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Optical biosensor based on two-port microcavity laser space interference

A biosensor, laser technology, applied in the field of optical biosensors, can solve problems such as unfavorable application integration

Inactive Publication Date: 2012-06-27
INST OF SEMICONDUCTORS - CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The main purpose of the present invention is to provide an optical biosensor based on the spatial interference of two-port microcavity lasers, which uses the spatial coherence of two-port single-mode microcavity lasers to realize the detection of antibodies in biology by the sensor to solve the problem of optical biosensors. The sensor needs an external light source, which is not conducive to application integration

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  • Optical biosensor based on two-port microcavity laser space interference
  • Optical biosensor based on two-port microcavity laser space interference
  • Optical biosensor based on two-port microcavity laser space interference

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Embodiment Construction

[0023] see figure 1 As shown, the present invention provides a kind of optical biosensor based on two-port microcavity laser spatial interference, comprising:

[0024] A microcavity laser 1, the microcavity laser 1 is a room temperature electric injection laser, which can realize continuous current injection lasing at room temperature (18-25°C). Laser types can be solid-state lasers, liquid lasers, gas lasers and semiconductor lasers, where the substrates of semiconductor lasers can be silicon, gallium arsenic, indium phosphide and sapphire substrates, and the active layer can be double heterojunction, quantum well and quantum dot structure. The resonant cavity of the laser can be a Fabry-Perot cavity, a photonic crystal cavity and a whispering gallery type cavity, and the shape of the whispering gallery type cavity can be a circle, a coupled double circle, an ellipse, a spiral, a triangle, a square and hexagon. Figure 4 is the power-current curve of a two-port quantum wel...

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Abstract

The invention relates to an optical biosensor based on the two-port microcavity laser space interference. The optical biosensor comprises: a microcavity laser, wherein the microcavity laser is a room temperature electrical injection laser, and output laser has a high side mode suppression ratio has good single mode characteristics; a first output port and a second output port which are directly connected to the microcavity laser; a container which is positioned on the microcavity laser and has an upper cover; a transparent slice which is positioned in the lower part of the container, aligns at positions of the first output port and the second output port, and does not absorb emergent lights of the laser; and a CCD camera which is positioned on the upper cover of the container and is used for observing interference fringes.

Description

technical field [0001] The invention relates to the technical field of semiconductor optoelectronic devices, in particular to an optical biosensor based on spatial interference of two-port microcavity lasers. Background technique [0002] As a new type of optoelectronic device, optical biosensor has the advantages of small size, no electromagnetic field interference and remote sensing characteristics. It is widely used in molecular biology, environmental safety detection, medical diagnosis and health care, and has caused great research interest. interest. Optical biosensors can be roughly divided into two categories: optical biosensors based on fluorescence detection and optical biosensors based on label-free detection. Optical biosensors based on fluorescence detection require cumbersome processing and will affect the detected object; while optical biosensors based on non-labeled detection have the advantages of being easy to implement, not affecting the detected object, a...

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Application Information

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IPC IPC(8): G01N21/45
Inventor 林建东黄永箴杨跃德肖金龙姚齐峰吕晓萌杜云
Owner INST OF SEMICONDUCTORS - CHINESE ACAD OF SCI