| 摘要 |
The present invention aims to provide a two-dimensional photonic crystal having an optical resonator, which allows the control of the front/back emission ratio of light. To achieve this object, a refractive index member ( 13 ) made of a material having a refractive index different from that of air is mounted on a two-dimensional photonic crystal having a body ( 11 ) in which holes ( 12 ) are periodically arranged. In this construction, the body ( 11 ) and the refractive index member ( 13 ) cooperatively function as an optical resonator located at the position where the refractive index member ( 13 ) is mounted. The light emitted from this optical resonator is stronger on the side having a higher refractive index, i.e. on the side where the refractive index member is mounted. Accordingly, the light ( 191 ) emitted from the side where the refractive index member ( 13 ) is mounted is stronger than the light ( 192 ) emitted from the other side. The ratio of the emission intensity of the two rays of light ( 191 ) and ( 192 ), i.e. the front/back emission ratio, can be controlled by changing the material, shape and/or size of the refractive index member.
|
