Abstract
Utilizing plasmon resonance, this paper describes a novel detection method of dew condensation, which continues to be seriously threatened by the recent progress of circuit miniaturization. Plasmon is the collective oscillation of free carriers in metal. Local surface plasmon resonance, which is excited on metal nanostructures, is especially attracting interest due to its ability to strongly enhance electric fi elds and sensitively detect absorbed agents by optical response changes. This feature detects water absorption with high sensitivity. Even if the water-layer thickness is smaller than the light wavelength, the optical response of the metal nanostructure drastically changes. Since a nanostructure has meso-pore structure, a plasmonic response occurs at temperatures higher than the dew point. This feature is expected to be applied to dew-condensation prevention for surrounding electronics.
