Modification of emission wavelength in organic random lasers based on photonic glass

Yujie Chen, Johannes Herrnsdorf, Benoit Jack Eloi Guilhabert, Yanfeng Zhang, Alexander Kanibolotsky, Peter Skabara, Erdan Gu, Nicolas Laurand, Martin Dawson

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Control of the emission wavelength of a random laser (RL) system over a 7-nm waveband is demonstrated using a green-emitting π-conjugated polymer infiltrated into a photonic glass formed by nano/micro-size monodisperse silica spheres. The use of a solution-based conjugated polymer enables the complete filling of the voids within the photonic glass without suffering from quenching and the gain can therefore be maximized. The emission wavelength of these structures is set by a combination of the material system spectral gain and of the transport mean free path, the latter being controlled by the mean diameter of the spheres in the nano-scale range. Transport mean free paths of photons in the RL’s active region are calculated using Mie scattering theory and corroborated with coherent backscattering measurements. Further wavelength modification is also possible by changing the pump spot size and the pump fluence.
Original languageEnglish
Pages (from-to)1129-1135
Number of pages6
JournalOrganic Electronics
Volume13
Issue number7
DOIs
Publication statusPublished - Jul 2012

Keywords

  • random laser
  • π-conjugated polymer
  • photonic glass
  • transport mean free path

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