Detection of the transverse spin of light by twisting anisotropic particles near an optical nanofiber waveguide
OPTICAL MANIPULATION AND STRUCTURED MATERIALS CONFERENCE 2021(2021)
摘要
In contrast to paraxial waves, strongly confined light can carry significant transverse spin angular momentum. Here we report on its direct detection in the evanescent electromagnetic field near the ultrathin waist of an optical nanofiber waveguide. We demonstrate the spin by its contribution to rotation of an anisotropic microsphere held and spun near the nanofiber waist by optical tweezers. By setting the driving spin angular momentum in the optical tweezers to be parallel or antiparallel with respect to the transverse spin near the nanofiber, we can speed up or slow down the particle's rotation by about a half of the rotation rate observed without the light in the fiber. We also explore the dependence of this optomechanical effect on the propagation direction and polarization of the guided light.
更多查看译文
关键词
transverse spin of light, evanescent field, optical nanofiber, optical manipulation, anisotropy
AI 理解论文
溯源树
样例
![](https://originalfileserver.aminer.cn/sys/aminer/pubs/mrt_preview.jpeg)
生成溯源树,研究论文发展脉络
Chat Paper
正在生成论文摘要