Exotic radiation from a photonic crystal excited by an ultrarelativistic electron beam.
Exotic radiation from a photonic crystal excited by an ultrarelativistic electron beam.
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DOI：
10.1103/physreve.74.056601
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发表时间：
2006-04
期刊：
影响因子：
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通讯作者：
N. Horiuchi;T. Ochiai;Jun-ichi Inoue;Y. Segawa;Y. Shibata;K. Ishi;Yasuhiro Kondo;M. Kanbe;Hiroshi Miyazaki;F. Hinode;S. Yamaguti;Kazuo Ohtaka
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文献类型：
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作者：
N. Horiuchi;T. Ochiai;Jun-ichi Inoue;Y. Segawa;Y. Shibata;K. Ishi;Yasuhiro Kondo;M. Kanbe;Hiroshi Miyazaki;F. Hinode;S. Yamaguti;Kazuo Ohtaka
我们报道了从一维光子晶体中观察到的奇异辐射(非传统的Smith-Purcell辐射)。奇异辐射的物理来源是超相对论电子束对光子带的直接激发。奇异辐射的光谱遵循一定宇称的光子带，这与传统的史密斯-珀塞尔辐射形成鲜明对比，传统的史密斯-珀塞尔辐射只显示线性色散。观察的关键因素是电子束处于极端相对论区域，而且光子晶体是有限的。通过实验结果与理论结果的比较，确定了辐射的来源。
We report the observation of an exotic radiation (unconventional Smith-Purcell radiation) from a one-dimensional photonic crystal. The physical origin of the exotic radiation is direct excitation of the photonic bands by an ultrarelativistic electron beam. The spectrum of the exotic radiation follows photonic bands of a certain parity, in striking contrast to the conventional Smith-Purcell radiation, which shows solely a linear dispersion. Key ingredients for the observation are the facts that the electron beam is in an ultrarelativistic region and that the photonic crystal is finite. The origin of the radiation was identified by comparison of experimental and theoretical results.