Abstract

We report an electrical-field switched color device using a polymer-stabilized blue-phase (PSBP) liquid crystal in which the Bragg-reflected color of the blue phase (BP) can be switched to reflect a second color. The phase-separated three-dimensional polymer network transcribes the cubic structure of a BP liquid crystal and restrains the deformation of cubic lattice by the external electric field. The new wide-range electric-field switched colors with PSBP may be an important step toward ecofriendly color reflective displays.

© 2010 Optical Society of America

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  1. P. P. Crooker, in Chiarality in Liquid CrystalsH.-S.Kitzerow and C.Bahr, eds. (Springer, 2001), pp. 186-222
    [CrossRef]
  2. D. L. Johnson, J. H. Flack, and P. P. Crooker, Phys. Rev. Lett. 45, 641 (1981).
    [CrossRef]
  3. D. C. Wright and N. D. Mermin, Rev. Mod. Phys. 61, 385 (1989).
    [CrossRef]
  4. J. Yamamoto, Nishiyama, M. Inoue, and H. Yokoyama, Nature 437, 525 (2005).
    [CrossRef] [PubMed]
  5. G. Heppke, M. Krumrey, and F. Oestreicher, Mol. Cryst. Liq. Cryst. 99, 99 (1983).
    [CrossRef]
  6. H. J. Cole and M. N. Pivenko, Nature 436, 997 (2005).
    [CrossRef]
  7. H. Kikuchi, M. Yokota, Y. Hisakado, H. Yang, and T. Kajiyama, Nature Mater. 1, 64 (2002).
    [CrossRef]
  8. P. R. Gerber, Mol. Cryst. Liq. Cryst. 116, 197-206 (1985).
    [CrossRef]
  9. S.-Y. Lu and L.-C. Chien, Appl. Phys. Lett. 91, 131119 (2007).
    [CrossRef]
  10. G. Heppke, B. Jerome, H. S. Kitzerow, and P. Pieranski, J. Phys. (Paris) 50, 549 (1989).
    [CrossRef]

2007 (1)

S.-Y. Lu and L.-C. Chien, Appl. Phys. Lett. 91, 131119 (2007).
[CrossRef]

2005 (2)

H. J. Cole and M. N. Pivenko, Nature 436, 997 (2005).
[CrossRef]

J. Yamamoto, Nishiyama, M. Inoue, and H. Yokoyama, Nature 437, 525 (2005).
[CrossRef] [PubMed]

2002 (1)

H. Kikuchi, M. Yokota, Y. Hisakado, H. Yang, and T. Kajiyama, Nature Mater. 1, 64 (2002).
[CrossRef]

1989 (2)

G. Heppke, B. Jerome, H. S. Kitzerow, and P. Pieranski, J. Phys. (Paris) 50, 549 (1989).
[CrossRef]

D. C. Wright and N. D. Mermin, Rev. Mod. Phys. 61, 385 (1989).
[CrossRef]

1985 (1)

P. R. Gerber, Mol. Cryst. Liq. Cryst. 116, 197-206 (1985).
[CrossRef]

1983 (1)

G. Heppke, M. Krumrey, and F. Oestreicher, Mol. Cryst. Liq. Cryst. 99, 99 (1983).
[CrossRef]

1981 (1)

D. L. Johnson, J. H. Flack, and P. P. Crooker, Phys. Rev. Lett. 45, 641 (1981).
[CrossRef]

Chien, L.-C.

S.-Y. Lu and L.-C. Chien, Appl. Phys. Lett. 91, 131119 (2007).
[CrossRef]

Cole, H. J.

H. J. Cole and M. N. Pivenko, Nature 436, 997 (2005).
[CrossRef]

Crooker, P. P.

D. L. Johnson, J. H. Flack, and P. P. Crooker, Phys. Rev. Lett. 45, 641 (1981).
[CrossRef]

P. P. Crooker, in Chiarality in Liquid CrystalsH.-S.Kitzerow and C.Bahr, eds. (Springer, 2001), pp. 186-222
[CrossRef]

Flack, J. H.

D. L. Johnson, J. H. Flack, and P. P. Crooker, Phys. Rev. Lett. 45, 641 (1981).
[CrossRef]

Gerber, P. R.

P. R. Gerber, Mol. Cryst. Liq. Cryst. 116, 197-206 (1985).
[CrossRef]

Heppke, G.

G. Heppke, B. Jerome, H. S. Kitzerow, and P. Pieranski, J. Phys. (Paris) 50, 549 (1989).
[CrossRef]

G. Heppke, M. Krumrey, and F. Oestreicher, Mol. Cryst. Liq. Cryst. 99, 99 (1983).
[CrossRef]

Hisakado, Y.

H. Kikuchi, M. Yokota, Y. Hisakado, H. Yang, and T. Kajiyama, Nature Mater. 1, 64 (2002).
[CrossRef]

Inoue, M.

J. Yamamoto, Nishiyama, M. Inoue, and H. Yokoyama, Nature 437, 525 (2005).
[CrossRef] [PubMed]

Jerome, B.

G. Heppke, B. Jerome, H. S. Kitzerow, and P. Pieranski, J. Phys. (Paris) 50, 549 (1989).
[CrossRef]

Johnson, D. L.

D. L. Johnson, J. H. Flack, and P. P. Crooker, Phys. Rev. Lett. 45, 641 (1981).
[CrossRef]

Kajiyama, T.

H. Kikuchi, M. Yokota, Y. Hisakado, H. Yang, and T. Kajiyama, Nature Mater. 1, 64 (2002).
[CrossRef]

Kikuchi, H.

