Tunable whispering gallery mode emission from a microdroplet in elastomer.
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.
Saito
Mitsunori
M
Department of Electronics and Informatics, Ryukoku University, Seta, Otsu 520-2194, Japan. msaito@rins.ryukoku.ac.jp
Shimatani
Hiroya
H
Naruhashi
Hideyuki
H
D020724:Elastomers / Q000737:chemistry*; D004867:Equipment Design; D019544:Equipment Failure Analysis; D007834:Lasers; D044085:Microfluidics / Q000295:instrumentation*; D009991:Oscillometry / Q000295:instrumentation*; D012235:Rhodamines / Q000737:chemistry* / Q000528:radiation effects
D020724:Elastomers; D012235:Rhodamines; C026188:rhodamine 6G