29 October 2001 Effect of absorption on photonic band gap
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Proceedings Volume 4595, Photonic Systems and Applications; (2001); doi: 10.1117/12.446607
Event: International Symposium on Photonics and Applications, 2001, Singapore, Singapore
Abstract
In order to investigate numerically the effect of absorption on the photonic band gap, we consider a one-dimensional (1D) composite photonic crystal composed of alternating layers having complex dielectric constants. We perform calculations on the reflective spectra using the transfer matrix technique for the composite photonic crystal and find that the reflectance depends on material loss tangent Im((epsilon) )/Re((epsilon) ) and the scaled frequency (omega) /(omega) 0. It is shown that the absorption in composite photonic crystal breaks the periodic band structure produced by Bragg reflection in perfect photonic crystal. It pushes stop band-edges down, and raises the bottom of the pass band. The absorption makes the discrete stop bands become gradually a continuous stop band in larger-frequency range as material loss tangent Im((epsilon) )/Re((epsilon) ) increases.
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San Luo, Kailun Yao, J.Y. Xu, Zuli Liu, Ch. F. Li, L. Zhao, "Effect of absorption on photonic band gap", Proc. SPIE 4595, Photonic Systems and Applications, (29 October 2001); doi: 10.1117/12.446607; https://doi.org/10.1117/12.446607
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KEYWORDS
Photonic crystals

Absorption

Reflectivity

Composites

Dielectrics

Holmium

Crystals

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