To provide a light source device which can suppress a chance that an exciton in an excited phosphor returns to a ground state in a process of non-radiation (an exciton changes into a phonon) and an occurrence of excitation saturation, and thus make it possible to improve luminous efficiency and light emission intensity.
A light source device has a phosphor layer 3 that light with a predetermined wavelength, emitted from a solid light source element 2, enters as an exciting light. The phosphor layer 3 excited by the exciting light entered causes fluorescent light to be generated and emits the fluorescent light outside. The light source device also has a metal layer 4 which is bonded on a predetermined outer surface of the phosphor layer 3 except an incidence surface the exciting light comes in and an output surface the fluorescent light goes out, and converts an exciton excited in the phosphor layer 3 into light through a surface plasmon polariton in a proximity of the predetermined surface. The light converted from the exciton through the surface plasmon polariton is emitted from the output surface of the phosphor layer 3 together with the fluorescent light.
MATSUMOTO TAKAHIRO
YASUDA YOSHIAKI
OKAMOTO KOICHI
OKAMOTO KOICHI
| JP2004128393A | 2004-04-22 | |||
| JP2009043903A | 2009-02-26 | |||
| JP2009038260A | 2009-02-19 | |||
| JP2004128393A | 2004-04-22 | |||
| JP2009043903A | 2009-02-26 | |||
| JP2009038260A | 2009-02-19 | |||
| JP2006176859A | 2006-07-06 | |||
| JP2001040348A | 2001-02-13 | |||
| JP2004083712A | 2004-03-18 | |||
| JP2010080741A | 2010-04-08 |