Efficient visible light modulation based on electrically tunable all dielectric metasurfaces embedded in thin-layer nematic liquid crystals

Sun, Mingyu1,2; Xu, Xuewu2; Sun, Xiao Wei3; Liang, Xin'an2; Valuckas, Vytautas2; Zheng, Yuanjin1; Paniagua-Dominguez, Ramon2; Kuznetsov, Arseniy, I2

2019-06-17

10.1038/s41598-019-45091-5

Scientific Reports   影响因子和分区

2045-2322

All-dielectric metasurfaces have attracted attention for highly efficient visible light manipulation. So far, however, they are mostly passive devices, while those allowing dynamic control remain a challenge. A highly efficient tuning mechanism is immersing the metasurface in a birefringent liquid crystal (LC), whose refractive index can be electrically controlled. Here, an all-dielectric tunable metasurface is demonstrated based on this concept, operating at visible frequencies and based on TiO2 nanodisks embedded in a thin LC layer. Small driving voltages from 3 similar to 5V are sufficient to tune the metasurface resonances, with an associated transmission modulation of more than 65%. The metasurface optical responses, including the observed electric and magnetic dipole resonance shifts as well as the interfacial anchoring effect of the LC induced by the presence of the nanostructures, are systematically discussed. The dynamic tuning observed in the transmission spectra can pave the way to dynamically tunable metasurface devices for efficient visible light modulation applications.

SCI

英语

其他

National Research Foundation of Singapore[NRF-CRP11-2012-01] ; National Research Foundation of Singapore[NRF-NRFI2017-01]

Science & Technology - Other Topics

Multidisciplinary Sciences

WOS:000471760200021

NATURE PUBLISHING GROUP

Web of Science

1.Nanyang Technol Univ, Sch Elect & Elect Engn, 50 Nanyang Ave, Singapore 639798, Singapore
2.ASTAR, Inst Mat Res & Engn, 2 Fusionopolis Way, Singapore 138634, Singapore
3.South Univ Sci & Technol China, Dept Elect & Elect Engn, Coll Engn, 1088 Xue Yuan Rd, Shenzhen 518055, Guangdong, Peoples R China

Sun, Mingyu,Xu, Xuewu,Sun, Xiao Wei,et al. Efficient visible light modulation based on electrically tunable all dielectric metasurfaces embedded in thin-layer nematic liquid crystals[J]. Scientific Reports,2019,9.

Sun, Mingyu.,Xu, Xuewu.,Sun, Xiao Wei.,Liang, Xin'an.,Valuckas, Vytautas.,...&Kuznetsov, Arseniy, I.(2019).Efficient visible light modulation based on electrically tunable all dielectric metasurfaces embedded in thin-layer nematic liquid crystals.Scientific Reports,9.

Sun, Mingyu,et al."Efficient visible light modulation based on electrically tunable all dielectric metasurfaces embedded in thin-layer nematic liquid crystals".Scientific Reports 9(2019).