Abstract

The results of investigation of electro-optical properties of porous polyethylene terephthalate films filled with a nematic liquid crystal (5 CB) are presented. It is established that the optical response of the samples on the applied voltage drastically depends on the frequency range. At low frequencies of applied electrical field (f<fc) after the sharp change of the polarity the optical response arises as an impulse of light intensity, which decays for the time essentially shorter than the electric pulse duration. At high frequencies (f>fc) electric field induces an overall change in the light intensity, which is typical for an electro-optical response of a liquid crystal (LC) layer in a conventional “sandwich”-like cell. The dependences of critical frequency fc, threshold voltages, and characteristic times on a pore diameter d were established. The peculiarities of electro-optical effects can be explained in the framework of the approach which connects the variations of light intensity with the corresponding changes of the effective refractive index neff of a composite LC media. The unusual behavior of the electro-optical response at low frequencies is assigned to the orienting action of the specific shear flow typical for electrokinetic phenomena in polar liquids.

© 2014 Optical Society of America

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    [CrossRef]
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    [CrossRef]
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    [CrossRef]
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    [CrossRef]
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    [CrossRef]
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    [CrossRef]
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    [CrossRef]
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    [CrossRef]

2011

R. Ito, T. Kumagai, H. Yoshida, K. Takeya, M. Ozaki, M. Tonouchi, and T. Nose, Mol. Cryst. Liq. Cryst. 543, 77 (2011).

J. G. Cuennet, A. E. Vasdekis, L. De Sio, and D. Psaltis, Nat. Photonics 5, 234 (2011).
[CrossRef]

2010

2008

V. Tkachenko, A. A. Dyomin, G. V. Tkachenko, G. Abbate, and I. A. Sukhoivanov, J. Opt. A 10, 055301 (2008).
[CrossRef]

2007

Y.-H. Cheng, J.-L. Wu, C.-H. Cheng, K.-C. Syao, and M.-C. M. Lee, Appl. Phys. Lett. 90, 091102 (2007).
[CrossRef]

V. A. Bomko, A. D. Burban, A. F. Kobets, A. Kryshtal, I. V. Vorobyova, and B. V. Zajtsev, Funct. Mater. 14, 562 (2007).

2006

M. T. Bryk, A. F. Kobets, A. Kryshtal, I. V. Vorobyova, and B. V. Zajtsev, Nucl. Instrum. Methods Phys. Res., Sect. B 251, 419 (2006).
[CrossRef]

2005

M. S. Park, Y. Lee, and J. K. Kim, Chem. Mater. 17, 3944 (2005).
[CrossRef]

V. A. Tsvetkov, Mol. Cryst. Liq. Cryst. 436, 203/[1157] (2005).
[CrossRef]

2004

V. A. Tsvetkov, S. V. Pasechnik, and J. A. Salov, Mol. Cryst. Liq. Cryst. 409, 483 (2004).
[CrossRef]

1998

Y. Drix, H. Jagt, R. Hikmet, and C. Bastiaansen, Jpn. J. Appl. Phys. 37, 4389 (1998).
[CrossRef]

Abbate, G.

V. Tkachenko, A. A. Dyomin, G. V. Tkachenko, G. Abbate, and I. A. Sukhoivanov, J. Opt. A 10, 055301 (2008).
[CrossRef]

Bastiaansen, C.

Y. Drix, H. Jagt, R. Hikmet, and C. Bastiaansen, Jpn. J. Appl. Phys. 37, 4389 (1998).
[CrossRef]

Bomko, V. A.

V. A. Bomko, A. D. Burban, A. F. Kobets, A. Kryshtal, I. V. Vorobyova, and B. V. Zajtsev, Funct. Mater. 14, 562 (2007).

Bryk, M. T.

M. T. Bryk, A. F. Kobets, A. Kryshtal, I. V. Vorobyova, and B. V. Zajtsev, Nucl. Instrum. Methods Phys. Res., Sect. B 251, 419 (2006).
[CrossRef]

Burban, A. D.

V. A. Bomko, A. D. Burban, A. F. Kobets, A. Kryshtal, I. V. Vorobyova, and B. V. Zajtsev, Funct. Mater. 14, 562 (2007).

Cheng, C.-H.

