Abstract

A new kind of device made by the insertion of a nematic liquid-crystal layer between two polymeric sheets with rough surfaces is presented and discussed. The device is experimentally shown to have the same optical behavior as polymer-dispersed liquid-crystal (PDLC) films. The optical behavior as a function of temperature and of the applied electric field is experimentally studied. A first quantitative study is performed by the use of a mathematical model originally introduced for PDLC’s.

© 1999 Optical Society of America

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References

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  1. J. W. Doane, N. A. Vaz, B. G. Wu, and S. Zumer, “Field controlled light scattering from nematic microdroplets,” Appl. Phys. Lett. 48, 269–271 (1986).
    [CrossRef]
  2. F. Bloisi, C. Ruocchio, P. Terrecuso, and L. Vicari, “Optoelectronic polarizer by PDLC,” Liq. Cryst. 20, 377–379 (1996).
    [CrossRef]
  3. F. Bloisi, C. Ruocchio, and L. Vicari, “Temperature dependence of light transmittance in polymer dispersed liquid crystals,” J. Phys. III 7, 1097–1102 (1997).
  4. F. Basile, F. Bloisi, L. Vicari, and F. Simoni, “Temperature dependence of the optical phase shift in a polymer dispersed liquid crystal,” Mol. Cryst. Liq. Cryst. 251, 271–281 (1994).
    [CrossRef]
  5. F. Bloisi, C. Ruocchio, P. Terrecuso, and L. Vicari, “PDLC: influence of droplet order parameter in light transmittance,” Opt. Commun. 123, 449–452 (1996).
    [CrossRef]
  6. F. Bloisi, C. Ruocchio, P. Terrecuso, and L. Vicari, “Angular dependence of light transmittance in polymer dispersed liquid crystals,” Phys. Rev. E 54, 5242–5248 (1996).
    [CrossRef]
  7. F. Basile, F. Bloisi, L. Vicari, and F. Simoni, “Optical phaseshift of polymer dispersed liquid crystals,” Phys. Rev. E 48, 432–438 (1993).
    [CrossRef]
  8. L. Vicari, “Voltage controlled thermo-optical effect in polymer dispersed liquid crystal,” Mol. Cryst. Liq. Cryst. 320, 379–388 (1998).
    [CrossRef]
  9. S. Zumer, “Light scattering from nematic droplets: anomalous diffraction approach,” Phys. Rev. A 37, 4006–4015 (1988).
    [CrossRef] [PubMed]
  10. W. H. de Jeu, Physical Properties of Liquid Crystalline Materials (Gordon & Breach, New York, 1979).
  11. P. G. de Gennes and J. Prost, The Physics of Liquid Crystals (Clarendon, Oxford, 1993); J. L. West, “Phase separation of liquid crystals in polymers,” Mol. Cryst. Liq. Cryst. Inc. Nonlin. Opt. 157, 427–441 (1988).

1998 (1)

L. Vicari, “Voltage controlled thermo-optical effect in polymer dispersed liquid crystal,” Mol. Cryst. Liq. Cryst. 320, 379–388 (1998).
[CrossRef]

1997 (1)

F. Bloisi, C. Ruocchio, and L. Vicari, “Temperature dependence of light transmittance in polymer dispersed liquid crystals,” J. Phys. III 7, 1097–1102 (1997).

1996 (3)

F. Bloisi, C. Ruocchio, P. Terrecuso, and L. Vicari, “Optoelectronic polarizer by PDLC,” Liq. Cryst. 20, 377–379 (1996).
[CrossRef]

F. Bloisi, C. Ruocchio, P. Terrecuso, and L. Vicari, “PDLC: influence of droplet order parameter in light transmittance,” Opt. Commun. 123, 449–452 (1996).
[CrossRef]

F. Bloisi, C. Ruocchio, P. Terrecuso, and L. Vicari, “Angular dependence of light transmittance in polymer dispersed liquid crystals,” Phys. Rev. E 54, 5242–5248 (1996).
[CrossRef]

1994 (1)

F. Basile, F. Bloisi, L. Vicari, and F. Simoni, “Temperature dependence of the optical phase shift in a polymer dispersed liquid crystal,” Mol. Cryst. Liq. Cryst. 251, 271–281 (1994).
[CrossRef]

1993 (1)

F. Basile, F. Bloisi, L. Vicari, and F. Simoni, “Optical phaseshift of polymer dispersed liquid crystals,” Phys. Rev. E 48, 432–438 (1993).
[CrossRef]

1988 (1)

S. Zumer, “Light scattering from nematic droplets: anomalous diffraction approach,” Phys. Rev. A 37, 4006–4015 (1988).
[CrossRef] [PubMed]

1986 (1)

J. W. Doane, N. A. Vaz, B. G. Wu, and S. Zumer, “Field controlled light scattering from nematic microdroplets,” Appl. Phys. Lett. 48, 269–271 (1986).
[CrossRef]

Basile, F.

