Design of a terahertz photonic crystal transmission filter containing ferroelectric material

Tzu Chyang King, Jian Jie Chen, Kai Chun Chang, Chien Jang Wu

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3 Citations (Scopus)


The ferroelectric material KTaO3 (KTO) has a very high refractive index, which is advantageous to the photonic crystal (PC) design. KTO polycrystalline crystal has a high extinction coefficient. In this work, we perform a theoretical study of the transmission properties of a PC bandpass filter made of polycrystalline KTO at terahertz (THz) frequencies. Our results show that the defect modes of usual PC narrowband filters no longer exist because of the existence of the high loss. We provide a new PC structure for the high-extinction materials and show that it has defect modes in its transmittance spectra, providing a possible bandpass filter design in the THz region.

Original languageEnglish
Pages (from-to)8276-8279
Number of pages4
JournalApplied Optics
Issue number29
Publication statusPublished - 2016 Oct 10


ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Engineering (miscellaneous)
  • Electrical and Electronic Engineering

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