| 非线性光子晶体缺陷对单向透射特性研究 |
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| 引用本文： | 赵年顺,蔡旭红.非线性光子晶体缺陷对单向透射特性研究[J].汕头大学学报(自然科学版),2010,25(4):44-49. |
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| 作者姓名： | 赵年顺 蔡旭红 |
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| 作者单位： | [1]黄山学院信息工程学院,安徽黄山245021 [2]汕头大学物理系,广东汕头515063 |
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| 摘 要： | 采用基于时域有限差分技术的数值模拟计算和时间耦合模理论,研究了引入Kerr非线性的光子晶体缺陷对的非对称透射特性,侧重于找到提高缺陷对的最大透射率及透射对比度的方法.结果表明,这种由2个不同尺寸但具有相同谐振频率的缺陷对组成的结构具有单向透射特性,理论分析也验证了数值模拟结果,并且适当错开两缺陷共振频率的位置,可以使缺陷对结构的最大透射率及透射对比度都有很大的提高.
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| 关 键 词： | 光子晶体 缺陷对 时域有限差分法 时间耦合模理论 价值因数 |
Investigation of Unidirectional Transmission Behavior Based on Photonic Crystal Defect Pairs with Kerr Nonlinearity |
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| ZHAO Nian-shun,CAI Xu-hong.Investigation of Unidirectional Transmission Behavior Based on Photonic Crystal Defect Pairs with Kerr Nonlinearity[J].Journal of Shantou University(Natural Science Edition),2010,25(4):44-49. |
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| Authors: | ZHAO Nian-shun CAI Xu-hong |
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| Institution: | ZHAO Nian-shun, CAl Xu-hong(1.Department of Computer Science ＆ Engineering, Huangshan University, Huangshan 245041, Anhui, China; 2. Department nf Physics, Shantou University, Shantou 515063, Guangdung, China) |
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| Abstract: | The unidirectional transmission behavior of photonic crystal （PC） consisting of defect pairs with Kerr nonlinearity is investigated. Numerical simulations based on the finite-difference time-domain technique and the coupled mode theory （CMT）are employed to evaluate the designed optical diodes. The investigation focused on how to enhance the transmission contrast and the maximum transmission of defect pairs. It is found that the constitutional defects possess different radius but similar resonant exhibit to some extent unidirectional transmission. The simulation results are supported by the theoretical analysis. In addition, by properly misaligning the resonant frequencies of the constitutional PC defects, the transmission contrast as well as the maximum transmission can be signif icantly improved. |
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| Keywords: | photonic crystal defect pair FDTD CMT figure of merit |
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