On-chip optical levitation with a metalens in vacuum

Kunhong Shen, Yao Duan, Peng Ju, Zhujing Xu, Xi Chen, Lidan Zhang, Jonghoon Ahn, Xingjie Ni, Tongcang Li

Research output: Contribution to journalArticlepeer-review

33 Scopus citations


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.

Original languageEnglish (US)
Pages (from-to)1359-1362
Number of pages4
Issue number11
StatePublished - Nov 2021

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics


Dive into the research topics of 'On-chip optical levitation with a metalens in vacuum'. Together they form a unique fingerprint.

Cite this