Liquid crystal emulsion micro-droplet WGM resonators

0437743 - ÚPT 2015 RIV US eng C - Conference Paper (international conference)
Ježek, Jan - Pilát, Zdeněk - Brzobohatý, Oto - Jonáš, A. - Aas, M. - Kiraz, A. - Zemánek, Pavel
Liquid crystal emulsion micro-droplet WGM resonators.
19th Polish-Slovak-Czech Optical Conference on Wave and Quantum Aspects of Contemporary Optics (Proceedings of SPIE 9441). Bellingham: SPIE, 2014, 944108:1-9. ISBN 9781628415568. ISSN 0277-786X.
[Polish-Slovak-Czech Optical Conference on Wave and Quantum Aspects of Contemporary Optics /19./. Jelenia Góra (PL), 08.09.2014-12.09.2014]
R&D Projects: GA TA ČR TA03010642; GA MŠMT(CZ) LO1212; GA MŠMT(CZ) LD14069; GA MŠMT ED0017/01/01
Institutional support: RVO:68081731
Keywords : liquid crystals * resonators * optical trapping * water * lasers
Subject RIV: BH - Optics, Masers, Lasers

We introduce tunable optofluidic microlasers based on optically stretched or thermally modified, dye-doped emulsion droplets of liquid crystals (LC) confined in a dual-beam optical trap. Droplets were created in microfluidic chips or by shaking. Optically trapped microdroplets emulsified in water and stained with fluorescent dye act as an active ultrahigh-Q optical resonant cavity hosting whispering gallery modes (WGMs). Tuning of the laser emission wavelength was achieved by a controlled deformation of the droplet shape using light-induced forces generated by dual-beam optical trap and by thermal changing of the order in the LC.
Permanent Link: http://hdl.handle.net/11104/0241263