One-dimensional chiral photonic bandgap structure analyzed by nonsymmetric transmission-line method

Zhong Yin Xiao; Zi Hua Wang

doi:10.1117/12.521634

12 May 2004 One-dimensional chiral photonic bandgap structure analyzed by nonsymmetric transmission-line method

Zhong Yin Xiao, Zi Hua Wang

Proceedings Volume 5280, Materials, Active Devices, and Optical Amplifiers; (2004) https://doi.org/10.1117/12.521634
Event: Asia-Pacific Optical and Wireless Communications, 2003, Wuhan, China

Abstract

In this paper, the formula of reflection coefficient of multi-layer chiral media is derived by non-symmetric transmission-line method. Then, it is applied to 1-D chiral photonic crystal structure, which is composed of thin chiral layers sandwiched by air. The results show that it is difficult to obtain photonic band gap for general dielectric when the difference of two media refractive indices isn't large, and the reflection coefficient is small. With the increasing of the refractive index of the medium, reflection coefficient becomes gradually large, and reflection bandwidth basically keeps unchanged. These characteristics are agreed with results of theoretical analysis of photonic crystal. However, for chiral photonic crystal, although the refractive index of chiral layer is small, the wave spectrum obtained contains forbidden zones and the reflection coefficient from such a structure is found to be almost equal to 1, i.e., the wave is almost totally reflected through adjusting chiral parameter. Therefore it is easier to obtain an ideal photonic band gap.

Citation Download Citation

Zhong Yin Xiao and Zi Hua Wang "One-dimensional chiral photonic bandgap structure analyzed by nonsymmetric transmission-line method", Proc. SPIE 5280, Materials, Active Devices, and Optical Amplifiers, (12 May 2004); https://doi.org/10.1117/12.521634

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