Patent ID: 8023114

Claim:
A target substance detecting device using localized plasmon resonance comprising a substrate and a plurality of layered structures disposed on a surface of the substrate, each of the plurality of layered structures comprising at least two metal layers and a non-conductive layer, the non-conductive layer being sandwiched by the metal layers, wherein the metal layers are electrically separated from each other and give rise to localized plasmon resonance when receiving light which is emitted from a light source and which propagates in the air, wherein in a planar shape of the metal layers, a maximum distance from one point on an outer periphery to another point on the outer periphery ranges from 10 nm to 1450 nm, wherein the non-conductive layer has a thickness of from 10 nm to 100 nm, and wherein the plurality of layered structures are disposed isolated from each other on the substrate.