| 摘要 |
A sensor chip (1, 1001) comprises a substrate (10) that has a planar portion (10s) and a diffraction grating (9) on which a target substance can be placed. The diffraction grating (9) is formed on the planar portion (10s), has a surface formed from a metal and includes a plurality of first protrusions (11) periodically arranged in a period equal to or greater than 100 nm and equal to or less than 1000 nm in a first direction that is parallel to the planar portion (10s), a plurality of base portions (10a) each located between two of the first protrusions (11) adjacent to each other, wherein the base portions (10a) configure a base of the substrate, and a plurality of second protrusions (12) formed on upper faces of the plurality of the first protrusions (11). |
