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Effect of Phase Retardation on Defect‐Mode Lasing in Polymeric Cholesteric Liquid Crystals
Author(s) -
Song M. H.,
Park B.,
Shin K.C.,
Ohta T.,
Tsunoda Y.,
Hoshi H.,
Takanishi Y.,
Ishikawa K.,
Watanabe J.,
Nishimura S.,
Toyooka T.,
Zhu Z.,
Swager T. M.,
Takezoe H.
Publication year - 2004
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.200306360
Subject(s) - materials science , lasing threshold , liquid crystal , birefringence , cholesteric liquid crystal , phase (matter) , polymer , optoelectronics , laser , layer (electronics) , optics , nanotechnology , composite material , organic chemistry , wavelength , chemistry , physics
Lasing via a phase retardation defect mode is reported for the first time. The Figure shows the far‐field pattern of laser emission realized by inserting an anisotropic nematic liquid crystal (LC) defect layer between polymer cholesteric LC layers. The system mimics the cuticle of Plusiotis resplendens , a beetle, using the birefringence of the anisotropic layer to achieve reflectance greater than the 50 % provided by simple cholesteric LC photonic bandgaps.