Number of the records: 1
Optically Transportable Optofluidic Microlasers with Liquid Crystal Cavities Tuned by the Electric Field
- 1.
SYSNO ASEP 0548609 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Optically Transportable Optofluidic Microlasers with Liquid Crystal Cavities Tuned by the Electric Field Author(s) Jonáš, Alexandr (UPT-D) RID, SAI, ORCID
Pilát, Zdeněk (UPT-D) RID, SAI, ORCID
Ježek, Jan (UPT-D) RID, ORCID, SAI
Bernatová, Silvie (UPT-D) RID, SAI
Jedlička, Petr (UPT-D) RID, SAI
Aas, M. (TR)
Kiraz, A. (TR)
Zemánek, Pavel (UPT-D) RID, SAI, ORCIDNumber of authors 8 Source Title ACS Applied Materials and Interfaces. - : American Chemical Society - ISSN 1944-8244
Roč. 13, č. 43 (2021), s. 50657-50667Number of pages 11 s. Publication form Print - P Language eng - English Country US - United States Keywords tunable optofluidic microcavity ; optofluidic laser ; whispering gallery modes ; liquid crystals ; optical trapping ; microfluidics Subject RIV BH - Optics, Masers, Lasers OECD category Optics (including laser optics and quantum optics) R&D Projects ED0017/01/01 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) LO1212 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) LD14069 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Method of publishing Limited access Institutional support UPT-D - RVO:68081731 UT WOS 000715852100006 EID SCOPUS 85118796111 DOI 10.1021/acsami.1c11936 Annotation Liquid crystal microdroplets with readily adjustable optical properties have attracted considerable attention for building reconfigurable optofluidic microsystems for sensing, imaging, and light routing applications. In this quest, development of active optical microcavities serving as versatile integrated sources of coherent light and ultra-sensitive environmental sensors has played a prominent role. Here, we study transportable optofluidic microlasers reversibly tunable by an external electric field, which are based on fluorophore-doped emulsion droplets of radial nematic liquid crystals manipulated by optical tweezers in microfluidic chips with embedded liquid electrodes. Full transparency of the electrodes formed by a concentrated electrolyte solution allows for applying an electric field to the optically trapped droplets without undesired heating caused by light absorption. Taking advantage of independent, precise control over the electric and thermal stimulation of the lasing liquid crystal droplets, we characterize their spectral tuning response at various optical trapping powers and study their relaxation upon a sudden decrease in the trapping power. Finally, we demonstrate that sufficiently strong applied electric fields can induce fully reversible phase transitions in the trapped droplets even below the bulk melting temperature of the used liquid crystal. Our observations indicate viability of creating electrically tunable, optically transported microlasers that can be prepared on-demand and operated within microfluidic chips to implement integrated microphotonic or sensing systems. Workplace Institute of Scientific Instruments Contact Martina Šillerová, sillerova@ISIBrno.Cz, Tel.: 541 514 178 Year of Publishing 2022 Electronic address https://pubs.acs.org/doi/10.1021/acsami.1c11936
Number of the records: 1