One axis guided random laser emission from a glass capillary composite

Author(s)

Alves, Caroline Cassia ^[1] ; Lima Ribeiro, Sidney Jose ^[2] ; Mendonca, Cleber Renato ^[3] ; de Boni, Leonardo ^[3] ; Almeida Caiut, Jose Mauricio ^[1]

Affiliation

^[1] Univ Sao Paulo, Fac Filosofia Ciencias & Letras Ribeirao Preto, Dept Quim, BR-14040901 Ribeirao Preto, SP - Brazil

^[2] Sao Paulo State Univ, UNESP, Inst Chem, BR-14801970 Araraquara, SP - Brazil

^[3] Univ Sao Paulo SP, Inst Fis Sao Carlos, Sao Paulo, SP - Brazil

• Document type: Journal article
• Source: Journal of Luminescence; v. 211, p. 426-430, JUL 2019.
• Web of Science Citations: 0

Abstract

Random lasers are structures in which light is both, multiply scattered and amplified. The present study uses Rhodamine B and organic-inorganic hybrid materials to investigate the random lasing properties of silica capillary systems. The composite was prepared by dispersing the dye into an aluminoxane-epoxy-siloxane hybrid together with Boehmite powder, which are subsequently used to fill fused silica capillaries. In this system, Rhodamine B and Boehmite particles act at the same time as a gain and scattering medium, respectively. Random laser emission was performed by using the second harmonic of a 100-ps Nd:YAG laser as pump source; a typical laser threshold behavior was observed for a pumping fluency of 6 mu J/mm(2). The random laser emission spectrum also displays a tunable behavior. This resulted from a combination of the broad emission spectrum of the dye with the different Boehmite particle sizes allied with the advantage of the capillary geometry. (AU)

• FAPESP's process: 16/11670-5 - NANOMATERIALS AND LUMINESCENT SYSTEMS BASED ON RARE EARTH IONS
• Grantee: José Maurício Almeida Caiut
• Support Opportunities: Regular Research Grants