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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-23 18:18 |
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Conference: Bucharest University Faculty of Physics 2014 Meeting
Section: Polymer Physics
Title:
From Fluorescence to Laser Action in Novel Dye Doped Organic Systems
Authors:
V. BARNA
Affiliation:
University of Bucharest, Faculty of Physics, PO Box MG 11, Magurele-Bucharest, Romania
E-mail
barnavalentin@yahoo.com
Keywords:
Active Materials for Laser Emission, Flexible Random Laser Systems, Free Standing and Freely Suspended Thin Films, Light Amplification.
Abstract:
Light amplification phenomena and random lasers have been the subject of intense theoretical and experimental studies. They are captivating examples of scientific topics that synergize multiple scattering of light and optical amplification. 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 compact systems. Optical emission characteristics such as spectral analysis, below and above lasing energy threshold behavior, emission efficiency, far field spatial lasing modes intensity profiling, temporal emission behavior etc confirm the light amplification and that laser emission occurs from our mirrorless devices. 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, excellent efficiency, long term stability, simplicity in fabrication and vast variety of possible design configurations. These materials are appropriate candidates for manufacturing small scale flexible laser systems and we predict their future employment in key areas of modern bio-medical applications, optics and photonics, and material science arena in general.
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