Abstract

External cavity-free and electrically tunable laser made from photonics band gap (PBG) materials with electrically tunable stop band is reported. The tunable PBG materials are developed from a family of novel cholesteric liquid crystals (CLC) with electrically variable pitch that adopts a non-constant distribution in space across the CLC film. The CLC exhibits a distributed feedback cavity whose resonant frequency can be electrically varied over a spectral range wider than 300 nm. Under an optical pumping and subject to a variable electric field, a tunable laser has been demonstrated in experiment that shows a wavelength tuning over 33 nm.

© 2005 Optical Society of America

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Adv. Mater. (1)

H. Finkelmann, S.T. Kim, A, Munoz, P. Palffy-Muhoray and B. Taheri, �??Tunable mirrorless lasing in cholesteric liquid crystalline elastomers,�?? Adv. Mater. 13, 1069-1072 (2001).
[CrossRef]

Appl. Phys. Lett. (1)

A. Chanishvili, G. Chilaya, G. Petriashvili, R.Barberi, R. Bartolino, G. Cipparrone, A.Mazzulla, R. Gimenez, L. Oriol, and M. Pinol, �??Widely tunable ultraviolet-visible liquid crystal laser,�?? Appl. Phys. Lett. 80, 051107 (2005)

Eur. Phys. J. B (1)

J. Schmidtkea, and W. Stille, �??Fluorescence of a dye-doped cholesteric liquid crystal film in the region of the stop band: theory and experiment,�?? Eur. Phys. J. B 31, 179�??194 (2003).
[CrossRef]

Great Lakes Photonics Symposium 2004 (1)

Haiping Yu, Jianhui Li, Ben Tang & Le Li, �??Mirrorless electrically tunable CLC lasers,�?? presented at Great Lakes Photonics Symposium, Cleveland, Ohio, 7-11 June, 2004.

Opt. Lett. (3)

Phys. Rev. Lett. (5)

V. I. Kopp, A. Z. Genack, and Z-Q. Zhang, �??Large coherence area thin-film photonic stop-band lasers,�?? Phys. Rev. Lett. 86, 1753-1756 (2001).
[CrossRef]

J. Schmidtke, W. Stille, and H. Finkelmann, �??Defect mode emission of a dye doped cholesteric polymer network,�?? Phys. Rev. Lett. 90, 083902 (2003).
[CrossRef]

E. Yablonovitch, �??Inhibited spontaneous emission in solid-state physics and electronics,�?? Phys. Rev. Lett. 58, 2059�??2062 (1987).
[CrossRef]

S. John, �??Strong localization of photons in certain disordered dielectric superlattices,�?? Phys. Rev. Lett. 58, 2486-2489 (1987).
[CrossRef]

K. Busch and S. John, �??Liquid-crystal photonic-band-gap materials: the tunable electromagnetic vacuum,�?? Phys. Rev. Lett. 83, 967-970 (1999).
[CrossRef]

Proc. SPIE (1)

A. Munoz, P. Palffy-Muhoray, B. Taheri, R. J. Twieg, �??Lasing in cholesteric liquid crystals from UV to IR,�?? Proc. SPIE 4463, [4463-17] (2001).

Proc. SPIE 29 July - 3 Aug 2001 (1)

L. Li, �??Special liquid crystal materials with multiple optical states and fast response time,�?? presented at SPIE International Symposium on Optical Science and Technology, San Diego, California, 29 July-3 Aug, 2001.

Other (2)

R. Gaughan, �??Infiltrated crystal offers tunable bandgap,�?? <a href= "http://www.photonics.com/spectra/tech/XQ/ASP/techid.1302/QX/read.htm">http://www.photonics.com/spectra/tech/XQ/ASP/techid.1302/QX/read.htm</a>

K. Yoshino, S. John, R. H. Baughman, R. D. McCullough, Z. V. Vardeny, and A. A. Zakhidov, �??Tunable photonic crystal from interpenetrating electroactive networks: design, synthesis and devices,�?? <a href= "http://www.nedo.go.jp/itd/grant-e/BUSSEI/97mb1-e.htm">http://www.nedo.go.jp/itd/grant-e/BUSSEI/97mb1-e.htm</a>

Supplementary Material (1)

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