文献类型：期刊文献

英文题名：Light-reconfigured waveband-selective diffraction device enabled by micro-patterning of a photoresponsive self-organized helical superstructure

作者：Sun, Pei-zhi[1];Liu, Zhen[1];Wang, Wei[1];Ma, Ling-ling[2,3];Shen, Dong[1];Hu, Wei[2,3];Lu, Yanqing[2,3];Chen, Lujian[4];Zheng, Zhi-gang[1,2,3]

机构：[1]East China Univ Sci & Technol, Dept Phys, 130 Meilong Rd, Shanghai 200237, Peoples R China;[2]Nanjing Univ, Natl Lab Solid State Microstruct, Nanjing 210093, Jiangsu, Peoples R China;[3]Nanjing Univ, Coll Engn & Appl Sci, Nanjing 210093, Jiangsu, Peoples R China;[4]Xiamen Univ, Dept Elect Engn, Sch Informat Sci & Engn, Xiamen 361005, Peoples R China

年份：2016

卷号：4

期号：39

起止页码：9325

外文期刊名：JOURNAL OF MATERIALS CHEMISTRY C

收录：;EI(收录号：20164202922651);WOS:【SCI-EXPANDED(收录号:WOS:000386862900025)】；

基金：This study is sponsored by the National Science Foundation of China (No. 61435008, 61575063), the "Chen-guang" Talent Foundation of Shanghai Education and Development Committee (No. 12CG32), and the Foundation of Laboratory of Solid State Microstructures, Nanjing University (No. M27005).

语种：英文

外文关键词：Infrared devices - Liquid crystal polymers - Incident light - Nematic liquid crystals - Reflection - Modulation

摘要：A waveband-selective diffraction device, possessing dynamic and reversible light manipulation of its waveband-selectivity within a wide spectral range (similar to 140 nm), was developed by micro-patterning of a photoresponsive self-organized helical liquid crystal superstructure. Distinct from a conventional liquid crystal diffraction device, applied in a wide band from ultraviolet to near infrared wherein the diffracting light is due to the alternate phase modulation caused by the difference on liquid crystal arrangement, herein, the diffraction was mainly induced by an alternate transmittance/reflectance (i.e., amplitude) modulation to an incident light with a certain wavelength located in a selective reflection band of a binary patterned helical liquid crystal layer, producing diffraction both on the transmission and reflection sides of the sample. The waveband-selectivity was determined and manipulated by appropriately controlling the reflection band of the patterned helical liquid crystals. A prominent advantage compared to the majority of other liquid crystal polymer based devices is the electric responsiveness of such a device in addition to its photoresponsiveness. Moreover, an excellent light reconfiguration, exhibiting an erasing of the grating, followed by a rewriting of a Fresnel zone plate was achieved.