| 摘要 |
PROBLEM TO BE SOLVED: To intensify an electronic field by a surface plasmon polariton and then to improve efficiency of optical amplification and light emission. SOLUTION: A metal layer 10 and a dielectric layer 12 are laminated, a linear or two-dimensional diffraction grating is formed by arraying many fine projection portions 11 in fine cycles on the surface where the metal layer and dielectric layer come into contact with each other, and a surface plasmon is excited nearby the diffraction grating by incidence of exciting light to intensify the electric field by localization of the light. The diffraction grating has the fine cycles less than nearly the effective wavelength of the exciting light. Heights of the fine projection portions are preferably 1 to 50 nm. A square grating or triangular grating is usable as a two-dimensional grating array. COPYRIGHT: (C)2006,JPO&NCIPI |
