Patent ID: 8610071
Filing Date: 2013-12-17
Classification: G01N

Abstract:
1. A measuring method comprising: holding a specimen on a flat-plate periodic structure; applying a linearly-polarized electromagnetic wave to the periodic structure: detecting the electromagnetic wave scattered forward or backward by the periodic structure and measuring characteristics of the specimen based on a phenomenon that a dip waveform appearing in a frequency characteristic of the forward-scattered electromagnetic wave or a peak waveform appearing in a frequency characteristic of the backward-scattered electromagnetic wave is changed with the presence of the specimen, wherein the periodic structure comprises plural unit structures having the same shape two-dimensionally and periodically interconnected in a direction of one reference plane, the unit structures have at least one aperture penetrating therethrough in a direction perpendicular to the reference plane, the electromagnetic wave is applied from a direction substantially perpendicular to the reference plane, and the unit structures have a shape that is not mirror-symmetric with respect to an imaginary plane orthogonal to a polarizing direction of the electromagnetic wave.