Force field gradient measurement device and method based on double-vibrator suspension photomechanical system

Abstract

The invention discloses a force field gradient measurement device and a method based on a double-vibrator suspension photomechanical system. The measurement device sequentially comprises a laser, an optical cavity, first optical tweezers, second optical tweezers and a light field detection device, and first nanoparticles and second nanoparticles are arranged in the middle of the optical cavity; the optical axis of the laser coincides with the optical axis of the optical cavity, and the laser enters from the left side of the optical cavity and is excited in the optical cavity to form a stable standing wave field. The first optical tweezers and the second optical tweezers are used for suspending corresponding first nanoparticles and second nanoparticles in the optical cavity respectively and adjusting the positions of the first nanoparticles and the second nanoparticles along the optical axis; the light field detection device is used for detecting cavity transmission light of the optical cavity so as to obtain force difference information. According to the gradient measurement method, the instantaneous gradient of the force field can be detected, and the dynamic change of the field can be monitored. The method is not only suitable for gravitational fields, but also suitable for acceleration fields, electric fields and the like. Development and application of suspension photomechanics in the field detection and multi-point sensing field can be promoted.

Description

technical field [0001] The invention relates to force field gradient measurement, in particular to a force field gradient measurement device and method based on a double vibrator suspension optomechanical system. Background technique [0002] Since Arthur Ashkin invented optical tweezers in the 1970s, optical tweezers have been widely used in biology, materials science, quantum physics and other fields as a useful tool for manipulating nanoscale objects. The suspended optomechanical system formed by using optical tweezers to suspend nanoscale particles can overcome the noise caused by mechanical support and has ultra-high detection sensitivity. The suspended optomechanical system also has super control ability and can flexibly control the position and state of nanoparticles (mechanical oscillators). These advantages make the suspended optomechanical system one of the hot research directions in the field of precision measurement and sensing in recent years. [0003] The det...

AI Technical Summary

Problems solved by technology

Since there is only one mechanical vibrator, the detection device based on the single-oscillator suspension optomechanical system can only detect the force information of a certain spatial position at a time, but cannot simultaneously obtain the force information of multiple spatial positions, so the force field gradient detection cannot be realized

Even by changing the position of the mechanical vibrator for multiple measurements, only the force information of different spatial positions at different times can be obtained, but the instantaneous gradient of the force field cannot be detected.

Images