Pure optical twist with zero net torque

Han, Zhenyu1; Zhang, Lei2,3; Li, Xiao4; Li, Yaxin1; Qu, Tiantao1; Yu, Xinning5; Yu, Xudong6; Ng, Jack4; Lin, Zhifang7,8,9; Chen, Jun1,3

2024-02-26

10.1364/OE.518075

OPTICS EXPRESS   影响因子和分区

1094-4087

In photonic systems, bilayer or multilayer systems exhibit numerous exciting phenomena induced by twisting. Thus, it is highly desired to explore the twisting effect by engineering the light -matter interactions. Optical torque, an important means in optical micromanipulation, can rotate micro -objects in various ways, enabling a wide range of promising applications. In this study, we present an interesting phenomenon called "pure optical twist" (POT), which emerges when a bilayer structure with specific symmetry is illuminated by counter -propagating lights with opposite spin and/or orbital angular momentum. Remarkably, this leads to zero net optical torque but yet possesses an interesting mechanical effect of bilayer system twisting. The crucial determinant of this phenomenon is the rotational symmetries of each layer, which govern the allowed azimuthal channels of the scattered wave. When the rotational symmetries do not allow these channels to overlap, no resultant torque is observed. Our work will encourage further exploration of the twisting effect through engineered light -matter interactions. This opens up the possibility of creating twisted bilayer systems using optical means, and constructing a stable bilayer optical motor that maintains identical rotation frequencies for both layers. (c) 2024 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement

SCI ; EI

英语

通讯

National Natural Science Foundation of China["12074084","12074230","202103021222001"] ; Fundamental Research Program of Shanxi Province[20200925152152003] ; Stable Support Plan Program of Natural Science Foundation of Shenzhen Municipality[J20230003] ; Program of Education and Teaching Reform in Shanxi Province[12174231] ; null[12074169]

Optics

Optics

WOS:001201957100001

Optica Publishing Group

PHYSICS

Web of Science

1.Shanxi Univ, Inst Theoret Phys, State Key Lab Quantum Opt & Quantum Opt Devices, Taiyuan, Peoples R China
2.Shanxi Univ, Inst Laser Spect, State Key Lab Quantum Opt & Quantum Opt Devices, Taiyuan, Peoples R China
3.Shanxi Univ, Collaborat Innovat Ctr Extreme Opt, Taiyuan, Peoples R China
4.Southern Univ Sci & Technol, Dept Phys, Shenzhen, Guangdong, Peoples R China
5.Zhejiang Univ Sci & Technol, Sch Sci, Hangzhou, Zhejiang, Peoples R China
6.Shanxi Univ, Inst Optoelect, State Key Lab Quantum Opt & Quantum Opt Devices, Taiyuan, Peoples R China
7.Fudan Univ, State Key Lab Surface Phys, Key Lab Micro & Nano Photon Struct, \, Shanghai, Peoples R China
8.Fudan Univ, Dept Phys, Shanghai, Peoples R China
9.Nanjing Univ, Collaborat Innovat Ctr Adv Microstruct, Nanjing, Peoples R China

Han, Zhenyu,Zhang, Lei,Li, Xiao,et al. Pure optical twist with zero net torque[J]. OPTICS EXPRESS,2024,32(5).

Han, Zhenyu.,Zhang, Lei.,Li, Xiao.,Li, Yaxin.,Qu, Tiantao.,...&Chen, Jun.(2024).Pure optical twist with zero net torque.OPTICS EXPRESS,32(5).

Han, Zhenyu,et al."Pure optical twist with zero net torque".OPTICS EXPRESS 32.5(2024).