Diffusive random laser modes under a spatiotemporal scope


Autoria(s): Garcia-Revilla, Sara; Fernandez, Joaquin; Barredo-Zuriarrain, Macarena; Carlos, Luis D.; Pecoraro, Edison; Iparraguirre, Ignacio; Azkargorta, Jon; Balda, Rolindes
Contribuinte(s)

Universidade Estadual Paulista (UNESP)

Data(s)

22/10/2015

22/10/2015

26/01/2015

Resumo

At present the prediction and characterization of the emission output of a diffusive random laser remains a challenge, despite the variety of investigated materials and theoretical interpretations given up to now. Here, a new mode selection method, based on spatial filtering and ultrafast detection, which allows to separate individual lasing modes and follow their temporal evolution is presented. In particular, the work explores the random laser behavior of a ground powder of an organic-inorganic hybrid compound based on Rhodamine B incorporated into a di-ureasil host. The experimental approach gives direct access to the mode structure and dynamics, shows clear modal relaxation oscillations, and illustrates the lasing modes stochastic behavior of this diffusive scattering system. The effect of the excitation energy on its modal density is also investigated. Finally, imaging measurements reveal the dominant role of diffusion over amplification processes in this kind of unconventional lasers. (C) 2015 Optical Society of America

Formato

1456-1469

Identificador

https://www.osapublishing.org/oe/abstract.cfm?uri=oe-23-2-1456

Optics Express, v. 23, n. 2, p. 1456-1469, 2015.

1094-4087

http://hdl.handle.net/11449/129622

http://dx.doi.org/10.1364/OE.23.001456

WOS:000349166100084

Idioma(s)

eng

Publicador

Optical Soc Amer

Relação

Optics Express

Direitos

openAccess

Tipo

info:eu-repo/semantics/article