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4 September 2018 Two abnormal physical effects in negative index photonic crystals
Qiang Jiang, Jiabi Chen, Liangcai Cao, Guofan Jin
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Proceedings Volume 10755, Photonic Fiber and Crystal Devices: Advances in Materials and Innovations in Device Applications XII; 107550L (2018) https://doi.org/10.1117/12.2320064
Event: SPIE Optical Engineering + Applications, 2018, San Diego, California, United States
Abstract
The photonic crystals possess complex dispersion relation and the unusual dispersion leads to negative refraction. Based on negative refraction, three main physical phenomena, negative Goos–Hänchen displacement, inverse Doppler effect and abnormal Cherenkov radiation have been proposed. In this work, two abnormal physical phenomena are discussed. Firstly, the negative Goos–Hänchen shift displacement is simulated by using common FDTD method. The negative displacement is measured experimentally at the wavelength of 10.6 μm. Secondly, a novel phenomenon, the dual Doppler effect, in the simultaneous occurrence of both normal and inverse Doppler effect in one moving two-dimensional wedge-type photonic crystal with negative index is investigated by using spatial Fourier Transformation. This phenomenon is also simulated by an improved FDTD method. The results have potential applications in precision measurement, cloaking, sensor, radar deception and so on.
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Qiang Jiang, Jiabi Chen, Liangcai Cao, and Guofan Jin "Two abnormal physical effects in negative index photonic crystals", Proc. SPIE 10755, Photonic Fiber and Crystal Devices: Advances in Materials and Innovations in Device Applications XII, 107550L (4 September 2018); https://doi.org/10.1117/12.2320064
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KEYWORDS
Doppler effect
Photonic crystals
Negative refraction
Finite-difference time-domain method
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