A waveguide high-order mode converter

A high-order mode, converter technology, applied in instruments, sound-producing instruments, etc., can solve problems such as cell damage, and achieve the effects of easy acquisition, easy preparation, and simple structure
CN106448651BActive Publication Date: 2019-09-27HARBIN ENG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
HARBIN ENG UNIV
Publication Date
2019-09-27

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Abstract

The invention relates to the technical field of acoustic higher-order mode field excitation and regulation and control, and particularly relates to a waveguide higher-order mode converter which excites a higher-order mode field through a fundamental mode and can adjust the frequency of the mode field. The waveguide higher-order mode converter comprises a cylindrical metal acoustic waveguide, a Bragg waveguide A based on Bragg resonance and a non-Bragg waveguide B based on non-Bragg resonance. The two waveguides are connected through a flange ring. A transmission peak appears in forbidden bands through the mutual effect between the forbidden bands so that the higher-order mode field distributed along the radius is generated, and conversion of acoustic waves from the fundamental mode to the higher-order mode is completed. Most of resistive acoustic applications are conveniently compatible, and the converter can work in all the audible bands. The materials are easy to obtain, the structure is simple and preparation is easy.
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Description

technical field

[0001] The invention relates to the technical field of acoustic high-order mode field excitation and regulation. Specifically, it relates to a waveguide high-order mode converter in which a fundamental mode excites a high-order mode field and can adjust the frequency of the mode field. Background technique

[0002] Non-contact particle trapping has important applications in the fields of biology, physical chemistry, biochemistry and optics. Optical tweezers is a relatively mature technology among them. It can use Bessel beams to capture particles and cells and separate them to achieve particle sorting and classification. However, the application of optical tweezers also has some limitations. High-energy lasers will cause certain damage to cells. Due to the wavelength of light, the size of particles that can be captured is less than 10um, so optical tweezers are often used in light-colored areas of transparent or non-transparent substances. .

[0003] Acous...

Claims

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