PROBLEM TO BE SOLVED: To efficiently intensify Raman scattered light to enhance precision for a Raman spectroscopy. SOLUTION: An objective substance is adsorbed on a surface of a device having structure formed with a plurality of micropores on a metal film having 50-200nm of thickness on a dielectric substrate, and the Raman spectroscopy is executed thereunder. A pore size of the micropore and a period thereof are determined in response to a wavelength of an irradiation light to obtain a light confinement effect. The irradiated light is utilized to the maximum by confining the light in the device, intensity of an electric field generated in a periphery gets maximum, and the Raman scattered light is intensified remarkably by the electric field. COPYRIGHT: (C)2005,JPO&NCIPI
