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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-23 17:56 |
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Conference: Bucharest University Faculty of Physics 2016 Meeting
Section: Polymer Physics
Title:
Mirrorless dye doped ionic liquid Lasers
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:
periodically structured dielectrics, optical amplification, dye laser instruments
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. Herein we demonstrate laser action in a new category of materials, namely dye doped ionic liquids. Owing to their low vapor pressure, low inflammability, liquidity over a wide temperature range, recyclability, elevated solvation capabilities, high thermal and chemical stability ionic liquids are excellent nominees for building, as demonstrated, a series of exotic boundaryless or confined laser systems. Ranging from standard wedge sandwich cell design to freely suspended thin active media films and liquid droplets, these lasers are ultra-compact hazard free narrow banded (FWHM ca. 0.4 nm for each laser mode) emitters that excel due to their low lasing threshold, elevated efficiency, long term durability, easiness in fabrication and vast variety of possible configurations. 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 a result, these materials can be employed as optimal near future replacements of conventional flammable solvents in already available dye laser instruments.
References:
[1] J.D. Joannopoulos, S.G. Johnson, J. N. Winn, R.D. Meade, Photonic Crystals: Moulding the Flow of Light, second ed., Princeton University Press, Princeton, NJ, 2008.
[2] V. Barna, L. De Cola, Opt. Express 23 (2015) 11936-11945.
[3] S. Mujumdar, M. Ricci, R. Torre, and D. S. Wiersma, Phys. Rev. Lett. 93 (2004).
[4] G. Strangi, V. Barna, R. Caputo, A. de Luca, C. Versace, N. Scaramuzza, C. Umeton, and R. Bartolino, Phys. Rev. Lett. 94 (2005).
[5] G. Strangi, S. Ferjani, V. Barna, A. de Luca, C. Versace, N. Scaramuzza, and R. Bartolino, Opt. Express 14 (2006) 7737-7744.
[6] D. S. Wiersma, Nature Physics 4 (2008) 359-367.
[7] D. S. Wiersma, Nature Photonics 3 (2009) 246-248.
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