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Electrically Controllable Omnidirectional Laser Emission from a Helical‐Polymer Network Composite Film
Author(s) -
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
Publication year - 2009
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.200800729
Subject(s) - materials science , composite number , laser , omnidirectional antenna , polymer , composite material , optoelectronics , nanotechnology , optics , telecommunications , antenna (radio) , physics , computer science
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.