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Two-dimensional Wrinkle Resonators for Random Lasing in Organic Glasses.

ABSTRACT: Random lasers consisting of slab waveguides with two-dimensional disordered wrinkling patterns that act as scattering resonators are reported. As active material 2,2',7,7'-tetraphenyl-9,9'-spirobifluorene is used which is sandwiched between an oxidized silicon wafer and a cladding with higher glass transition temperature. Wrinkles with tailorable periodicity have been induced by thermal annealing. Photopumping experiments show the transition from amplified spontaneous emission to a multiple peak laser spectrum with linewidths as low as 0.1 nm, demonstrating the applicability of this approach for random laser design.

SUBMITTER: Hoinka NM

PROVIDER: S-EPMC7015940 | biostudies-literature | 2020 Feb

REPOSITORIES: biostudies-literature

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Two-dimensional Wrinkle Resonators for Random Lasing in Organic Glasses.

Hoinka Nicolai M NM Ostwald Christoph C Fuhrmann-Lieker Thomas T

Scientific reports 20200212 1

Random lasers consisting of slab waveguides with two-dimensional disordered wrinkling patterns that act as scattering resonators are reported. As active material 2,2',7,7'-tetraphenyl-9,9'-spirobifluorene is used which is sandwiched between an oxidized silicon wafer and a cladding with higher glass transition temperature. Wrinkles with tailorable periodicity have been induced by thermal annealing. Photopumping experiments show the transition from amplified spontaneous emission to a multiple peak ...[more]

PMID: 32051460

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