Self-cooling laser optical tweezers device and method based on two-dimensional light trap

A self-cooling and optical trap technology, applied in the fields of optical engineering and precision measurement, to achieve strong practical effects, high-speed self-cooling, and wide application range
CN109920575AActive Publication Date: 2019-06-21NAT UNIV OF DEFENSE TECH
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Patent Information

Authority / Receiving Office
CN ยท China
Patent Type
Applications(China)
Current Assignee / Owner
NAT UNIV OF DEFENSE TECH
Publication Date
2019-06-21

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Abstract

The invention relates to a self-cooling laser optical tweezers device and method based on a two-dimensional light trap. The light tweezers is combined to a light cavity, and the high-speed self-cooling for capturing ellipsoid particles is realized by utilizing the ellipsoid particles location and the characteristics of the cavity loss; the whole cooling process does not involve to the external feedback control, and is realized through the internal self-feedback of a ring cavity. The device has the advantages of being simple in structure, good in repeatability and strong in practicability. Furthermore, the self-cooling laser optical tweezers device is not limited to the light trap structure and the light path structure, and the applicable range is extremely wide.
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Description

technical field

[0001] The invention relates to a self-cooling laser optical tweezers device and method based on a two-dimensional optical trap, belonging to the field of optical engineering and the field of precision measurement technology. Background technique

[0002] Light has momentum and energy, and the specific performance of light momentum is light force. Two Gaussian laser beams propagating in opposite directions can form a double-beam optical potential well capable of confining micron-scale particles, referred to as a double-beam optical trap. Dual-beam optical traps can realize optical manipulation functions such as optical trapping, optical traction, optical stretching and photo-induced rotation, and have broad application prospects in the field of precision measurement.

[0003] Optical manipulation mainly uses the mechanical effect of light to trap particles in tiny light traps, so that the movement of particles is restricted, which is macroscopic "cooling". ...

Claims

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