Extremely low optical transmittance in the stopbands of photonic crystals

Yasuo Ohtera; Takayuki Kawashima

doi:10.1016/j.photonics.2008.12.003

Extremely low optical transmittance in the stopbands of photonic crystals

Yasuo Ohtera, Takayuki Kawashima

ENG - Communications Engineering

Research output: Contribution to journal › Article › peer-review

5 Citations (Scopus)

Abstract

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 language	English
Pages (from-to)	85-91
Number of pages	7
Journal	Photonics and Nanostructures - Fundamentals and Applications
Volume	7
Issue number	2
DOIs	https://doi.org/10.1016/j.photonics.2008.12.003
Publication status	Published - 2009 May

Keywords

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

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10.1016/j.photonics.2008.12.003

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title = "Extremely low optical transmittance in the stopbands of photonic crystals",

abstract = "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.",

keywords = "Complex photonic band diagram, Evanescent modes, Photonic bandgap, Photonic crystal, Wavelength filter",

author = "Yasuo Ohtera and Takayuki Kawashima",

note = "Funding Information: This study has been supported by SENTAN, JST.",

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doi = "10.1016/j.photonics.2008.12.003",

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T1 - Extremely low optical transmittance in the stopbands of photonic crystals

AU - Ohtera, Yasuo

AU - Kawashima, Takayuki

N1 - Funding Information: This study has been supported by SENTAN, JST.

PY - 2009/5

Y1 - 2009/5

N2 - 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.

AB - 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.

KW - Complex photonic band diagram

KW - Evanescent modes

KW - Photonic bandgap

KW - Photonic crystal

KW - Wavelength filter

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JO - Photonics and Nanostructures - Fundamentals and Applications

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SN - 1569-4410

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ER -

Extremely low optical transmittance in the stopbands of photonic crystals

Abstract

Keywords

ASJC Scopus subject areas

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