JP2005284043A5 - - Google Patents

Claims (12)

A display element having a two-dimensional photonic crystal or a three-dimensional photonic crystal having a photonic band gap in a predetermined wavelength region, a light source, and a control means,
The photonic crystal has a waveguide made of a line defect, and a plurality of resonators made of point defects arranged close to the waveguide,
The light source guides light in the predetermined wavelength range to the waveguide,
Each of the resonators has a variable resonance wavelength according to a control signal from the control means,
The control means makes the resonance wavelength coincide with the wavelength of light guided from the light source, thereby emitting light in the waveguide to the outside of the photonic crystal;
By controlling the resonance wavelength to be different from the wavelength of the light guided from the light source, the second state in which the light in the waveguide is prevented from being emitted outside the photonic crystal,
The display element, wherein the plurality of resonators form a pixel. The resonator includes a nonlinear medium whose refractive index changes when an electric field or current is applied from the outside, and the control means controls the resonance wavelength of the resonator by changing the refractive index of the nonlinear medium. The display element according to claim 1. The light source guides light of a single wavelength to the waveguide, and the control means matches the resonance wavelength of the resonator with the wavelength of the light guided to the waveguide. Or the display element of 2. The light source guides light including a plurality of wavelengths to the waveguide, and the control means matches each resonance wavelength of the plurality of resonators with any one of the plurality of wavelengths. The display element according to claim 1, wherein the display element is a display element. The display element according to claim 1, wherein the plurality of resonators are disposed on both sides of the waveguide. 6. The display element according to claim 1, wherein a plurality of the waveguides are provided in parallel to each other, and a plurality of the light sources are provided corresponding to the plurality of waveguides. 7. The display element according to claim 1, wherein the control means sequentially gives a control signal for determining a light emission state to the plurality of resonators within a predetermined period. 8. The control means according to claim 7, wherein the control means gives a control signal for determining an intensity of light guided to the waveguide to the light source in synchronization with a control signal for the plurality of resonators. Display element. 9. A display element according to claim 1, wherein the light source is a photonic crystal laser having a resonator made of a photonic crystal. The display element according to claim 1, wherein a light shielding unit is provided on a display surface side of the display element other than the upper part of the resonator. An image observation system for observing an image displayed on the display element according to claim 1 through an eyepiece optical system. An image projection system, wherein an image displayed on the display element according to claim 1 is projected by a projection optical system.