Thermal tuning of spectral emission from optically trapped liquid-crystal droplet resonators

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081731%3A_____%2F17%3A00478138" target="_blank" >RIV/68081731:_____/17:00478138 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1364/JOSAB.34.001855" target="_blank" >http://dx.doi.org/10.1364/JOSAB.34.001855</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1364/JOSAB.34.001855" target="_blank" >10.1364/JOSAB.34.001855</a>

Result language

angličtina

Original language name

Thermal tuning of spectral emission from optically trapped liquid-crystal droplet resonators

Original language description

Surfactant-stabilized emulsion droplets of liquid crystals (LCs) suspended in water and labeled with a fluorescent dye form active, anisotropic optofluidic microresonators. These microresonators can host whispering gallery modes (WGMs), high-quality morphology-dependent optical resonances that are supported due to the contrast of refractive index between the LC droplets and the surrounding aqueous medium. In addition, owing to the refractive index contrast, such LC emulsion droplets can be stably trapped in three dimensions using optical tweezers, enabling long-term investigation of their spectral characteristics. We explore various combinations of fluorescently dyed LC droplets and host liquid-surfactant systems and show that the WGM emission spectra of optical resonators based on optically trapped LC emulsion droplets can be largely and (almost) reversibly tuned by controlled changes of the ambient temperature. Depending on the actual range of temperature modulation and LC phase of the studied droplet, thermally induced effects can either lead to phase transitions in the LC droplets or cause modifications of their refractive index profile without changing their LC phase. Our results indicate feasibility of this approach for creating miniature thermally tunable sources of coherent light that can be manipulated and stabilized by optical forces.

Czech name

—

Czech description

—

Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10306 - Optics (including laser optics and quantum optics)

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2017

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Journal of the Optical Society of America. B

ISSN

0740-3224

e-ISSN

—

Volume of the periodical

34

Issue of the periodical within the volume

9

Country of publishing house

US - UNITED STATES

Number of pages

10

Pages from-to

1855-1864

UT code for WoS article

000409303100012

EID of the result in the Scopus database

2-s2.0-85028654440