Experiment of Doppler shift of diffraction beam

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• 作者：Chunxia Li ; Jianghua Xu ; Jiabi Chen ; Songlin Zhuang
• 关键词：Doppler shift ; Plane grating ; Diffraction beam ; Beat frequency
• 刊名：Optik - International Journal for Light and Electron Optics
• 出版年：2013
• 出版时间：October, 2013
• 年：2013
• 卷：124
• 期：20
• 页码：4341-4344
• 全文大小：332 K

文摘

Optical heterodyne interfering is used to measure the Doppler shift of diffraction beam of moving plane grating. By introducing Doppler shift in reference beam and contrasting the final beat frequency, the Doppler shift is measured to be normal when incident light and diffraction light are in the same side of the normal of periodic plane grating, which shows that abnormal Doppler shift can not occur on the material with ¡°negative refraction phenomenon¡± caused by periodicity. Periodic two-dimensional photonic crystal with the property of abnormal Doppler shift has equivalent negative refractive index, and the abnormal properties of left-handed materials are not only caused by periodicity.