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BIBTEX RIS

Flexible random lasers in dye-doped bio-degradable cellulose nanocrystalline needles

2019; Optica Publishing Group; Volume: 37; Issue: 1 Linguagem: Inglês

10.1364/josab.37.000024

ISSN

1520-8540

Autores

Gleice C. M. Germano, Yan D. R. Machado, Lucas M. Martinho, Susete N. Fernandes, Antonio M.L.M. Costa, Édison Pécoraro, Anderson S. L. Gomes, Isabel C. S. Carvalho,

Tópico(s)

Photonic Crystals and Applications

Resumo

In this work, we developed and investigated a random laser based on rhodamine6G (Rh6G) in ethylene glycol (EG) solution with varying cellulose nanocrystalline (CNC) needles as scatterers in the lasing media. Besides the suspension-in-cuvette scheme, an alternative configuration was also employed: a dye-CNC flexible self-supported thick-film (70 µm) random laser made by drop casting of the C N C s + R h 6 G + h y d r o x y p r o p y l cellulose suspension. In relation to conventional scatterers, the biodegradable cellulose nanocompounds showed a comparable reduction in both the spectral full width at half-maximum and the energy threshold values, with an optimal concentration of 5 mg [CNC]/ml[EG] in suspension. Its performance was also compared with other cellulose-based random lasers, presenting advantages for some parameters. The flexible film configuration showed similar results, but contained 10% less Rh6G than the suspension.

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