ANALYSIS OF TUNABLE MULTIPLE-FILTERING PROPERTY IN A PHOTONIC CRYSTAL CONTAINING STRONGLY EXTRINSIC SEMICONDUCTOR

作者：Hung H C; Wu C J^*; Yang T J; Chang S J

来源：Journal of Electromagnetic Waves and Applications, 2011, 25(14-15): 2089-2099.

In this work, we analyze the tunable multiple-filtering property at infrared frequency in a finite semiconductor-dielectric photonic crystal (SDPC), (AB)(P) A, where A is a strongly extrinsic semiconductor, n-type germanium (n-Ge). B is a dielectric material, and P is the number of periods. It is found that multiple filtering phenomenon can be obtained in the region where the permittivity of n-Ge is negative. The number of resonant peaks is found to be equal to P. With the permittivity of n-Ge being concentration-dependent, these resonant peaks can be shifted as a function of impurity concentration. The analysis indicates that such an SDPC can work as a tunable multichannel filter which is of technical use for the semiconductor applications in optical communications.

• 出版日期2011