Abstract

We report the observation of stimulated emission and mirrorless lasing in pure cholesteric liquid crystals. The lasing action is attributed to the combination of the fluorescence and the distributed feedback that are due to the inherent periodic structure of the liquid crystal. If the reflection band matches the intrinsic emission of the cholesteric liquid crystal, the crystal becomes a natural laser material, which will self-lase, without any optical elements or the addition of dyes, under picosecond excitation at 355  nm. Samples have been made to lase at different wavelengths in the near UV by shifting of the edge of the reflection band in the range of 385–405  nm. Typical linewidths observed are of the order of 0.5  nm.

© 2001 Optical Society of America

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References

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  1. L. S. Goldberg and J. M. Schnur, “Tunable internal-feedback liquid crystal laser,” U.S. patent3,771,065 (November6, 1973).
  2. I. P. Il’chshin, E. A. Tikhonov, V. G. Tishchenko, and M. T. Shpak, JETP Lett. 32, 27 (1981).
  3. V. I. Kopp, B. Fan, H. K. M. Vithana, and A. Z. Genack, Opt. Lett. 21, 1707 (1998).
    [CrossRef]
  4. B. Taheri, P. Palffy-Muhoray, and H. Kabir, presented at the ALCOM Symposium on Chiral Materials and Applications, Cuyahoga Falls, Ohio, February 18–19, 1999.
  5. G. H. B. Thompson, Physics of Semiconductor Laser Devices (Wiley, New York, 1980).
  6. P. Palffy-Muhoray and B. Taheri, Book of Abstracts of the XIII Conference on Liquid Crystals (Studio Bel, Warsaw, 1999), p.  20.
  7. B. Taheri, A. F. Muñoz, P. Palffy-Muhoray, and R. Twieg, Mol. Cryst. Liq. Cryst. 358, 73 (2001).
    [CrossRef]
  8. G. E. O’Keefe, J. C. De Mello, G. J. Denton, K. J. McEwan, and S. J. Till, Liq. Cryst. 21, 225 (1996).
    [CrossRef]
  9. S. Kato, F.-Q. Chen, T. Shimada, T. Yatsuhashi, H. Inoue, and C. Pac, J. Phys. Chem. B 104, 2642 (2000).
  10. M. Sisido, X. Wang, K. Kawaguchi, and Y. Imanishi, J. Phys. Chem. 92, 4797 (1988).
  11. M. Sisido, X. Wang, K. Kawaguchi, and Y. Imanishi, J. Phys. Chem. 92, 4801 (1988).
  12. K. Kawaguchi, M. Sisido, and Y. Imanishi, J. Phys. Chem. 92, 4806 (1988).

2001 (1)

B. Taheri, A. F. Muñoz, P. Palffy-Muhoray, and R. Twieg, Mol. Cryst. Liq. Cryst. 358, 73 (2001).
[CrossRef]

2000 (1)

S. Kato, F.-Q. Chen, T. Shimada, T. Yatsuhashi, H. Inoue, and C. Pac, J. Phys. Chem. B 104, 2642 (2000).

1998 (1)

V. I. Kopp, B. Fan, H. K. M. Vithana, and A. Z. Genack, Opt. Lett. 21, 1707 (1998).
[CrossRef]

1996 (1)

G. E. O’Keefe, J. C. De Mello, G. J. Denton, K. J. McEwan, and S. J. Till, Liq. Cryst. 21, 225 (1996).
[CrossRef]

1988 (3)

M. Sisido, X. Wang, K. Kawaguchi, and Y. Imanishi, J. Phys. Chem. 92, 4797 (1988).

M. Sisido, X. Wang, K. Kawaguchi, and Y. Imanishi, J. Phys. Chem. 92, 4801 (1988).

K. Kawaguchi, M. Sisido, and Y. Imanishi, J. Phys. Chem. 92, 4806 (1988).

1981 (1)

I. P. Il’chshin, E. A. Tikhonov, V. G. Tishchenko, and M. T. Shpak, JETP Lett. 32, 27 (1981).

Chen, F.-Q.

S. Kato, F.-Q. Chen, T. Shimada, T. Yatsuhashi, H. Inoue, and C. Pac, J. Phys. Chem. B 104, 2642 (2000).

De Mello, J. C.

G. E. O’Keefe, J. C. De Mello, G. J. Denton, K. J. McEwan, and S. J. Till, Liq. Cryst. 21, 225 (1996).
[CrossRef]

Denton, G. J.

G. E. O’Keefe, J. C. De Mello, G. J. Denton, K. J. McEwan, and S. J. Till, Liq. Cryst. 21, 225 (1996).
[CrossRef]

Fan, B.

V. I. Kopp, B. Fan, H. K. M. Vithana, and A. Z. Genack, Opt. Lett. 21, 1707 (1998).
[CrossRef]

Genack, A. Z.

