Analysis of Unidirectional Absorption in a Defective Superconducting Photonic Crystal

作者：Chang Tsung Wen; Huang Chih Hsi; Hou Da Jun; Wu Chien Jang^*; Chen De Xin

来源：IEEE Photonics Journal, 2017, 9(4): 5900509.

DOI：10.1109/JPHOT.2017.2717832

• Photonic crystal
• unidirectional absorption
• superconductor

Terahertz unidirectional resonant absorption in a finite one-dimensional defective superconducting photonic crystal is theoretically investigated. We consider an asymmetric photonic crystal (AB)D-N(BA)(M), where A is a dielectric, B is a superconductor, D is the dielectric defect, and N, M are the stack numbers, respectively. At N not equal M, it is found that the resonant absorption for the structure exhibits the unidirectional property. The unidirectional resonant absorption points increase as the difference between N and M increases. We also investigate the unidirectional property as a function of angle of incidence. The results show that the unidirectional absorption is nearly independent of the polarization at a given angle of incidence. The proposed structure can be used to design a polarization-independent optical device which may be technically used in superconducting photonics.

• 出版日期2017-8
• 单位长春大学