Y.-H. Cheng, J.-L. Wu, C.-H. Cheng, K.-C. Syao, and M.-C. M. Lee, Appl. Phys. Lett. 90, 091102 (2007).
[CrossRef]

Cheng, Y.-H.

Y.-H. Cheng, J.-L. Wu, C.-H. Cheng, K.-C. Syao, and M.-C. M. Lee, Appl. Phys. Lett. 90, 091102 (2007).
[CrossRef]

Chigrinov, V. G.

D. Semerenko, D. Shmeliova, S. V. Pasechnik, A. Murauskii, V. A. Tsvetkov, and V. G. Chigrinov, Opt. Lett. 35, 2155 (2010).
[CrossRef]

V. G. Chigrinov, Liquid Crystal Devices: Physics and Applications (Artech House, 1999).

Cuennet, J. G.

J. G. Cuennet, A. E. Vasdekis, L. De Sio, and D. Psaltis, Nat. Photonics 5, 234 (2011).
[CrossRef]

De Sio, L.

J. G. Cuennet, A. E. Vasdekis, L. De Sio, and D. Psaltis, Nat. Photonics 5, 234 (2011).
[CrossRef]

Drix, Y.

Y. Drix, H. Jagt, R. Hikmet, and C. Bastiaansen, Jpn. J. Appl. Phys. 37, 4389 (1998).
[CrossRef]

Dunmur, D.

D. Dunmur, Physical Properties of Liquid Crystals: Nematics, D. Dumur, A. Fukuda, and G. Luckhurst, eds. (INSPEC, 2001), pp. 315–332.

Dyomin, A. A.

V. Tkachenko, A. A. Dyomin, G. V. Tkachenko, G. Abbate, and I. A. Sukhoivanov, J. Opt. A 10, 055301 (2008).
[CrossRef]

Hikmet, R.

Y. Drix, H. Jagt, R. Hikmet, and C. Bastiaansen, Jpn. J. Appl. Phys. 37, 4389 (1998).
[CrossRef]

Ito, R.

R. Ito, T. Kumagai, H. Yoshida, K. Takeya, M. Ozaki, M. Tonouchi, and T. Nose, Mol. Cryst. Liq. Cryst. 543, 77 (2011).

Jagt, H.

Y. Drix, H. Jagt, R. Hikmet, and C. Bastiaansen, Jpn. J. Appl. Phys. 37, 4389 (1998).
[CrossRef]

Kemp, T. J.

K. P. Tichomolova and T. J. Kemp, Electro-osmosis (Ellis Horwood Limited, 1993).

Kim, J. K.

M. S. Park, Y. Lee, and J. K. Kim, Chem. Mater. 17, 3944 (2005).
[CrossRef]

Kobets, A. F.

V. A. Bomko, A. D. Burban, A. F. Kobets, A. Kryshtal, I. V. Vorobyova, and B. V. Zajtsev, Funct. Mater. 14, 562 (2007).

M. T. Bryk, A. F. Kobets, A. Kryshtal, I. V. Vorobyova, and B. V. Zajtsev, Nucl. Instrum. Methods Phys. Res., Sect. B 251, 419 (2006).
[CrossRef]

Kryshtal, A.

V. A. Bomko, A. D. Burban, A. F. Kobets, A. Kryshtal, I. V. Vorobyova, and B. V. Zajtsev, Funct. Mater. 14, 562 (2007).

M. T. Bryk, A. F. Kobets, A. Kryshtal, I. V. Vorobyova, and B. V. Zajtsev, Nucl. Instrum. Methods Phys. Res., Sect. B 251, 419 (2006).
[CrossRef]

Kumagai, T.

R. Ito, T. Kumagai, H. Yoshida, K. Takeya, M. Ozaki, M. Tonouchi, and T. Nose, Mol. Cryst. Liq. Cryst. 543, 77 (2011).

Lee, M.-C. M.

Y.-H. Cheng, J.-L. Wu, C.-H. Cheng, K.-C. Syao, and M.-C. M. Lee, Appl. Phys. Lett. 90, 091102 (2007).
[CrossRef]

Lee, Y.

M. S. Park, Y. Lee, and J. K. Kim, Chem. Mater. 17, 3944 (2005).
[CrossRef]

Murauskii, A.

