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Updated: Jun 2, 2026

Using Microwave and Macroscopic Samples of Dielectric Solids to Study the Photonic Properties of Disordered Photonic Bandgap Materials
Published on: September 26, 2014
Simple expressions for the maximum omnidirectional bandgap of bilayer photonic crystals
1Department of Engineering Science, National Taiwan University, 1, Sec. 4, Roosevelt Road, Taipei, 10617, Taiwan. hsuehwj@ntu.edu.tw
Abstract:
We propose three dimensionless approximate expressions to predict the thickness filling factor, gap center, and gap width of the maximum omnidirectional gap (MODG) for various refractive indices in one-dimensional photonic crystals. These expressions are simple and do not include trigonometric or inverse trigonometric functions. It is easy to obtain the MODG from given refractive indices but also to estimate the refractive indices from the MODG based on the results.

