Patent ID: 8564186
Filing Date: 2013-10-22
Classification: B82Y,H01L

Abstract:
1. A light source apparatus comprising: a solid light source element which emits a light beam of a predefined wavelength, a phosphor layer which is subjected to the light beam emitted from the solid light source element as an excitation light beam and is excited by the incident excitation light beam to generate a fluorescence beam of a longer wavelength than the excitation light beam and emit the fluorescence beam to the outside, and a metal layer joined to a predefined surface among outer surfaces of the phosphor layer for converting excitons excited in the phosphor layer close to the predefined surface into a light beam via surface plasmon polaritons, the outer surfaces of the phosphor layer including an incident surface of the excitation light beam, an outgoing surface of the fluorescence beam, and the predefined surface which is different than the incident surface and the outgoing surface, wherein the light beam converted from the excitons via the surface plasmon polaritons is emitted out of the outgoing surface of the phosphor layer together with the fluorescence beam.