文献类型：期刊文献

英文题名：Heliconical Cholesterics Endows Spatial Phase Modulator with an Electrically Customizable Working Band

作者：Xu, Chun-Ting[1,2];Liu, Bing-Hui[3];Peng, Cheng[1,2];Chen, Quan-Ming[1,2];Chen, Peng[1,2];Sun, Pei-Zhi[3];Zheng, Zhi-Gang[3];Lu, Yan-Qing[1,2];Hu, Wei[1,2]

机构：[1]Nanjing Univ, Natl Lab Solid State Microstruct, Key Lab Intelligent Opt Sensing & Manipulat, Nanjing 210023, Peoples R China;[2]Nanjing Univ, Coll Engn & Appl Sci, Nanjing 210023, Peoples R China;[3]East China Univ Sci & Technol, Sch Phys, Shanghai 200237, Peoples R China

年份：2022

卷号：10

期号：19

外文期刊名：ADVANCED OPTICAL MATERIALS

收录：;EI(收录号：20223212550928);WOS:【SCI-EXPANDED(收录号:WOS:000835830900001)】；

基金：C.T.X., B.H.L., and C.P. contributed equally to this work. This work was supported by the National Key Research and Development Program of China (No. 2021YFA1202000), the National Natural Science Foundation of China (NSFC) (62035008, 61922038, and 62175101), Natural Science Foundation of Jiangsu Province, Major Project (BK20212004), and Fundamental Research Funds for the Central Universities (021314380189). The authors gratefully thank Dr. Yi-Feng Xiong for his kind assistance with the use of the facilities.

语种：英文

外文关键词：geometric phase; heliconical cholesterics; photoalignment; planar optics

摘要：Multidimensional and large-scale parallel manipulation of light, especially on-demand tailoring of the working frequency and spatial phase front, is highly pursued in modern optics. Here, broadband tunable planar optics is demonstrated by electrically driving the nanohelix of photopatterned heliconical cholesterics. By preprogramming the initial orientation of the helixes using a dynamic-mask photoalignment technique, spatial geometric phases can be arbitrarily encoded to the reflected light in a reconfigurable way. Due to the reversible electrically variant pitch of the heliconical superstructures, the reflective Bragg band can be precisely selected in the range from 380 to 1550 nm. In addition to wavelength selection and geometric phase modulation, spatial amplitude modulation and spin reversion can be further expected. This may offer a platform for full-dimensional manipulation of light, including wavelength/frequency, phase, amplitude, time, and spin, thus upgrading optical information processing techniques.