Issue 21, 2015

Enhancement of pump efficiency for an organic distributed feedback laser based on a holographic polymer dispersed liquid crystal as an external light feedback layer

Abstract

We report a low threshold, high energy conversion organic distributed feedback (DFB) laser based on a holographic polymer dispersed liquid crystal (HPDLC) grating as an external light feedback layer, specifically, by adopting an acrylate-based monomer with low functionality and a rubbed polyimide (PI) alignment layer. In such configuration, the phase separated LCs were aligned along the preferred direction, which gave an increased refractive index difference between the LC and the polymer, so it can provide better light feedback in the HPDLC layer. The pump efficiency for the laser, such as lasing output threshold and conversion efficiency, can be enhanced. The light loss, diffraction efficiency and driving voltage were also investigated for the HPDLC structures to identify the effects of the rubbing layer and monomer functionality.

Graphical abstract: Enhancement of pump efficiency for an organic distributed feedback laser based on a holographic polymer dispersed liquid crystal as an external light feedback layer

Article information

Article type
Paper
Submitted
15 Mar 2015
Accepted
24 Apr 2015
First published
08 May 2015

J. Mater. Chem. C, 2015,3, 5566-5572

Author version available

Enhancement of pump efficiency for an organic distributed feedback laser based on a holographic polymer dispersed liquid crystal as an external light feedback layer

L. Liu, L. Xuan, G. Zhang, M. Liu, L. Hu, Y. Liu and J. Ma, J. Mater. Chem. C, 2015, 3, 5566 DOI: 10.1039/C5TC00731C

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