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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-23 17:48 |
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Conference: Bucharest University Faculty of Physics 2017 Meeting
Section: Polymer Physics
Title:
Highly efficient free-form soft-matter lasers
Authors:
Valentin BARNA
Affiliation:
University of Bucharest, Faculty of Physics, PO Box MG 11, Magurele-Bucharest, Romania
E-mail
barnavalentin@yahoo.com
Keywords:
random lasing, spectral analysis, wedge cell geometries
Abstract:
The mélange of light localization and random lasing is especially interesting because of the specific features of each distinctive lasing source, accompanied by unique emission characteristics of the localized modes. Herein we demonstrate laser emission from confined or boundary-less dye-doped gel material systems. Optical emission characteristics such as spectral analysis, below and above lasing energy threshold behavior, emission efficiency, far field spatial lasing modes intensity profiling, and temporal emission behavior confirm the light amplification and that laser emission occurs from our mirror-less devices. Laser action is validated for wedge cell geometries, freely suspended thin gel films and droplets of various viscosities. The proposed ultra-compact hazard free lasers are narrow banded (0.4 nm or below for each mode) emitters that excel due to their demonstrated low lasing threshold, superior efficiency, long term stability, simplicity in fabrication and vast variety of possible design configurations.
Acknowledgement:
The research activities were supported from the RO PN-II-RU-TE-2014-2412 grant.
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