A chip-type microparticle optical suspension device and microparticle capture method

Abstract

The invention discloses a chip-type particle optical suspension device, which is sequentially provided with a drive circuit board, a semiconductor laser, a micro lens group, a wave plate, a particle chamber, and a photoelectric detector; the semiconductor laser is located on the drive circuit board; the micro lens group It is used to focus the scattered beam emitted by the semiconductor laser to form the outgoing light of the Gaussian beam; the wave plate is used to adjust the polarization state of the outgoing light to realize the suspension capture of the microparticles in the microparticle chamber; the photodetector is used to convert the received optical signal into The electrical signal outputs the state information of the particles in the particle chamber; the chip-type particle optical suspension device also includes a ceramic piezoelectric sheet, the vibration of the ceramic piezoelectric sheet drives the particle chamber, and excites the particles in the particle chamber to suspend in the particle chamber.

Description

technical field [0001] The invention relates to the field of optical suspension technology, in particular to a chip-type microparticle optical suspension device and a microparticle capture method. Background technique [0002] Since Ashkin used lasers to successfully manipulate tiny particles and proposed optical levitation technology in the 1980s, this method of using the radiation pressure effect of lasers and using high-focus lenses for non-contact manipulation of micro-particles such as cells has gradually It has become an important method for basic research in physics and biology, and its advantages are that it will not cause mechanical damage to particles and has high capture efficiency and precision. [0003] The application of optical levitation technology is mainly classified into five categories: life science, photonic crystal, surface science and condensed matter physics, micro-manipulation and micro-fabrication, material science and other fields. After the birth...

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Problems solved by technology

[0004] The traditional space optical levitation technology based on the microscopic objective lens uses a high numerical aperture microscopic objective lens, and also requires optical components such as beam collimation devices, coupling devices, and anti-reflection film filters, which makes the optical path of the entire optical levitation system more complex and bulky. However, although the optical fiber and the silicon-based waveguide light suspension device have a simple optical path, are relatively flexible, and have a small main body size, they all use traditional box-type semiconductor lasers, which make the overall size still large and cannot be used in Demand for chip-type devices

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