Electrically Controllable Omnidirectional Laser Emission from a Helical-Polymer Network Composite Film

A liquid‐crystal/polymer composite is used to produce a photonic bandgap system. Films of the composite show a large field‐induced reversible color shift of the reflection band of over 150 nm. Intensity‐controllable laser emission at relatively low lasing thresholds is generated from composite films...

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Bibliographic Details
Published in:Advanced materials (Weinheim) 2009-02, Vol.21 (7), p.771-775
Main Authors: Park, Byoungchoo, Kim, Mina, Kim, Sun Woong, Jang, Wongun, Takezoe, Hideo, Kim, Yunki, Choi, Eun Ha, Seo, Yoon Ho, Cho, Guang Sup, Kang, Seung Oun
Format: Article
Language:English
Subjects:
lasing
liquid crystals
photonic crystals
photonic devices
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Summary:A liquid‐crystal/polymer composite is used to produce a photonic bandgap system. Films of the composite show a large field‐induced reversible color shift of the reflection band of over 150 nm. Intensity‐controllable laser emission at relatively low lasing thresholds is generated from composite films doped with dye. Moreover, the laser exhibits omnidirectional emission propagation on application of an electric field.
ISSN:0935-9648
1521-4095
DOI:10.1002/adma.200800729