Analysis of tunable multiple-filtering property in a photonic crystal containing strongly extrinsic semiconductor

H. C. Hung, C. J. Wu, T. J. Yang, S. J. Chang

Research output: Contribution to journalArticle

10 Citations (Scopus)


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.

Original languageEnglish
Pages (from-to)2089-2099
Number of pages11
JournalJournal of Electromagnetic Waves and Applications
Issue number14-15
Publication statusPublished - 2011 Nov 7


ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Physics and Astronomy(all)
  • Electrical and Electronic Engineering

Cite this