H. Kikuchi, M. Yokota, Y. Hisakado, H. Yang, and T. Kajiyama, Nature Mater. 1, 64 (2002).
[CrossRef]

Kitzerow, H. S.

G. Heppke, B. Jerome, H. S. Kitzerow, and P. Pieranski, J. Phys. (Paris) 50, 549 (1989).
[CrossRef]

Krumrey, M.

G. Heppke, M. Krumrey, and F. Oestreicher, Mol. Cryst. Liq. Cryst. 99, 99 (1983).
[CrossRef]

Lu, S.-Y.

S.-Y. Lu and L.-C. Chien, Appl. Phys. Lett. 91, 131119 (2007).
[CrossRef]

Mermin, N. D.

D. C. Wright and N. D. Mermin, Rev. Mod. Phys. 61, 385 (1989).
[CrossRef]

Nishiyama,

J. Yamamoto, Nishiyama, M. Inoue, and H. Yokoyama, Nature 437, 525 (2005).
[CrossRef] [PubMed]

Oestreicher, F.

G. Heppke, M. Krumrey, and F. Oestreicher, Mol. Cryst. Liq. Cryst. 99, 99 (1983).
[CrossRef]

Pieranski, P.

G. Heppke, B. Jerome, H. S. Kitzerow, and P. Pieranski, J. Phys. (Paris) 50, 549 (1989).
[CrossRef]

Pivenko, M. N.

H. J. Cole and M. N. Pivenko, Nature 436, 997 (2005).
[CrossRef]

Wright, D. C.

D. C. Wright and N. D. Mermin, Rev. Mod. Phys. 61, 385 (1989).
[CrossRef]

Yamamoto, J.

J. Yamamoto, Nishiyama, M. Inoue, and H. Yokoyama, Nature 437, 525 (2005).
[CrossRef] [PubMed]

Yang, H.

H. Kikuchi, M. Yokota, Y. Hisakado, H. Yang, and T. Kajiyama, Nature Mater. 1, 64 (2002).
[CrossRef]

Yokota, M.

H. Kikuchi, M. Yokota, Y. Hisakado, H. Yang, and T. Kajiyama, Nature Mater. 1, 64 (2002).
[CrossRef]

Yokoyama, H.

J. Yamamoto, Nishiyama, M. Inoue, and H. Yokoyama, Nature 437, 525 (2005).
[CrossRef] [PubMed]

Appl. Phys. Lett. (1)

S.-Y. Lu and L.-C. Chien, Appl. Phys. Lett. 91, 131119 (2007).
[CrossRef]

J. Phys. (Paris) (1)

G. Heppke, B. Jerome, H. S. Kitzerow, and P. Pieranski, J. Phys. (Paris) 50, 549 (1989).
[CrossRef]

Mol. Cryst. Liq. Cryst. (2)

G. Heppke, M. Krumrey, and F. Oestreicher, Mol. Cryst. Liq. Cryst. 99, 99 (1983).
[CrossRef]

P. R. Gerber, Mol. Cryst. Liq. Cryst. 116, 197-206 (1985).
[CrossRef]

Nature (2)

H. J. Cole and M. N. Pivenko, Nature 436, 997 (2005).
[CrossRef]

J. Yamamoto, Nishiyama, M. Inoue, and H. Yokoyama, Nature 437, 525 (2005).
[CrossRef] [PubMed]

Nature Mater. (1)

H. Kikuchi, M. Yokota, Y. Hisakado, H. Yang, and T. Kajiyama, Nature Mater. 1, 64 (2002).
[CrossRef]

Phys. Rev. Lett. (1)

D. L. Johnson, J. H. Flack, and P. P. Crooker, Phys. Rev. Lett. 45, 641 (1981).
[CrossRef]

Rev. Mod. Phys. (1)

D. C. Wright and N. D. Mermin, Rev. Mod. Phys. 61, 385 (1989).
[CrossRef]

Other (1)

P. P. Crooker, in Chiarality in Liquid CrystalsH.-S.Kitzerow and C.Bahr, eds. (Springer, 2001), pp. 186-222
[CrossRef]

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Figures (4)

Fig. 1
Fig. 1

(a)–(e) Polarizing optical microscope pictures of the PSBP mixture before polymerization. The mixture is polymerized at 29.4 ° C . (f)–(j) Microscopic texture after polymerization.

Fig. 2
Fig. 2

(a) Field-induced redshift of Bragg reflection in a BP liquid crystal cell with increasing applied voltage and (b) electrically switched color redshifted in Bragg reflection of a PSBP with increasing applied voltage. A PSBP cell shows wider tunable range compared with that of a BP liquid crystal cell.

Fig. 3
Fig. 3

Shematic illustration of electrically switched color of a PSBP cell in which the blue reflected wavelength (a) is switched to reflect a green color (b) and red (c) with an increase in applied voltage. The incorporation of polymer network maximizes the structural integrity and prevents structural deformation before reaching the critical field. Corresponding photographs of a one-pixel PSBP cell with 10 μ m cell gap is operated in the reflective mode with appearance of color by Bragg reflection under ( a ) 0 V (blue), ( b ) 33 V (green), and ( c ) 40 V (red), respectively.

Fig. 4
Fig. 4

(a) SEM image of PSBP showing water lily–like polymer network from a cell without alignment layer, (b) the polymer morphology at the opposite substrate surface, (c) spongelike polymer network from a PSBP cell with surface alignment layers which wraps around the cubic lattice of a BP with interconnected holes that vary in size and distribution, and (d) the enlarged image of the spongelike polymer morphology.

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