Open AccessTunable whispering gallery mode emission from a microdroplet in elastomer
Author(s) -
Mitsunori Saito,
Hiroya Shimatani,
Hideyuki Naruhashi
Publication year - 2008
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.16.011915
Subject(s) - rhodamine 6g , materials science , whispering gallery wave , elastomer , whispering gallery , optics , wavelength , rhodamine , laser , optoelectronics , fluorescence , composite material , physics , resonator
A fluorescent microdroplet was formed in elastomer to facilitate handling and wavelength tuning. A methanol solution of rhodamine 6G was put into a solidifying polysiloxane resin with a needle. Addition of surfactant was effective to stabilize the droplet. Being excited by a laser pulse (532 nm, > 50 microJ/mm(2), 5 ns), the droplet exhibited a whispering gallery mode emission in the 570-610 nm wavelength range. The resonance peaks shifted as the droplet diameter expanded by elastomer deformation.