Widely Tunable Lasing in a Colloidal Crystal Gel Film Permanently Stabilized by an Ionic Liquid

Widely tunable laser action by low threshold optical excitation can be realized by a colloidal crystal gel (CC‐G) film permanently stabilized by a non‐volatile ionic liquid. The CC‐G film consists of a non‐close‐packed structure of microparticles immobilized in a polymer gel. Optical excitation with...

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Bibliographic Details
Published in:Advanced materials (Weinheim) 2011-09, Vol.23 (33), p.3815-3820
Main Authors: Furumi, Seiichi, Kanai, Toshimitsu, Sawada, Tsutomu
Format: Article
Language:English
Subjects:
colloidal crystals
lasing
photonic bandgaps
tunable emission
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Summary:Widely tunable laser action by low threshold optical excitation can be realized by a colloidal crystal gel (CC‐G) film permanently stabilized by a non‐volatile ionic liquid. The CC‐G film consists of a non‐close‐packed structure of microparticles immobilized in a polymer gel. Optical excitation with green light gives rise to a single and very narrow laser emission with red color. The single laser emission peak can be tuned in a wide wavelength range by applying mechanical stress.
ISSN:0935-9648
1521-4095
DOI:10.1002/adma.201101825