TY - JOUR
T1 - Inverse Optical Torques on Dielectric Nanoparticles in Elliptically Polarized Light Waves
AU - Shi, Yuzhi
AU - Zhu, Tongtong
AU - Liu, Ai Qun
AU - Zhou, Lei Ming
AU - Nieto-Vesperinas, Manuel
AU - Hassanfiroozi, Amir
AU - Liu, Jingquan
AU - Tsai, Din Ping
AU - Li, Zhenyu
AU - Ding, Weiqiang
AU - Wang, Fan
AU - Li, Hang
AU - Song, Qinghua
AU - Xu, Xiaohao
AU - Li, Baojun
AU - Cheng, Xinbin
AU - Wu, Pin Chieh
AU - Chan, Che Ting
AU - Qiu, Cheng Wei
N1 - Publisher Copyright:
© 2022 American Physical Society.
PY - 2022/7/29
Y1 - 2022/7/29
N2 - Elliptically polarized light waves carry the spin angular momentum (SAM), so they can exert optical torques on nanoparticles. Usually, the rotation follows the same direction as the SAM due to momentum conservation. It is counterintuitive to observe the reversal of optical torque acting on an ordinary dielectric nanoparticle illuminated by an elliptically or circularly polarized light wave. Here, we demonstrate that negative optical torques, which are opposite to the direction of SAM, can ubiquitously emerge when elliptically polarized light waves are impinged on dielectric nanoparticles obliquely. Intriguingly, the rotation can be switched between clockwise and counterclockwise directions by controlling the incident angle of light. Our study suggests a new playground to harness polarization-dependent optical force and torque for advancing optical manipulations.
AB - Elliptically polarized light waves carry the spin angular momentum (SAM), so they can exert optical torques on nanoparticles. Usually, the rotation follows the same direction as the SAM due to momentum conservation. It is counterintuitive to observe the reversal of optical torque acting on an ordinary dielectric nanoparticle illuminated by an elliptically or circularly polarized light wave. Here, we demonstrate that negative optical torques, which are opposite to the direction of SAM, can ubiquitously emerge when elliptically polarized light waves are impinged on dielectric nanoparticles obliquely. Intriguingly, the rotation can be switched between clockwise and counterclockwise directions by controlling the incident angle of light. Our study suggests a new playground to harness polarization-dependent optical force and torque for advancing optical manipulations.
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U2 - 10.1103/PhysRevLett.129.053902
DO - 10.1103/PhysRevLett.129.053902
M3 - Article
C2 - 35960581
AN - SCOPUS:85135718368
SN - 0031-9007
VL - 129
JO - Physical review letters
JF - Physical review letters
IS - 5
M1 - 053902
ER -