| 摘要 |
Provided are a localized surface plasmon resonance sensing chip and a localized surface plasmon resonance sensing system using the same, whereby the line width of an absorption spectrum derived from localized plasmon resonance is small and a peak wavelength shift in an optical spectrum that accompanies refractive index variation on a surface can be measured with high precision. A sensing chip 10 has a flat-plate-shaped base 14, a plurality of projections 16, and a metal layer 18 for covering the surface of the plurality of projections 16. The projections 16 are provided with a half oblate spheroid shape which is one of the solids resulting from dividing an oblate spheroid into two equal parts at the equatorial plane thereof, and the projections 16 are arranged so that cleavage planes 16a of the half oblate spheroids face a surface 14a of the base 14. A sensing system has the sensing chip 10, a light source for radiating light to a detection region of the sensing chip 10, and a light detecting device for detecting an optical spectrum of light reflected or transmitted in the detection region of the sensing chip 10. |
