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Electrically controlled white laser emission through liquid crystal/polymer multiphases.

ABSTRACT: White lasers are becoming increasingly relevant in various fields since they exhibit unprecedented properties in terms of beam brightness and intensity modulation. Here we introduce a white laser based on a polymer matrix encompassing liquid crystals and multiple organic chromophores in a multifunctional phase-separation system. The separation of the hydrophilic matrix and the hydrophobic liquid crystals leads to the formation of a complex optically active layer, featuring lasing emission tuneable from blue to red. White laser emission is found with an optical excitation threshold of approximately 12?mJ/cm2. Importantly, an external electric field can be used to control the device emission intensity. White lasers with low-voltage (?10?V) controllable emission might pave the way for a new generation of broadband light sources for analytical, computational, and communication applications.

SUBMITTER: Adamow A

PROVIDER: S-EPMC7012818 | biostudies-literature | 2020

REPOSITORIES: biostudies-literature

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Electrically controlled white laser emission through liquid crystal/polymer multiphases.

Adamow Alina A Szukalski Adam A Sznitko Lech L Persano Luana L Pisignano Dario D Camposeo Andrea A Mysliwiec Jaroslaw J

Light, science & applications 20200211

White lasers are becoming increasingly relevant in various fields since they exhibit unprecedented properties in terms of beam brightness and intensity modulation. Here we introduce a white laser based on a polymer matrix encompassing liquid crystals and multiple organic chromophores in a multifunctional phase-separation system. The separation of the hydrophilic matrix and the hydrophobic liquid crystals leads to the formation of a complex optically active layer, featuring lasing emission tuneab ...[more]

PMID: 32128159

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