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Updated: Aug 18, 2026

Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities
Published on: November 30, 2012
Diffuse-diffuse photon coupling via nonscattering void in the presence of refractive index mismatch on the void
Jae Hoon Lee1, Seunghwan Kim, Youn Tae Kim
1Basic Research Laboratory, Electronics and Telecommunications Research Institute, 161 Gajeong-dong, Yuseong-gu, Daejeon 305-350, Korea.
Abstract:
It is well established that the diffusion approximation (DA) is valid for light propagation in highly scattering media, but it breaks down in nonscattering void regions. The methods that handle the void with refractive index matched boundary were previously developed. For the void with refractive index mismatched boundary, no theory is yet available. We derived the finite element method that can handle the void problem with refractive index mismatch on its boundary. The method uses the ray tracing to account for the multiple reflections of rays within the void due to refractive index mismatch on the void boundary. We applied the method to the four-layer adult head model and the good agreements with Monte Carlo simulation results were found in the mean time of flight data.
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