Slow light in photonic crystal with combinations of gradient dielectric constant

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• 作者：Na Zhu ; Lei Zhou ; Li Xu
• 关键词：Photonic crystal ; Slow light ; Group velocity ; Dielectric constant ; GVD
• 刊名：Optik - International Journal for Light and Electron Optics
• 出版年：2013
• 出版时间：September, 2013
• 年：2013
• 卷：124
• 期：18
• 页码：3480-3484
• 全文大小：834 K

文摘

A line defect waveguide formed by a new kind of two-dimensional photonic crystal with combinations of gradient varied dielectric was designed and the properties of slow light will been studied by using the Plane Wave expansion Method (PWM). The result shows that the group velocity is slower when the corresponding combination of gradient dielectric constants are with higher dielectric constant and lower interval. In our new structure of photonic crystal, the corresponding group velocity can reach as low as 0.06c (c: light velocity in vacuum), two orders magnitude lower than light velocity. Meanwhile, the?group velocity dispersion effect is relatively small.