High-quality-factor and small-mode-volume hexapole modes in photonic-crystal-slab nanocavities
High-quality-factor and small-mode-volume hexapole modes in photonic-crystal-slab nanocavities
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DOI：
10.1063/1.1629140
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发表时间：
2003-11-24
影响因子：
4
通讯作者：
Lee, YH
中科院分区：
文献类型：
--
作者：
Ryu, HY;Notomi, M;Lee, YH
利用时域有限差分方法，研究了光子晶体平板改进的三角形单缺陷腔结构的六极模作为高品质因子（Q）和小模体积（V）谐振模的一个很好的候选者.通过优化结构参数，获得了大于2 × 10 ~（6）的大Q值，同时材料中的有效V值很小，达到了理论Q/V的记录值。六极模的高Q值是由于与六边形对称回音壁相关的抵消机制，模式分布和模式离域机制。(C)2003年，美国物理学会。
Using finite-difference time-domain calculations, we investigate the hexapole mode of photonic-crystal-slab modified triangular single-defect cavity structures as a good candidate for a high-quality factor (Q) and small-mode volume (V) resonant mode. Structural parameters are optimized to obtain very large Q of even higher than 2x10(6) with small effective V of the order of cubic wavelength in material, the record value of theoretical Q/V. It is found, by the Fourier-space investigation of resonant modes, that such a high Q from the hexapole mode is achieved due both to the cancellation mechanism related to hexagonally symmetric whispering-gallery-mode distribution and to the mode delocalization mechanism. (C) 2003 American Institute of Physics.