光学学报, 2012, 32 (2): 0213001, 网络出版: 2012-01-06   

基于光子晶体耦合波导的宽带慢光研究

Investigation on Wideband Slow Light Based on Photonic-Crystal Coupled Waveguides
作者单位
电子科技大学光电信息学院, 四川 成都 610054
摘要
提出了在完整三角晶格光子晶体中引入两线缺陷构成的耦合型波导结构。通过分析谱带形对不同结构参数的依赖关系,在最优化的光子晶体耦合波导中,找到了一种独特的、群速近似为零的谱带。通过对波导宽度的啁啾实现了不同频率光的色散补偿,最终得到了带宽为13.24 nm、平均群折射率为28的宽带理想慢光,并进一步采用二维时域有限差分(FDTD)算法进行了验证。数值分析结果表明,高斯脉冲在耦合波导中传输后的相对时域展宽低于10%。
Abstract
A photonic-crystal coupled waveguide is proposed by introducing two line-defects to perfect triangular lattice. By analyzing the dependence of band shape on various structure parameteral, unique band with approximate zero group velocity can be obtained in an optimized photonic-crystal coupled waveguide. Moreover, by chirping the widths of the photonic-crystal waveguides in the optimized structure, a perfect wideband slow light is obtained, it possesses the bandwidth of 13.24 nm and the average group index of 28, which is verified by means of two-dimensional finite-difference time-domain (FDTD) simulations, and our numerical analysis shows that Gaussian pulses passing through the coupled waveguide have a relative temporal spreading below 10%.
参考文献

[1] T. F. Krauss. Why do we need slow light[J]. Nature Photonics, 2008, 2(8): 448~450

[2] L. V. Hau, S. E. Harris, Z. Dutton et al.. Light speed reduction to 17 metres per second in an ultracold atomic gas[J]. Nature, 1999, 397(6720): 594~598

[3] M. Soljacic, S. G. Johnson, S. Fan et al.. Photonic crystals slow-light enhancement of nonlinear phase sensitivity[J]. J. Opt. Soc. Am. B, 2002, 19(9): 2052~2059

[4] T. F. Krauss. Slow light in photonic crystal waveguides[J]. J. Phys. D, 2007, 40(9): 2666~2670

[5] T. Baba. Slow light in photonic crystals[J]. Nat. Photonics, 2008, 2(8): 465~473

[6] J. Hou, H. M. Wu, D. S. Citrin. Wideband slow light in chirped slot photonic-crystal coupled waveguides[J]. Opt. Express, 2010, 18(10): 10567~10580

[7] 曲连杰, 杨跃德, 黄永箴. 光子晶体波导慢光特性研究[J]. 光学学报, 2011, 31(1): 01130021

    Qu Lianjie, Yang Yuede, Huang Yongzhen. Slow-light characteristics of photonic crystal waveguides[J]. Acta Optica Sinica, 2011, 31(1): 01130021

[8] 殷建玲, 黄旭光, 刘颂豪 等. 介质柱形状对准晶光子晶体带隙特性的影响[J]. 中国激光, 2010, 37(2): 567~571

    Yin Jianling, Huang Xuguang, Liu Songhao et al.. Effect of the structure shape on the 8-fold photonic quasicrystals[J]. Chinese J. Lasers, 2010, 37(2): 567~571

[9] 张栋, 赵建林, 吕淑媛. 低群速度色散和低损耗的二维光子晶体慢光波导[J]. 光学学报, 2011, 31(1): 01130011

    Zhang Dong, Zhao Jianlin, Lü Shuyuan. Slow light waveguide with low group-velocity dispersion and low loss in 2-D photonic crystal[J]. Acta Optica Sinica, 2011, 31(1): 01130011

[10] D. Mori, T. Baba. Wideband and low dispersion slow light by chirped photonic crystal coupled waveguide[J]. Opt. Express, 2005, 13(23): 9398~9408

[11] S. G. Johnson, J. D. Joannopoulos. Block-iterative frequency-domain methods for Maxwell′s equations in a planewave basis[J]. Opt. Express, 2001, 8(3): 173~190

[12] A. Farjadpour, D. Roundy, A. Rodriguez et al.. Improving accuracy by subpixel smoothing in the finite-difference time domain[J]. Opt. Lett., 2006, 31(20): 2972~2974

[13] D. S. Gao, Z. Zhou. Nonlinear equation method for band structure calculations of photonic crystal slabs[J]. Appl. Phys. Lett., 2006, 88(16): 163105

张伟, 王智勇, 王文超, 杨辉, 邱琪. 基于光子晶体耦合波导的宽带慢光研究[J]. 光学学报, 2012, 32(2): 0213001. Zhang Wei, Wang Zhiyong, Wang Wenchao, Yang Hui, Qiu Qi. Investigation on Wideband Slow Light Based on Photonic-Crystal Coupled Waveguides[J]. Acta Optica Sinica, 2012, 32(2): 0213001.

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