F. Basile, F. Bloisi, L. Vicari, and F. Simoni, “Temperature dependence of the optical phase shift in a polymer dispersed liquid crystal,” Mol. Cryst. Liq. Cryst. 251, 271–281 (1994).
[CrossRef]

F. Basile, F. Bloisi, L. Vicari, and F. Simoni, “Optical phaseshift of polymer dispersed liquid crystals,” Phys. Rev. E 48, 432–438 (1993).
[CrossRef]

Bloisi, F.

F. Bloisi, C. Ruocchio, and L. Vicari, “Temperature dependence of light transmittance in polymer dispersed liquid crystals,” J. Phys. III 7, 1097–1102 (1997).

F. Bloisi, C. Ruocchio, P. Terrecuso, and L. Vicari, “PDLC: influence of droplet order parameter in light transmittance,” Opt. Commun. 123, 449–452 (1996).
[CrossRef]

F. Bloisi, C. Ruocchio, P. Terrecuso, and L. Vicari, “Optoelectronic polarizer by PDLC,” Liq. Cryst. 20, 377–379 (1996).
[CrossRef]

F. Bloisi, C. Ruocchio, P. Terrecuso, and L. Vicari, “Angular dependence of light transmittance in polymer dispersed liquid crystals,” Phys. Rev. E 54, 5242–5248 (1996).
[CrossRef]

F. Basile, F. Bloisi, L. Vicari, and F. Simoni, “Temperature dependence of the optical phase shift in a polymer dispersed liquid crystal,” Mol. Cryst. Liq. Cryst. 251, 271–281 (1994).
[CrossRef]

F. Basile, F. Bloisi, L. Vicari, and F. Simoni, “Optical phaseshift of polymer dispersed liquid crystals,” Phys. Rev. E 48, 432–438 (1993).
[CrossRef]

Doane, J. W.

J. W. Doane, N. A. Vaz, B. G. Wu, and S. Zumer, “Field controlled light scattering from nematic microdroplets,” Appl. Phys. Lett. 48, 269–271 (1986).
[CrossRef]

Ruocchio, C.

F. Bloisi, C. Ruocchio, and L. Vicari, “Temperature dependence of light transmittance in polymer dispersed liquid crystals,” J. Phys. III 7, 1097–1102 (1997).

F. Bloisi, C. Ruocchio, P. Terrecuso, and L. Vicari, “PDLC: influence of droplet order parameter in light transmittance,” Opt. Commun. 123, 449–452 (1996).
[CrossRef]

F. Bloisi, C. Ruocchio, P. Terrecuso, and L. Vicari, “Optoelectronic polarizer by PDLC,” Liq. Cryst. 20, 377–379 (1996).
[CrossRef]

F. Bloisi, C. Ruocchio, P. Terrecuso, and L. Vicari, “Angular dependence of light transmittance in polymer dispersed liquid crystals,” Phys. Rev. E 54, 5242–5248 (1996).
[CrossRef]

Simoni, F.

F. Basile, F. Bloisi, L. Vicari, and F. Simoni, “Temperature dependence of the optical phase shift in a polymer dispersed liquid crystal,” Mol. Cryst. Liq. Cryst. 251, 271–281 (1994).
[CrossRef]

F. Basile, F. Bloisi, L. Vicari, and F. Simoni, “Optical phaseshift of polymer dispersed liquid crystals,” Phys. Rev. E 48, 432–438 (1993).
[CrossRef]

Terrecuso, P.

F. Bloisi, C. Ruocchio, P. Terrecuso, and L. Vicari, “Angular dependence of light transmittance in polymer dispersed liquid crystals,” Phys. Rev. E 54, 5242–5248 (1996).
[CrossRef]

F. Bloisi, C. Ruocchio, P. Terrecuso, and L. Vicari, “Optoelectronic polarizer by PDLC,” Liq. Cryst. 20, 377–379 (1996).
[CrossRef]

F. Bloisi, C. Ruocchio, P. Terrecuso, and L. Vicari, “PDLC: influence of droplet order parameter in light transmittance,” Opt. Commun. 123, 449–452 (1996).
[CrossRef]

Vaz, N. A.

J. W. Doane, N. A. Vaz, B. G. Wu, and S. Zumer, “Field controlled light scattering from nematic microdroplets,” Appl. Phys. Lett. 48, 269–271 (1986).
[CrossRef]

Vicari, L.

L. Vicari, “Voltage controlled thermo-optical effect in polymer dispersed liquid crystal,” Mol. Cryst. Liq. Cryst. 320, 379–388 (1998).
[CrossRef]

F. Bloisi, C. Ruocchio, and L. Vicari, “Temperature dependence of light transmittance in polymer dispersed liquid crystals,” J. Phys. III 7, 1097–1102 (1997).

