Sensor using long range surface plasmon resonance with diffraction double-grating
First Claim
1. A long range surface plasmon resonance sensor for detecting molecules in a liquid solution comprising:
- a first dielectric medium;
a second dielectric medium having an effective index of refraction approximately matching said first dielectric medium;
a double-grating structure between said first dielectric medium and said second dielectric medium;
the second dielectric medium including,a first organic layer of molecules bound to said double-grating structure specific for said molecules that are to be detected,means for introducing into the first dielectric medium a beam of electromagnetic radiation in a manner which causes long range surface plasmon resonance to occur whereby said beam of radiation suffers attenuated total reflection; and
a detector for detecting the attenuated total reflectance of the long range surface plasmon resonance as a function of the formation of a second organic layer of molecules on said first organic layer as the molecules in the liquid solution bind to the molecules of the first organic layer.
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Abstract
A long range surface plasmon resonance sensor for use in biological, biochemical or chemical testing. The sensor includes a first dielectric medium and a second dielectric medium having an index of refraction approximately matching the first dielectric medium. A double-grating structure is located between the first dielectric medium and the second dielectric medium. A beam of electromagnetic radiation is introduced into the second dielectric medium in a manner which causes long range surface plasmon resonance to occur such that the beam of radiation suffers attenuated total reflection. The characteristics of the resonance dependent upon the reaction between the bonding layer and the targeted bonding molecule are then detected.
132 Citations
20 Claims
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1. A long range surface plasmon resonance sensor for detecting molecules in a liquid solution comprising:
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a first dielectric medium; a second dielectric medium having an effective index of refraction approximately matching said first dielectric medium; a double-grating structure between said first dielectric medium and said second dielectric medium; the second dielectric medium including, a first organic layer of molecules bound to said double-grating structure specific for said molecules that are to be detected, means for introducing into the first dielectric medium a beam of electromagnetic radiation in a manner which causes long range surface plasmon resonance to occur whereby said beam of radiation suffers attenuated total reflection; and a detector for detecting the attenuated total reflectance of the long range surface plasmon resonance as a function of the formation of a second organic layer of molecules on said first organic layer as the molecules in the liquid solution bind to the molecules of the first organic layer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A long range surface plasmon resonance sensor for detecting molecules in a liquid solution comprising:
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a first dielectric medium; a second dielectric medium having an effective index of refraction approximately matching said first dielectric medium; a double-grating structure including a metal film no greater than about 20 nm thick between said first dielectric medium and said second dielectric medium; the second dielectric medium including, a first organic layer of molecules bound to the metal film specific for said molecules that are to be detected, means for introducing into the first dielectric medium a beam of electromagnetic radiation in a manner which causes long range surface plasmon resonance to occur whereby said beam of radiation suffers attenuated total reflection; and a detector for detecting the attentuated total reflectance of the long range surface plasmon resonance as a function of the formation of a second organic layer of molecules on said first organic layer as the molecules in the liquid solution bind to the molecules of the first organic layer. - View Dependent Claims (19)
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20. A long range surface plasmon resonance sensor for detecting molecules in a liquid solution comprising:
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a first dielectric medium; a second dielectric medium having an effective index of refraction approximately matching said first dielectric medium; said second dielectric medium including, a first organic layer of molecules specific for said molecules that are to be detected, a double-grating structure including a metal film no greater than about 20 nm thick between said first dielectric medium and said second dielectric medium; means for introducing into the first dielectric medium a beam of electromagnetic radiation in a manner which causes long range surface plasmon resonance to occur whereby said beam of radiation suffers attentuated total reflection; and a detector for detecting the attenuated total reflectance of the long range surface plasmon resonance as a function of the formation of a second organic layer of molecules on said first organic layer as the molecules in the liquid solution bind to the molecules of the first organic layer.
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Specification