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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-24 21:09 |
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Conference: Bucharest University Faculty of Physics 2015 Meeting
Section: Polymer Physics
Title:
Mirrorless dye doped soft matter microLASERS
Authors:
Valentin BARNA(1)
Affiliation:
1) University of Bucharest, Faculty of Physics, PO Box MG 11, Magurele-Bucharest, Romania
E-mail
barnavalentin@yahoo.com
Keywords:
Light Amplification and LASERs, Free Standing and Freely Suspended Thin Films, Dye Doped Confined Soft Matter Systems.
Abstract:
The study of electromagnetic waves propagation in periodically structured dielectrics and the linear and nonlinear optical phenomena in disordered systems doped with gain media represent one of the most challenging and exciting scientific areas of the past decade. Lasing and Random Lasers (RL) are fascinating examples of topics that synergize multiple scattering of light and optical amplification and lately have been the subject of intense theoretical and experimental studies. In this manuscript we demonstrate laser action in new soft materials (for this application). They prove to be ideal candidates for building, as shown, a series of exotic boundaryless 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 confirmed, these materials could be employed as optimal near future replacements of conventional flammable solvents in already available dye laser instruments.
References:
1.D. S. Wiersma, "The physics and applications of random lasers," Nature Physics 4 , 359-367 (2008).
2.G. Strangi, V. Barna, R. Caputo, A. de Luca, C. Versace, N. Scaramuzza, C. Umeton, and R. Bartolino, "Color-Tunable Organic Microcavity Laser Array Using Distributed Feedback," Phys. Rev. Lett. 94, 063903 (2005).
3.D. S. Wiersma, "Controlling photons with light", Nature Photonics 2, 136-137 (2008).
Acknowledgement:
The research was supported from the Romanian National Project ID-PCE-2011/3/1007 (Nr. 83).
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