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Proceedings Paper

Developing flexible liquid crystal defect mode lasers
Author(s): Taimoor Ali; Jia-De Lin; Yuping Shi; Steve J. Elston; Stephen M. Morris
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Paper Abstract

The challenges associated with developing a flexible defect-mode liquid crystal (LC) laser are addressed in this paper. To begin with, we discuss the process for creating a well-aligned photopolymerized film of chiral nematic LC using various surface alignment layers such as polyvinyl alcohol, sulphonic azo-dye and rubbed polyimide. A single mode flexible defect-mode laser is demonstrated with an excitation threshold fluence of 60μJ/cm2/pulse. In accordance with previous studies, results from simulations based on the 4×4 Berreman model show that the wavelength and the number of laser modes are determined by the thickness of the defect layer. The proposed flexible laser can be used to form lasers that can be integrated into conformable platforms and that can be used to control the beam direction without the need for additional optical components.

Paper Details

Date Published: 31 March 2020
PDF: 13 pages
Proc. SPIE 11303, Emerging Liquid Crystal Technologies XV, 113030Q (31 March 2020); doi: 10.1117/12.2545752
Show Author Affiliations
Taimoor Ali, Univ. of Oxford (United Kingdom)
Jia-De Lin, Univ. of Oxford (United Kingdom)
Yuping Shi, Univ. of Oxford (United Kingdom)
Steve J. Elston, Univ. of Oxford (United Kingdom)
Stephen M. Morris, Univ. of Oxford (United Kingdom)


Published in SPIE Proceedings Vol. 11303:
Emerging Liquid Crystal Technologies XV
Liang-Chy Chien; Dirk J. Broer, Editor(s)

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