Extremely low optical transmittance in the stopbands of photonic crystals

Yasuo Ohtera, Takayuki Kawashima

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)


We demonstrate extremely low transmittance characteristics of photonic crystals (PhCs) with a finite thickness in specific photonic bandgaps (PBGs) through numerical simulation, and clarify its origin. Some of the PhCs support decaying Bloch eigenmodes, whose propagation constant (real part of the Bloch wavenumber) as well as their decay constant (imaginary part) changes with frequency inside the bandgap. Such a class of modes can interfere destructively at the exit end of the crystal depending on their round-trip phase change, which creates comb-like valleys in their transmission spectra.

Original languageEnglish
Pages (from-to)85-91
Number of pages7
JournalPhotonics and Nanostructures - Fundamentals and Applications
Issue number2
Publication statusPublished - 2009 May


  • Complex photonic band diagram
  • Evanescent modes
  • Photonic bandgap
  • Photonic crystal
  • Wavelength filter

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics
  • Hardware and Architecture
  • Electrical and Electronic Engineering


Dive into the research topics of 'Extremely low optical transmittance in the stopbands of photonic crystals'. Together they form a unique fingerprint.

Cite this