Patent ID: 9140857
Filing Date: 2015-09-22
Classification: G01N,G02B

Abstract:
1. A double-sided grating waveguide biosensor for detecting one or a plurality of properties of a sample solution, the double-sided grating waveguide biosensor at least comprising: a plastic grating, wherein a surface of the plastic grating is provided with a grating part; a waveguide layer, located on the surface of the plastic grating, wherein a part of the waveguide layer is located on the grating part to form a double-sided grating structure, and the double-sided grating structure comprises two waveguide grating parts corresponding to each other; and a channel chip, located on the waveguide layer, being used to guide in the sample solution, wherein when a light beam is coupled into the waveguide layer via the double-sided grating structure and propagates along the waveguide layer, wherein one of the waveguide grating parts is formed as a first surface of the double-sided grating structure and faces the channel chip, the other is formed as an opposite surface of the double-sided grating structure related to the first surface and faces the plastic gating, wherein a variation of a light beam intensity of the light beam penetrating out of the waveguide layer is detected for enabling the double-sided waveguide biosensor to detect the property of the sample solution.