Society (ACS)
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American Chemical Society (ACS)
1 publication, 11.11%
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1
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- We do not take into account publications that without a DOI.
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Tkachenko G. V. et al. Tunable NIR filter based on a free-standing porous silicon film containing nematic liquid crystal // Journal of Optics A Pure and Applied Optics. 2009. Vol. 11. No. 10. p. 105106.
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Tkachenko G. V., Tkachenko V., Stefano L. D., Sukhoivanov I. A. Tunable NIR filter based on a free-standing porous silicon film containing nematic liquid crystal // Journal of Optics A Pure and Applied Optics. 2009. Vol. 11. No. 10. p. 105106.
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TY - JOUR
DO - 10.1088/1464-4258/11/10/105106
UR - https://doi.org/10.1088%2F1464-4258%2F11%2F10%2F105106
TI - Tunable NIR filter based on a free-standing porous silicon film containing nematic liquid crystal
T2 - Journal of Optics A Pure and Applied Optics
AU - Tkachenko, Georgiy V
AU - Tkachenko, Volodymyr
AU - Stefano, Luca De
AU - Sukhoivanov, Igor A
PY - 2009
DA - 2009/08/14 00:00:00
PB - IOP Publishing
SP - 105106
IS - 10
VL - 11
SN - 1464-4258
SN - 1741-3567
ER -
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@article{2009_Tkachenko,
author = {Georgiy V Tkachenko and Volodymyr Tkachenko and Luca De Stefano and Igor A Sukhoivanov},
title = {Tunable NIR filter based on a free-standing porous silicon film containing nematic liquid crystal},
journal = {Journal of Optics A Pure and Applied Optics},
year = {2009},
volume = {11},
publisher = {IOP Publishing},
month = {aug},
url = {https://doi.org/10.1088%2F1464-4258%2F11%2F10%2F105106},
number = {10},
pages = {105106},
doi = {10.1088/1464-4258/11/10/105106}
}
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Tkachenko, Georgiy V., et al. “Tunable NIR filter based on a free-standing porous silicon film containing nematic liquid crystal.” Journal of Optics A Pure and Applied Optics, vol. 11, no. 10, Aug. 2009, p. 105106. https://doi.org/10.1088%2F1464-4258%2F11%2F10%2F105106.