Nose, T.

R. Ito, T. Kumagai, H. Yoshida, K. Takeya, M. Ozaki, M. Tonouchi, and T. Nose, Mol. Cryst. Liq. Cryst. 543, 77 (2011).

Ozaki, M.

R. Ito, T. Kumagai, H. Yoshida, K. Takeya, M. Ozaki, M. Tonouchi, and T. Nose, Mol. Cryst. Liq. Cryst. 543, 77 (2011).

Park, M. S.

M. S. Park, Y. Lee, and J. K. Kim, Chem. Mater. 17, 3944 (2005).
[CrossRef]

Pasechnik, S. V.

Psaltis, D.

J. G. Cuennet, A. E. Vasdekis, L. De Sio, and D. Psaltis, Nat. Photonics 5, 234 (2011).
[CrossRef]

Salov, J. A.

V. A. Tsvetkov, S. V. Pasechnik, and J. A. Salov, Mol. Cryst. Liq. Cryst. 409, 483 (2004).
[CrossRef]

Semerenko, D.

Shmeliova, D.

Sukhoivanov, I. A.

V. Tkachenko, A. A. Dyomin, G. V. Tkachenko, G. Abbate, and I. A. Sukhoivanov, J. Opt. A 10, 055301 (2008).
[CrossRef]

Syao, K.-C.

Y.-H. Cheng, J.-L. Wu, C.-H. Cheng, K.-C. Syao, and M.-C. M. Lee, Appl. Phys. Lett. 90, 091102 (2007).
[CrossRef]

Takeya, K.

R. Ito, T. Kumagai, H. Yoshida, K. Takeya, M. Ozaki, M. Tonouchi, and T. Nose, Mol. Cryst. Liq. Cryst. 543, 77 (2011).

Tichomolova, K. P.

K. P. Tichomolova and T. J. Kemp, Electro-osmosis (Ellis Horwood Limited, 1993).

Tkachenko, G. V.

V. Tkachenko, A. A. Dyomin, G. V. Tkachenko, G. Abbate, and I. A. Sukhoivanov, J. Opt. A 10, 055301 (2008).
[CrossRef]

Tkachenko, V.

V. Tkachenko, A. A. Dyomin, G. V. Tkachenko, G. Abbate, and I. A. Sukhoivanov, J. Opt. A 10, 055301 (2008).
[CrossRef]

Tonouchi, M.

R. Ito, T. Kumagai, H. Yoshida, K. Takeya, M. Ozaki, M. Tonouchi, and T. Nose, Mol. Cryst. Liq. Cryst. 543, 77 (2011).

Tsvetkov, V. A.

D. Semerenko, D. Shmeliova, S. V. Pasechnik, A. Murauskii, V. A. Tsvetkov, and V. G. Chigrinov, Opt. Lett. 35, 2155 (2010).
[CrossRef]

V. A. Tsvetkov, Mol. Cryst. Liq. Cryst. 436, 203/[1157] (2005).
[CrossRef]

V. A. Tsvetkov, S. V. Pasechnik, and J. A. Salov, Mol. Cryst. Liq. Cryst. 409, 483 (2004).
[CrossRef]

Vasdekis, A. E.

J. G. Cuennet, A. E. Vasdekis, L. De Sio, and D. Psaltis, Nat. Photonics 5, 234 (2011).
[CrossRef]

Vorobyova, I. V.

V. A. Bomko, A. D. Burban, A. F. Kobets, A. Kryshtal, I. V. Vorobyova, and B. V. Zajtsev, Funct. Mater. 14, 562 (2007).

M. T. Bryk, A. F. Kobets, A. Kryshtal, I. V. Vorobyova, and B. V. Zajtsev, Nucl. Instrum. Methods Phys. Res., Sect. B 251, 419 (2006).
[CrossRef]

Wu, J.-L.

Y.-H. Cheng, J.-L. Wu, C.-H. Cheng, K.-C. Syao, and M.-C. M. Lee, Appl. Phys. Lett. 90, 091102 (2007).
[CrossRef]

Yoshida, H.

R. Ito, T. Kumagai, H. Yoshida, K. Takeya, M. Ozaki, M. Tonouchi, and T. Nose, Mol. Cryst. Liq. Cryst. 543, 77 (2011).

Zajtsev, B. V.

