Localized plasmon resonance sensor
AssigneeCanon Kabushiki Kaisha
InventorKoichi Fukuda
Life of this patent
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Abstract
A localized plasmon resonance sensor for detecting a change in optical constant uses a structure including metal. In a response spectrum with respect to light incident on the structure, there are at least two resonance peaks including at least one resonance peak shifted to a longer wavelength side and at least another peak shifted to a shorter wavelength side, by the change in optical constant.
Claims14
A sensing method for detecting a change in an optical constant in an ambient solvent of a nanostructure comprising metal and being capable of localized plasmon resonance, said method comprising:
- detecting the change in the optical constant by detecting a change in each of a pair of plasmon resonance peaks in a response spectrum with respect to light incident on said nanostructure,
- wherein one of said pair of plasmon resonance peaks is shifted to a longer wavelength side by the change in the optical constant in the ambient solvent and the other of said pair of plasmon resonance peaks is shifted to a shorter wavelength side by the change in the optical constant in the ambient solvent,
- wherein at least one of said pair of plasmon resonance peaks is shifted to the shorter wavelength side when a dielectric constant of the ambient solvent is increased and is shifted to the longer wavelength side when the dielectric constant of the ambient solvent is decreased.
A localized plasmon resonance sensor for detecting a change in optical constant of an ambient solvent by using a structure comprising a dielectric material as a core coated with metal as a shell, wherein in a response spectrum with respect to light incident on said structure, there are at least two resonance peaks including at least one resonance peak shifted to a longer wavelength side by the change in optical constant of the ambient solvent and at least another peak shifted to a shorter wavelength side by the change in optical constant of the ambient solvent, and wherein at least one of said at least two resonance peaks is shifted to the shorter wavelength side when a dielectric constant of the ambient solvent is increased and is shifted to the longer wavelength side when the dielectric constant of the ambient solvent is decreased.
Dependencies are inferred from the claim text.