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Improved fake mode free plane wave expansion method.

Bin Jiang1, Wenjun Zhou, Wei Chen

  • 1Nano-Optoelectronics Lab, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China.

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|August 3, 2011
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Summary
This summary is machine-generated.

We present a new method to eliminate fake modes in photonic crystal band structures, enabling accurate design of 2D air hole photonic crystal slabs and other 3D devices.

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Area of Science:

  • Photonics and optical engineering
  • Computational physics and materials science

Background:

  • The plane wave expansion method with three-dimensional supercell approximation often introduces spurious 'fake modes' in photonic crystal analysis.
  • Accurate band structure calculation is crucial for designing photonic devices.

Purpose of the Study:

  • To investigate the origin of fake modes in photonic crystal simulations.
  • To develop a method for removing fake modes and obtaining a genuine band structure.

Main Methods:

  • Analysis of energy distribution between fake and real modes.
  • Proposal and application of the plane wave expansion-three planar-slab waveguides method.

Main Results:

  • Successfully removed fake modes from the band structure of a two-dimensional air hole photonic crystal slab.
  • Obtained a fake mode-free photonic crystal band structure for the first time.

Conclusions:

  • The proposed method effectively eliminates fake modes in photonic crystal band structures.
  • This technique is valuable for the precise design of photonic devices, including 2D photonic crystal slabs and other 3D structures.