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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-22 1:52 |
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Conference: Bucharest University Faculty of Physics 2024 Meeting
Section: Polymer Physics
Title:
From Spontaneous Emission to LASER Capabilities in Innovative Dye-Embedded Organic Systems
Authors:
Valentin BARNA
Affiliation:
University of Bucharest, Faculty of Physics, PO Box MG 11, Magurele-Bucharest, Romania
E-mail
barnavalentin@yahoo.com
Keywords:
Random Light Generation, Fluorescence, Light Scattering, Optical Amplification, Micro-Lasers
Abstract:
Systems employed for light generation and amplification are extensively studied nowadays both theoretically and experimentally. Random Lasers (RLs) serve as fascinating examples of devices that combine the scattering of light and optical amplification. The combination of light localization and random lasing is particularly intriguing due to the unique characteristics of each lasing source and the distinct emission properties of localized modes. In this study, we present laser emission from small-scale systems doped with fluorescent dye, whether confined or boundary-less. Various optical emission characteristics, such as spectral analysis, behavior below and above the lasing energy threshold, emission efficiency, intensity profiling of far-field spatial lasing modes, and temporal emission behavior, validate the light amplification and the occurrence of laser emission from our true mirrorless devices. The proposed micro-lasers stand out for sub-nanometer emission peak wavelength, their low lasing threshold, high efficiency, long-term stability, ease of fabrication and diverse design possibilities. These systems are ideal for producing small-scale flexible laser systems and are anticipated to find applications in modern biomedical fields, optics, photonics and material science.
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