Optical waveguides – Planar optical waveguide
Patent
1997-11-07
1999-11-23
Healy, Brian
Optical waveguides
Planar optical waveguide
385 11, 385 12, 385141, 356346, 356351, G02B 612, G01B 902
Patent
active
059914882
ABSTRACT:
A conventional SPR spectroscopic device, consisting of a metallic film used with a prism to provide a surface plasmon wave, is modified by coating the film with a dielectric layer. According to one aspect of the invention, such additional layer of dielectric material functions as an optical amplifier that produces an increased sensitivity and enhanced spectroscopic capabilities in SPR. According to another aspect of the invention, the added dielectric layer can be used as a matrix for adsorbing and immobilizing the sensing materials in sensor applications. Furthermore, the dielectric layer provides a shield for both mechanical and chemical protection of the metal layer, thereby preventing the rapid deterioration that commonly accompanies such detectors. In its simplest embodiment, the invention includes only one dielectric layer; in other embodiments, a variety of multi-layer configurations may be implemented for different purposes with diverse dielectric materials.
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Macleod H. Angus
Salamon Zdzislaw
Tollin Gordon
Durando Antonio R.
Healy Brian
The Arizona Board of Regents on behalf of the University of Ariz
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