Patent ID: 9389179
Filing Date: 2016-07-12
CPC Classification: G01N

Claim Text:
1. An analysis apparatus, comprising: an electric field enhancing element including a metallic layer, a light-transmissive layer which is disposed on the metallic layer and transmits excitation light, and a plurality of metallic particles disposed on the light-transmissive layer, and arranged in a first direction at a first pitch and arranged in a second direction intersecting with the first direction at a second pitch; a light source configured to irradiate the electric field enhancing element with at least one of linearly polarized light which is polarized in the first direction, linearly polarized light which is polarized in the second direction, and circularly polarized light as the excitation light; and a detector configured to detect light emitted from the electric field enhancing element, wherein an arrangement of the metallic particles satisfies a relationship expression (1): wherein P when a thickness of the light-transmissive layer is G nm, an effective refractive index of the light-transmissive layer is n