| Autor: |
Yoshifumi Ogawa, Yasuhisa Omura, Yukio Iida |
| Rok vydání: |
2005 |
| Předmět: |
|
| Zdroj: |
Journal of Lightwave Technology. 23:4374-4381 |
| ISSN: |
0733-8724 |
| Popis: |
This paper investigates the optical characteristics of a light-focusing device (LFD) consisting of two-dimensional (2-D) photonic crystals (PCs) configured in a parallelogram lattice structure. The LFD is composed of two jointed symmetric PCs that have a strong self-collimation effect. This self-collimation effect focuses the incident light wave. For a square lattice, however, in which the equi-frequency contours have fourfold symmetry (/spl pi//2 rotation symmetry), the band structure needed to realize an LFD was not obtained. The proposed solution was to consider the parallelogram lattice arrangement since its equi-frequency contours do not have /spl pi//2 rotation symmetry; a prototype LFD composed of 2-D PCs with parallelogram lattice structure exhibits desirable focusing performance. The authors also investigate the asymmetry of light wave transmission through the LFD. Finite-division time-domain (FDTD) simulations of the optical property of the LFD show that the LFD has distinct transmission asymmetry. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
|
