Title

Low-threshold and high efficiency lasing upon band-edge excitation in a cholesteric liquid crystal

Authors

Authors

Y. Matsuhisa; Y. H. Huang; Y. Zhou; S. T. Wu; R. Ozaki; Y. Takao; A. Fujii;M. Ozaki

Comments

Authors: contact us about adding a copy of your work at STARS@ucf.edu

Abbreviated Journal Title

Appl. Phys. Lett.

Keywords

SPONTANEOUS-EMISSION; STOP BAND; LASER; GAP; ENHANCEMENT; WAVE; Physics, Applied

Abstract

A low threshold and high efficiency laser based on dye-doped cholesteric liquid crystals (CLCs) is demonstrated using an input excitation with the same handedness of circular polarization as the helical structure of the sample at the shorter wavelength band edge of the reflection band. The responsible mechanism originates from the dramatic increase of the optical density of state (DOS) at the band edges. The calculated DOS of the CLC system confirms the authors' experimental results.(c) 2007 American Institute of Physics.

Journal Title

Applied Physics Letters

Volume

90

Issue/Number

9

Publication Date

1-1-2007

Document Type

Article

Language

English

First Page

3

WOS Identifier

WOS:000244591700014

ISSN

0003-6951

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