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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-22 2:20 |
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Conference: Bucharest University Faculty of Physics 2021 Meeting
Section: Polymer Physics
Title:
Laser emission and light manipulation in confined micro-systems
Authors:
Valentin BARNA (1)
Affiliation:
1) University of Bucharest, Faculty of Physics, 405 Atomistilor Street, 077125, Magurele, Romania
E-mail
barnavalentin@gmail.com
Keywords:
Micro-Systems, light amplification
Abstract:
Lasing phenomena and in particular random lasers have been a domain of intense theoretical and experimental studies in the last years. They are captivating examples of scientific topics that coalesce multiple scattering of light and optical amplification. Specifically, in a random laser system, several discrete modes are optically amplified within the host medium and exhibit individual resonant wavelengths with the spectral interval being usually in the range of a few nanometers. Ionic liquids prove to be perfect candidates for building, as shown, a series of exotic boundary-less or confined compact laser systems. Lasing is presented in standard wedge cells, freely suspended ionic liquid films and droplets. The optical emission properties are investigated in terms of spectral analysis, below and above lasing energy threshold behavior, emission efficiency, far field spatial laser modes intensity profiling, temporal emission behavior etc. As demonstrated, these materials can be employed as optimal near future replacements of conventional flammable solvents in already available dye laser instruments.
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