Manipulation of Polarized Random Lasers from Dye-Doped Twisted Nematic Liquid Crystals Within Wedge Cells

Sheng-Hung Lin; Po-Yen Chen; Yi-Han Li; Chien-Hsing Chen; Ja-Hon Lin; Yao-Hui Chen; Shwu-Yun Tsay; Jin-Jei Wu

doi:10.1109/JPHOT.2017.2689064

IEEE Photonics Journal (Jan 2017)

Manipulation of Polarized Random Lasers from Dye-Doped Twisted Nematic Liquid Crystals Within Wedge Cells

Sheng-Hung Lin,
Po-Yen Chen,
Yi-Han Li,
Chien-Hsing Chen,
Ja-Hon Lin,
Yao-Hui Chen,
Shwu-Yun Tsay,
Jin-Jei Wu

Affiliations

Sheng-Hung Lin: Department of Electro-Optical Engineering, National Taipei University of Technology, Taipei, Taiwan
Po-Yen Chen: Department of Electro-Optical Engineering, National Taipei University of Technology, Taipei, Taiwan
Yi-Han Li: Department of Electro-Optical Engineering, National Taipei University of Technology, Taipei, Taiwan
Chien-Hsing Chen: Department of Electro-Optical Engineering, National Taipei University of Technology, Taipei, Taiwan
Ja-Hon Lin: Department of Electro-Optical Engineering, National Taipei University of Technology, Taipei, Taiwan
Yao-Hui Chen: Department of Electro-Optical Engineering, National Taipei University of Technology, Taipei, Taiwan
Shwu-Yun Tsay: Department of Electro-Optical Engineering, National Taipei University of Technology, Taipei, Taiwan
Jin-Jei Wu: Department of Electro-Optical Engineering, National Taipei University of Technology, Taipei, Taiwan

DOI: https://doi.org/10.1109/JPHOT.2017.2689064
Journal volume & issue: Vol. 9, no. 2
pp. 1 – 8

Abstract

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The characteristics of polarized random lasers (RLs), made from dye-doped twisted nematic liquid crystals (DD-TNLCs) in a wedge cell, have been investigated. Regardless of the multiple light scattering within disordered LCs inside the cell, the output polarization is compulsorily determined by the rubbing direction of PI on glass plate. Moreover, the output intensity of the RLs can be manipulated by the orientation of the linear pump polarization relative to the rubbing direction of polyimide on the incident glass plane. Through thermal control, the resonance characteristics of the RLs can be altered to generate the highest slope efficiency and lowest lasing threshold at 25 °C. The measured results indicate abundant and intriguing optical and physical properties of the DD-TNLC laser.

Published in IEEE Photonics Journal

ISSN: 1943-0655 (Online)
Publisher: IEEE
Country of publisher: United States
LCC subjects: Technology: Engineering (General). Civil engineering (General): Applied optics. Photonics; Science: Physics: Optics. Light
Website: http://ieeexplore.ieee.org/xpl/RecentIssue.jsp?punumber=4563994

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