Stacked three diminesional photonic crystal, light emitting device, and image display apparatus

Abstract

Provided is a light emitting structure which can emit light having a plurality of wavelength distributions from a single light emitting structure, can be integrated at high density, and can control a radiation mode pattern of radiation light and polarization thereof. A stacked three-dimensional photonic crystal is composed of a plurality of three-dimensional photonic crystals having photonic band gaps different from one another, which are stacked. Each of the plurality of three-dimensional photonic crystals includes a resonator in which a point defect is formed.

1 .- 13 . (canceled) 
     
     
         14 . A stacked three-dimensional photonic crystal including an active medium, comprising:
 a first three-dimensional photonic crystal for emitting light of a first wavelength; and   a second three-dimensional photonic crystal which is located on a light emitting side with respect to the first three-dimensional photonic crystal, for emitting light of a second wavelength which is shorter than the first wavelength.   
     
     
         15 . A stacked three-dimensional photonic crystal according to  claim 14 , wherein the active medium emits light through current injunction. 
     
     
         16 . A stacked three-dimensional photonic crystal according to  claim 14 , wherein the active medium emits light through excitation light irradiation. 
     
     
         17 . A light emitting device comprising:
 the stacked three-dimensional photonic crystal according to  claim 14 ; and   excitation means for exciting the active medium.   
     
     
         18 . A light emitting device according to  claim 17 , further comprising switching means for controlling a light emitting state of the light emitting device. 
     
     
         19 . A light emitting device according to  claim 18 , wherein the switching means controls a drive signal supplied to the excitation means. 
     
     
         20 . A light emitting device according to  claim 18 , wherein the first three-dimensional photonic crystal and the second three-dimensional photonic crystal include corresponding resonators, and
 the switching means changes a resonant wavelength of each of the resonators to control the light emitting state of the light emitting device.   
     
     
         21 . A light emitting device according to  claim 18 , wherein the first three-dimensional photonic crystal and the second three-dimensional photonic crystal include corresponding resonators, and
 the switching means cuts off an optical path of light emitted from each of the resonators to control the light emitting state of the light emitting device.   
     
     
         22 . A light emitting device according to  claim 17 , wherein the light emitting device emits light in a wavelength region corresponding to at least one of colors of R, G, and B. 
     
     
         23 . An image display apparatus, comprising a plurality of arranged light emitting devices, each of which is the light emitting device according to  claim 17 .