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Chiroptical Properties Induced in Chiral Photonic‐Bandgap Liquid Crystals Leading to a Highly Efficient Laser‐Feedback Effect
Author(s) -
Furumi S.,
Sakka Y.
Publication year - 2006
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.200501849
Subject(s) - lasing threshold , materials science , cholesteric liquid crystal , liquid crystal , optoelectronics , photonic crystal , excitation , excited state , laser , fluorescence , doping , photonics , optics , atomic physics , wavelength , physics , electrical engineering , engineering
Highly efficient lasing action is obtained by exploiting the chiroptical characteristics of the ground and excited states of an achiral fluorescent dye doped in a cholesteric liquid crystal (CLC) medium (see figure). The highly efficient lasing action from the oblique dye‐doped CLC cell is produced by tuning the ellipticity angle of the excitation beam while taking into consideration the molecular helical sense of the cholesteric host.