Resonant periodic structures and methods of using them as filters and sensors

A technology of periodic structures and light beams, applied in the direction of material analysis, instruments, scientific instruments, etc. using sound waves/ultrasonic waves/infrasonic waves

Active Publication Date: 2018-05-11
PHOTONICSYS
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  • Abstract
  • Description
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Problems solved by technology

This optical setup includes: (a) a periodic structure; (b) a layer of plasmonic nanoparticles spread on top of the periodic structure; (c) a protective layer for the case of top surface materials susceptible to analyte material (d) a functionalized layer that acts as a binding layer for biological or chemical entities in the analyte in conta...

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  • Resonant periodic structures and methods of using them as filters and sensors
  • Resonant periodic structures and methods of using them as filters and sensors
  • Resonant periodic structures and methods of using them as filters and sensors

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Embodiment Construction

[0055] In the following description, various aspects of the application will be described. For purposes of explanation, specific configurations and details are set forth in order to provide a thorough understanding of the application. It will also be apparent, however, to one skilled in the art that the present application may be practiced without the specific details presented herein. Furthermore, well-known features may be omitted or simplified in order not to obscure the application.

[0056]In one aspect, the optical device of the present application comprises: (a) a periodic structure; (b) a layer of plasmonic nanoparticles spread on top of the periodic structure; (c) a top surface material for the analyte material susceptible (d) a functionalized layer, which acts as a binding layer for biological or chemical entities in the analyte in contact with the functionalized layer; (e) a quasi-monochromatic linearly polarized beam, which in the plane of incidence has a (f) a s...

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Abstract

The invention relates to the field of surface waves based optical devices particularly tuneable optical filter, optical biosensors and spatial light modulators. An optical sensor and tuneable filter is disclosed based on high contrast periodic structures deposited on a substrate and using a compact reading method for low detection limit using a one dimensionally diverging quasi-monochromatic beamand a camera.

Description

technical field [0001] The present invention relates to the field of surface wave based optical devices, in particular, tunable optical filters, optical biosensors and spatial light modulators. Background technique [0002] Periodic structures exhibit various optical phenomena that are very promising for optical sensing and tunable filtering, as well as other photonic applications. One of the well known periodic structures uses one-, two- or three-dimensional gratings. A good example of such a structure is a metal grating structure, which can excite surface plasmon resonances that are sensitive to the refractive index of the analyte material adjacent to the surface, and thus can be used for biosensing or tunable optical filtering ( Figure 1a ). One of the inventor's patent applications published as WO 2012 / 111001 A2 is based on such ultra-thin metal gratings (<60 nm) which allow excitation of two SP waves, one of which is used as a reference, as in Figure 1b shown. ...

Claims

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Application Information

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IPC IPC(8): G01N21/00G01N29/00
CPCG01N21/554G01N21/774G01N21/7743G01N21/4788G01N21/00G01N29/00
Inventor 易卜拉辛·阿卜杜勒哈利姆
Owner PHOTONICSYS
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