Photoerasable and photorewritable spatially-tunable laser based on a dye-doped cholesteric liquid crystal with a photoisomerizable chiral dopant

被引：19

作者：

Lin, Shih-Hung ^{[1
,2
]}

Shyu, Cang-Yi ^{[1
,2
]}

Liu, Jui-Hsiang ^{[3
]}

Yang, Po-Chih ^{[4
]}

Mo, Ting-Shan ^{[5
]}

Huang, Shuan-Yu ^{[6
]}

Lee, Chia-Rong ^{[1
,2
]}

机构：

[1] Natl Cheng Kung Univ, Inst Electroopt Sci & Engn, Tainan 701, Taiwan

[2] Natl Cheng Kung Univ, Adv Optoelect Technol Ctr, Tainan 701, Taiwan

[3] Natl Cheng Kung Univ, Dept Chem Engn, Tainan 701, Taiwan

[4] Yuan Ze Univ Chung Li, Dept Chem Engn & Mat Sci, Chungli 320, Taiwan

[5] Kun Shan Univ Technol, Dept Elect Engn, Tainan 710, Taiwan

[6] Chung Shan Med Univ, Sch Optometry, Taichung 402, Taiwan

来源：

OPTICS EXPRESS | 2010年 / 18卷 / 09期

关键词：

PHOTONIC CRYSTAL; BAND; EDGE;

D O I：

10.1364/OE.18.009496

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

This study investigates, for the first time, a photoerasable and photorewritable spatially-tunable laser using a dye-doped cholesteric liquid crystal (DDCLC) with a photoisomerizable chiral dopant (AzoM). UV illumination via a photomask with a transmittance-gradient can create a pitch gradient in the cell such that the lasing wavelength can be spatially tuned over a wide band of 134nm. The pitch gradient is generated by the UV-irradiation-induced gradient of the cis-AzoM concentration and therefore the induced gradient of the cell HTP value, resulting in the spatial tunability of the laser. Furthermore, the laser has advantages of photoerasability and photorewritability. The spatial tunability of the laser can undergo more than 100 cycles of photoerasing and photorewriting processes without decay or damage. (C) 2010 Optical Society of America

引用

页码：9496 / 9503

页数：8