F. Bloisi, C. Ruocchio, P. Terrecuso, and L. Vicari, “PDLC: influence of droplet order parameter in light transmittance,” Opt. Commun. 123, 449–452 (1996).
[CrossRef]

F. Bloisi, C. Ruocchio, P. Terrecuso, and L. Vicari, “Optoelectronic polarizer by PDLC,” Liq. Cryst. 20, 377–379 (1996).
[CrossRef]

F. Bloisi, C. Ruocchio, P. Terrecuso, and L. Vicari, “Angular dependence of light transmittance in polymer dispersed liquid crystals,” Phys. Rev. E 54, 5242–5248 (1996).
[CrossRef]

F. Basile, F. Bloisi, L. Vicari, and F. Simoni, “Temperature dependence of the optical phase shift in a polymer dispersed liquid crystal,” Mol. Cryst. Liq. Cryst. 251, 271–281 (1994).
[CrossRef]

F. Basile, F. Bloisi, L. Vicari, and F. Simoni, “Optical phaseshift of polymer dispersed liquid crystals,” Phys. Rev. E 48, 432–438 (1993).
[CrossRef]

Wu, B. G.

J. W. Doane, N. A. Vaz, B. G. Wu, and S. Zumer, “Field controlled light scattering from nematic microdroplets,” Appl. Phys. Lett. 48, 269–271 (1986).
[CrossRef]

Zumer, S.

S. Zumer, “Light scattering from nematic droplets: anomalous diffraction approach,” Phys. Rev. A 37, 4006–4015 (1988).
[CrossRef] [PubMed]

J. W. Doane, N. A. Vaz, B. G. Wu, and S. Zumer, “Field controlled light scattering from nematic microdroplets,” Appl. Phys. Lett. 48, 269–271 (1986).
[CrossRef]

Appl. Phys. Lett. (1)

J. W. Doane, N. A. Vaz, B. G. Wu, and S. Zumer, “Field controlled light scattering from nematic microdroplets,” Appl. Phys. Lett. 48, 269–271 (1986).
[CrossRef]

J. Phys. III (1)

F. Bloisi, C. Ruocchio, and L. Vicari, “Temperature dependence of light transmittance in polymer dispersed liquid crystals,” J. Phys. III 7, 1097–1102 (1997).

Liq. Cryst. (1)

F. Bloisi, C. Ruocchio, P. Terrecuso, and L. Vicari, “Optoelectronic polarizer by PDLC,” Liq. Cryst. 20, 377–379 (1996).
[CrossRef]

Mol. Cryst. Liq. Cryst. (2)

F. Basile, F. Bloisi, L. Vicari, and F. Simoni, “Temperature dependence of the optical phase shift in a polymer dispersed liquid crystal,” Mol. Cryst. Liq. Cryst. 251, 271–281 (1994).
[CrossRef]

L. Vicari, “Voltage controlled thermo-optical effect in polymer dispersed liquid crystal,” Mol. Cryst. Liq. Cryst. 320, 379–388 (1998).
[CrossRef]

Opt. Commun. (1)

F. Bloisi, C. Ruocchio, P. Terrecuso, and L. Vicari, “PDLC: influence of droplet order parameter in light transmittance,” Opt. Commun. 123, 449–452 (1996).
[CrossRef]

Phys. Rev. A (1)

S. Zumer, “Light scattering from nematic droplets: anomalous diffraction approach,” Phys. Rev. A 37, 4006–4015 (1988).
[CrossRef] [PubMed]

Phys. Rev. E (2)

F. Bloisi, C. Ruocchio, P. Terrecuso, and L. Vicari, “Angular dependence of light transmittance in polymer dispersed liquid crystals,” Phys. Rev. E 54, 5242–5248 (1996).
[CrossRef]

F. Basile, F. Bloisi, L. Vicari, and F. Simoni, “Optical phaseshift of polymer dispersed liquid crystals,” Phys. Rev. E 48, 432–438 (1993).
[CrossRef]

Other (2)

W. H. de Jeu, Physical Properties of Liquid Crystalline Materials (Gordon & Breach, New York, 1979).

P. G. de Gennes and J. Prost, The Physics of Liquid Crystals (Clarendon, Oxford, 1993); J. L. West, “Phase separation of liquid crystals in polymers,” Mol. Cryst. Liq. Cryst. Inc. Nonlin. Opt. 157, 427–441 (1988).

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Figures (3)

Fig. 1
Fig. 1

(a) Normal PDLC sample; (b) single-layer PDLC sample, (c) our sample.

Fig. 2
Fig. 2

Experimental values of the sample transmission ratio τ=I/I0 versus temperature compared with theoretical results (solid curve) in the absence of applied voltage.

Fig. 3
Fig. 3

Experimental values of the sample transmission ratio τ=I/I0 versus applied voltage at fixed temperature (T=20.8 °C).

Equations (9)

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

σ=πRd224πλRd2nde-ndonp2np-ndonde-ndo2-23np-ndonde-ndo+415,
ndo=2πnoFπ2,1ne[2/3(ne2-no2)(1-Sd)]1/2,
nde=none[2/3(no2-ne2)Sd+1/3(no2+2ne2)]1/2,
I/I0=exp(-Nsσ),
ne2=C1+2C2S,
no2=C1-C2S,
S=P2(nˆ·lˆ);
S=(1-0.98τ)0.22
τ=T/TNI.

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