OPTICAL DEVICE AND MODULE USING ORBITAL ANGULAR MOMENTUM FOR SENSING AN OBJECT

原文（中文）

An optical device and an optical module using orbital angular momentum (OAM) for sensing an object are provided. The optical device includes a light source configured to emit at least one light beam to the object; an OAM generator configured to generate at least one OAM light beam according to the at least one light beam emitted by the light source and transmit the at least one OAM light beam to the object; a first metasurface configured to receive the at least one reflected OAM light beam reflected by the object and convert the at least one reflected OAM light beam into at least one Gaussian light beam; a second metasurface configured to focus the at least one Gaussian light beam transmitted by the first metasurface on a sensor; and the sensor configured to receive the at least one Gaussian light beam.