V. A. Bomko, A. D. Burban, A. F. Kobets, A. Kryshtal, I. V. Vorobyova, and B. V. Zajtsev, Funct. Mater. 14, 562 (2007).

M. T. Bryk, A. F. Kobets, A. Kryshtal, I. V. Vorobyova, and B. V. Zajtsev, Nucl. Instrum. Methods Phys. Res., Sect. B 251, 419 (2006).
[CrossRef]

Appl. Phys. Lett.

Y.-H. Cheng, J.-L. Wu, C.-H. Cheng, K.-C. Syao, and M.-C. M. Lee, Appl. Phys. Lett. 90, 091102 (2007).
[CrossRef]

Chem. Mater.

M. S. Park, Y. Lee, and J. K. Kim, Chem. Mater. 17, 3944 (2005).
[CrossRef]

Funct. Mater.

V. A. Bomko, A. D. Burban, A. F. Kobets, A. Kryshtal, I. V. Vorobyova, and B. V. Zajtsev, Funct. Mater. 14, 562 (2007).

J. Opt. A

V. Tkachenko, A. A. Dyomin, G. V. Tkachenko, G. Abbate, and I. A. Sukhoivanov, J. Opt. A 10, 055301 (2008).
[CrossRef]

Jpn. J. Appl. Phys.

Y. Drix, H. Jagt, R. Hikmet, and C. Bastiaansen, Jpn. J. Appl. Phys. 37, 4389 (1998).
[CrossRef]

Mol. Cryst. Liq. Cryst.

R. Ito, T. Kumagai, H. Yoshida, K. Takeya, M. Ozaki, M. Tonouchi, and T. Nose, Mol. Cryst. Liq. Cryst. 543, 77 (2011).

V. A. Tsvetkov, Mol. Cryst. Liq. Cryst. 436, 203/[1157] (2005).
[CrossRef]

V. A. Tsvetkov, S. V. Pasechnik, and J. A. Salov, Mol. Cryst. Liq. Cryst. 409, 483 (2004).
[CrossRef]

Nat. Photonics

J. G. Cuennet, A. E. Vasdekis, L. De Sio, and D. Psaltis, Nat. Photonics 5, 234 (2011).
[CrossRef]

Nucl. Instrum. Methods Phys. Res., Sect. B

M. T. Bryk, A. F. Kobets, A. Kryshtal, I. V. Vorobyova, and B. V. Zajtsev, Nucl. Instrum. Methods Phys. Res., Sect. B 251, 419 (2006).
[CrossRef]

Opt. Lett.

Other

D. Dunmur, Physical Properties of Liquid Crystals: Nematics, D. Dumur, A. Fukuda, and G. Luckhurst, eds. (INSPEC, 2001), pp. 315–332.

V. G. Chigrinov, Liquid Crystal Devices: Physics and Applications (Artech House, 1999).

K. P. Tichomolova and T. J. Kemp, Electro-osmosis (Ellis Horwood Limited, 1993).

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Figures (4)

Fig. 1.
Fig. 1.

Setup and geometry of the experiment.

Fig. 2.
Fig. 2.

Optical responses of the sample with a pore diameter of 0.3 μm (δ=0, without analyzer) on the applied square wave signals (f=50Hz<fc) for two values of voltage U: (a) U=80V<U*, (b) U=170V>U*. Left inset shows the (b) response in different time scale and right inset shows typical response on application of high-frequency radio pulse (f=5kHz>fc, U=170V).

Fig. 3.
Fig. 3.

Characteristic times (tinc and tdec) of negative peak as functions of a pore diameter. The corresponding dependences of U* and fC are shown in insets.

Fig. 4.
Fig. 4.

Temperature dependences of refractive indices of 5CB and light intensity I(T) for the sample with a pore diameter 0.3 μm filled with LC.

Equations (5)

Equations on this page are rendered with MathJax. Learn more.

neff=1R20R[2εo+(εeεo)sin2Ω(r)]rdr.
τflex=γ1e*qE,
τvρR2η,
τfl=α3α2α3α21u,
τσ=αβ=(ηL4σ)(Rh),

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