Počet záznamů: 1

Tunable optofluidic microlasers based on optically stretched emulsion droplets

SYSNO ASEP	0422303
Druh ASEP	C - Konferenční příspěvek (mezinárodní konf.)
Zařazení RIV	D - Článek ve sborníku
Název	Tunable optofluidic microlasers based on optically stretched emulsion droplets
Tvůrce(i)	Aas, M. (TR) Jonáš, Alexandr (UPT-D)_{RID, SAI, ORCID} Kiraz, A. (TR) Brzobohatý, Oto (UPT-D)_{RID, ORCID, SAI} Ježek, Jan (UPT-D)_{RID, ORCID, SAI} Pilát, Zdeněk (UPT-D)_{RID, SAI, ORCID} Zemánek, Pavel (UPT-D)_{RID, SAI, ORCID}
Celkový počet autorů	7
Zdroj.dok.	Optical Trapping and Optical Micromanipulation X (Proceedings of SPIE Vol. 8810). - Bellingham : SPIE, 2013 - ISSN 0277-786X
Rozsah stran	88101y:1-12
Poč.str.	12 s.
Forma vydání	Tištěná - P
Akce	Optical Trapping and Optical Micromanipulation /10./
Datum konání	25.08.2013-29.08.2013
Místo konání	San Diego
Země	US - Spojené státy americké
Typ akce	WRD
Jazyk dok.	eng - angličtina
Země vyd.	US - Spojené státy americké
Klíč. slova	lasers ; optical trapping ; water ; wavelength tuning
Vědní obor RIV	BH - Optika, masery a lasery
CEP	GPP205/11/P294 GA ČR - Grantová agentura ČR
	TA03010642 GA TA ČR - Technologická agentura ČR
	ED0017/01/01 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy
Institucionální podpora	UPT-D - RVO:68081731
UT WOS	000328460400031
EID SCOPUS	84889602625
DOI	10.1117/12.2024252
Anotace	We introduce tunable optofluidic microlasers based on optically stretched, dye-doped emulsion droplets confined in a dual-beam optical trap. Optically trapped microdroplets of oil emulsified in water and stained with fluorescent dye act as active ultrahigh-Q optical resonant cavities hosting whispering gallery modes (WGMs) which enable dye lasing with low threshold pump powers. In order to achieve tunable dye lasing, the droplets are pumped with a pulsed green laser beam and simultaneously stretched by light in the dual-beam trap. For a given stretching power, the magnitude of the droplet deformation is dictated by the interfacial tension between the droplet and the host liquid which is adjustable by adding surfactants. Increase of power of the dual-beam trap causes a directly proportional change of the droplet stretching deformation. Subsequently, resonant path lengths of different WGMs propagating in the droplet are modified, leading to shifts in the corresponding microlaser emission wavelenghts. Using this technique, we present all-optical, almost reversible spectral tuning of the lasing WGMs and show that the direction of wavelength tuning depends on the position of the pump beam focus on the droplet, consistent with the deformation of originally spherical droplet towards a prolate spheroid. In addition, we study the effects of changes of the droplet and immersion medium temperature on the spectral position of lasing WGMs and demonstrate that droplet heating leads to red-tuning of the droplet lasing wavelength.
Pracoviště	Ústav přístrojové techniky
Kontakt	Martina Šillerová, sillerova@ISIBrno.Cz, Tel.: 541 514 178
Rok sběru	2014

Počet záznamů: 1