V. I. Kopp, B. Fan, H. K. M. Vithana, and A. Z. Genack, Opt. Lett. 21, 1707 (1998).
[CrossRef]

Goldberg, L. S.

L. S. Goldberg and J. M. Schnur, “Tunable internal-feedback liquid crystal laser,” U.S. patent3,771,065 (November6, 1973).

Il’chshin, I. P.

I. P. Il’chshin, E. A. Tikhonov, V. G. Tishchenko, and M. T. Shpak, JETP Lett. 32, 27 (1981).

Imanishi, Y.

M. Sisido, X. Wang, K. Kawaguchi, and Y. Imanishi, J. Phys. Chem. 92, 4797 (1988).

M. Sisido, X. Wang, K. Kawaguchi, and Y. Imanishi, J. Phys. Chem. 92, 4801 (1988).

K. Kawaguchi, M. Sisido, and Y. Imanishi, J. Phys. Chem. 92, 4806 (1988).

Inoue, H.

S. Kato, F.-Q. Chen, T. Shimada, T. Yatsuhashi, H. Inoue, and C. Pac, J. Phys. Chem. B 104, 2642 (2000).

Kabir, H.

B. Taheri, P. Palffy-Muhoray, and H. Kabir, presented at the ALCOM Symposium on Chiral Materials and Applications, Cuyahoga Falls, Ohio, February 18–19, 1999.

Kato, S.

S. Kato, F.-Q. Chen, T. Shimada, T. Yatsuhashi, H. Inoue, and C. Pac, J. Phys. Chem. B 104, 2642 (2000).

Kawaguchi, K.

K. Kawaguchi, M. Sisido, and Y. Imanishi, J. Phys. Chem. 92, 4806 (1988).

M. Sisido, X. Wang, K. Kawaguchi, and Y. Imanishi, J. Phys. Chem. 92, 4797 (1988).

M. Sisido, X. Wang, K. Kawaguchi, and Y. Imanishi, J. Phys. Chem. 92, 4801 (1988).

Kopp, V. I.

V. I. Kopp, B. Fan, H. K. M. Vithana, and A. Z. Genack, Opt. Lett. 21, 1707 (1998).
[CrossRef]

McEwan, K. J.

G. E. O’Keefe, J. C. De Mello, G. J. Denton, K. J. McEwan, and S. J. Till, Liq. Cryst. 21, 225 (1996).
[CrossRef]

Muñoz, A. F.

B. Taheri, A. F. Muñoz, P. Palffy-Muhoray, and R. Twieg, Mol. Cryst. Liq. Cryst. 358, 73 (2001).
[CrossRef]

O’Keefe, G. E.

G. E. O’Keefe, J. C. De Mello, G. J. Denton, K. J. McEwan, and S. J. Till, Liq. Cryst. 21, 225 (1996).
[CrossRef]

Pac, C.

S. Kato, F.-Q. Chen, T. Shimada, T. Yatsuhashi, H. Inoue, and C. Pac, J. Phys. Chem. B 104, 2642 (2000).

Palffy-Muhoray, P.

B. Taheri, A. F. Muñoz, P. Palffy-Muhoray, and R. Twieg, Mol. Cryst. Liq. Cryst. 358, 73 (2001).
[CrossRef]

P. Palffy-Muhoray and B. Taheri, Book of Abstracts of the XIII Conference on Liquid Crystals (Studio Bel, Warsaw, 1999), p.  20.

B. Taheri, P. Palffy-Muhoray, and H. Kabir, presented at the ALCOM Symposium on Chiral Materials and Applications, Cuyahoga Falls, Ohio, February 18–19, 1999.

Schnur, J. M.

L. S. Goldberg and J. M. Schnur, “Tunable internal-feedback liquid crystal laser,” U.S. patent3,771,065 (November6, 1973).

Shimada, T.

S. Kato, F.-Q. Chen, T. Shimada, T. Yatsuhashi, H. Inoue, and C. Pac, J. Phys. Chem. B 104, 2642 (2000).

Shpak, M. T.

I. P. Il’chshin, E. A. Tikhonov, V. G. Tishchenko, and M. T. Shpak, JETP Lett. 32, 27 (1981).

Sisido, M.

M. Sisido, X. Wang, K. Kawaguchi, and Y. Imanishi, J. Phys. Chem. 92, 4801 (1988).

M. Sisido, X. Wang, K. Kawaguchi, and Y. Imanishi, J. Phys. Chem. 92, 4797 (1988).

K. Kawaguchi, M. Sisido, and Y. Imanishi, J. Phys. Chem. 92, 4806 (1988).

Taheri, B.

B. Taheri, A. F. Muñoz, P. Palffy-Muhoray, and R. Twieg, Mol. Cryst. Liq. Cryst. 358, 73 (2001).
[CrossRef]

P. Palffy-Muhoray and B. Taheri, Book of Abstracts of the XIII Conference on Liquid Crystals (Studio Bel, Warsaw, 1999), p.  20.

