On-chip optical levitation with a metalens in vacuum
On-chip optical levitation with a metalens in vacuum
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DOI：
10.1364/optica.438410
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发表时间：
2021-11-20
期刊：
影响因子：
10.4
通讯作者：
Li, Tongcang
中科院分区：
文献类型：
--
作者：
Shen, Kunhong;Duan, Yao;Li, Tongcang
电介质粒子在真空中的光学悬浮是精密测量、基础物理测试和量子信息科学的强大技术。传统的光镊需要庞大的光学元件来捕获和检测。在这里，我们设计并制作了一个高数值孔径为0.88在1064 nm的超透镜在真空中。它由500 nm厚的硅纳米天线组成，与真空兼容。我们演示了纳米粒子在真空中的光学悬浮与一个单一的超透镜。通过改变激光功率和偏振态可以调节俘获频率。我们也转移悬浮纳米粒子之间的两个单独的光镊。在真空中使用超透镜的光学悬浮为包括片上传感在内的广泛应用提供了机会。这种超透镜也将用于捕获超冷原子和分子。(C)根据OSA开放获取出版协议的条款，2021年美国光学学会
Optical levitation of dielectric particles in vacuum is a powerful technique for precision measurements, testing fundamental physics, and quantum information science. Conventional optical tweezers require bulky optical components for trapping and detection. Here, we design and fabricate an ultrathin dielectric metalens with a high numerical aperture of 0.88 at 1064 nm in vacuum. It consists of 500-nm-thick silicon nano-antennas, which are compatible with an ultrahigh vacuum. We demonstrate optical levitation of nanoparticles in vacuum with a single metalens. The trapping frequency can be tuned by changing the laser power and polarization. We also transfer a levitated nanoparticle between two separated optical tweezers. Optical levitation with an ultrathin metalens in vacuum provides opportunities for a wide range of applications including on-chip sensing. Such metalenses will also be useful for trapping ultracold atoms and molecules. (C) 2021 Optical Society of America under the terms of the OSA Open Access Publishing Agreement