Metrology with a twist: probing and sensing with vortex light

Optical metrology is a well-established subject, dating back to early interferometry techniques utilizing light's linear momentum through fringes. In recent years, significant interest has arisen in using vortex light with orbital angular momentum (OAM), where the phase twists around a singular vortex in space or time. This has expanded metrology's boundaries to encompass highly sensitive chiral interactions between light and matter, three-dimensional motion detection via linear and rotational Doppler effects, and modal approaches surpassing the resolution limit for improved profiling and quantification. The intricate structure of vortex light, combined with the integration of artificial intelligence into…

• NN
  National Natural Science Foundation of China

  Awards: 61621005, U20B2059, 62231021, 61621005, 62201613, U20B2059, 62231021, 62201613, B17035
• HE
  Higher Education Discipline Innovation Project

  Awards: 61621005, B17035
• SA
  Shanghai Aerospace Science and Technology Innovation Foundation

  Award: SAST-2022-069