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Influence of liquid crystalline phases on the tunability of a random laser
dc.contributor.author | Trull Silvestre, José Francisco |
dc.contributor.author | Salud Puig, Josep |
dc.contributor.author | Díez Berart, Sergio |
dc.contributor.author | López Pérez, David Orencio |
dc.contributor.other | Universitat Politècnica de Catalunya. Departament de Física |
dc.date.accessioned | 2017-06-26T09:26:56Z |
dc.date.issued | 2017-05-30 |
dc.identifier.citation | Trull, J., Salud, J., Diez, S., Lopez, D. Influence of liquid crystalline phases on the tunability of a random laser. "Physical review E", 30 Maig 2017, vol. 95, núm. 5, p. 052704-1-052704-9. |
dc.identifier.issn | 2470-0045 |
dc.identifier.uri | http://hdl.handle.net/2117/105854 |
dc.description.abstract | In this paper, we report the temperature behavior of an optimized disordered photonic system-based liquid crystal by means of heat capacity and refractive index measurements. The scattering system is formed by a porous borosilicate glass random matrix (about 60%) infiltrated with a smectogenic liquid crystal (about 16%) and a small amount of laser dye (0.1%). The rest of the scattering system is about 24% air, giving rise to a high refractive index contrast scattering system. Such a system has the functionality to change the refractive index contrast with temperature due to the liquid crystal temperature behavior. The system, optically pumped by the second harmonic of a Q-switched Nd:YAG pulsed laser working at 532 nm, exhibits random laser action, the threshold of which depends upon the liquid crystalline mesophase. Temperatures of existence of the smectic- B phase correspond to the most optimized random laser. In such a mesophase, the transport mean free path has been determined as about 16 µm in a coherent backscattering experiment. |
dc.language.iso | eng |
dc.publisher | American Chemical Society (ACS) |
dc.rights | Attribution-NonCommercial-NoDerivs 3.0 Spain |
dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/3.0/es/ |
dc.subject | Àrees temàtiques de la UPC::Física |
dc.subject | Àrees temàtiques de la UPC::Física::Termodinàmica |
dc.subject.lcsh | Lasers |
dc.subject.lcsh | Liquid crystals |
dc.subject.lcsh | Thermodynamics |
dc.title | Influence of liquid crystalline phases on the tunability of a random laser |
dc.type | Article |
dc.subject.lemac | Làsers |
dc.subject.lemac | Cristalls líquids |
dc.subject.lemac | Termodinàmica |
dc.contributor.group | Universitat Politècnica de Catalunya. DONLL - Dinàmica no Lineal, Òptica no Lineal i Làsers |
dc.contributor.group | Universitat Politècnica de Catalunya. GRPFM - Grup de Recerca en Propietats Físiques dels Materials |
dc.identifier.doi | 10.1103/PhysRevE.95.052704 |
dc.relation.publisherversion | https://journals.aps.org/pre/abstract/10.1103/PhysRevE.95.052704 |
dc.rights.access | Restricted access - publisher's policy |
local.identifier.drac | 21103175 |
dc.description.version | Postprint (author's final draft) |
dc.date.lift | 10000-01-01 |
local.citation.author | Trull, J.; Salud, J.; Diez, S.; Lopez, D. |
local.citation.publicationName | Physical review E |
local.citation.volume | 95 |
local.citation.number | 5 |
local.citation.startingPage | 052704-1 |
local.citation.endingPage | 052704-9 |
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