B. Taheri, P. Palffy-Muhoray, and H. Kabir, presented at the ALCOM Symposium on Chiral Materials and Applications, Cuyahoga Falls, Ohio, February 18–19, 1999.

Thompson, G. H. B.

G. H. B. Thompson, Physics of Semiconductor Laser Devices (Wiley, New York, 1980).

Tikhonov, E. A.

I. P. Il’chshin, E. A. Tikhonov, V. G. Tishchenko, and M. T. Shpak, JETP Lett. 32, 27 (1981).

Till, S. J.

G. E. O’Keefe, J. C. De Mello, G. J. Denton, K. J. McEwan, and S. J. Till, Liq. Cryst. 21, 225 (1996).
[CrossRef]

Tishchenko, V. G.

I. P. Il’chshin, E. A. Tikhonov, V. G. Tishchenko, and M. T. Shpak, JETP Lett. 32, 27 (1981).

Twieg, R.

B. Taheri, A. F. Muñoz, P. Palffy-Muhoray, and R. Twieg, Mol. Cryst. Liq. Cryst. 358, 73 (2001).
[CrossRef]

Vithana, H. K. M.

V. I. Kopp, B. Fan, H. K. M. Vithana, and A. Z. Genack, Opt. Lett. 21, 1707 (1998).
[CrossRef]

Wang, X.

M. Sisido, X. Wang, K. Kawaguchi, and Y. Imanishi, J. Phys. Chem. 92, 4797 (1988).

M. Sisido, X. Wang, K. Kawaguchi, and Y. Imanishi, J. Phys. Chem. 92, 4801 (1988).

Yatsuhashi, T.

S. Kato, F.-Q. Chen, T. Shimada, T. Yatsuhashi, H. Inoue, and C. Pac, J. Phys. Chem. B 104, 2642 (2000).

J. Phys. Chem. (3)

M. Sisido, X. Wang, K. Kawaguchi, and Y. Imanishi, J. Phys. Chem. 92, 4797 (1988).

M. Sisido, X. Wang, K. Kawaguchi, and Y. Imanishi, J. Phys. Chem. 92, 4801 (1988).

K. Kawaguchi, M. Sisido, and Y. Imanishi, J. Phys. Chem. 92, 4806 (1988).

J. Phys. Chem. B (1)

S. Kato, F.-Q. Chen, T. Shimada, T. Yatsuhashi, H. Inoue, and C. Pac, J. Phys. Chem. B 104, 2642 (2000).

JETP Lett. (1)

I. P. Il’chshin, E. A. Tikhonov, V. G. Tishchenko, and M. T. Shpak, JETP Lett. 32, 27 (1981).

Liq. Cryst. (1)

G. E. O’Keefe, J. C. De Mello, G. J. Denton, K. J. McEwan, and S. J. Till, Liq. Cryst. 21, 225 (1996).
[CrossRef]

Mol. Cryst. Liq. Cryst. (1)

B. Taheri, A. F. Muñoz, P. Palffy-Muhoray, and R. Twieg, Mol. Cryst. Liq. Cryst. 358, 73 (2001).
[CrossRef]

Opt. Lett. (1)

V. I. Kopp, B. Fan, H. K. M. Vithana, and A. Z. Genack, Opt. Lett. 21, 1707 (1998).
[CrossRef]

Other (4)

B. Taheri, P. Palffy-Muhoray, and H. Kabir, presented at the ALCOM Symposium on Chiral Materials and Applications, Cuyahoga Falls, Ohio, February 18–19, 1999.

G. H. B. Thompson, Physics of Semiconductor Laser Devices (Wiley, New York, 1980).

P. Palffy-Muhoray and B. Taheri, Book of Abstracts of the XIII Conference on Liquid Crystals (Studio Bel, Warsaw, 1999), p.  20.

L. S. Goldberg and J. M. Schnur, “Tunable internal-feedback liquid crystal laser,” U.S. patent3,771,065 (November6, 1973).

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Figures (4)

Fig. 1
Fig. 1

Excitation spectrum and emission spectra for unpolarized and left circularly polarized modes. The hatched region indicates the reflection band. The inset shows the fluorescence spectrum of the BLO61 mixture.

Fig. 2
Fig. 2

Reflection band (unpolarized), fluorescent emission spectrum (5-mm pump-beam diameter), and laser line (300μm pump-beam diameter) for the BLO61–CB15 mixture. A different intensity scale was used for each of the three curves; they are shown in the same graph for the purpose of comparison.

Fig. 3
Fig. 3

Line narrowing and increase in output power with increasing pump intensity. The curves correspond to input energy Ea=325 nJ and Eb=1.262 μJ.

Fig. 4
Fig. 4

Laser lines observed in CLC mixtures with various CB15 concentrations.

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