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首页> 外文期刊>Optics Letters >High-contrast and low-power all-optical switch using Fano resonance based on a silicon nanobeam cavity
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High-contrast and low-power all-optical switch using Fano resonance based on a silicon nanobeam cavity

机译：基于硅纳米孔腔的扇形谐振，高对比度和低功耗全光开关

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摘要

We experimentally demonstrate an ultra-compact all-optical switch involving Fano resonance based on a side-coupled Fabry-Perot (F-P) resonator and a silicon photonic crystal (PhC) nanobeam cavity, with an area of only 11 mu m(2). By optimizing the structure of the nanobeam cavity to increase its intrinsic quality factor (Q), we achieve a sharp asymmetric transmission spectrum, with an extinction ratio (ER) as high as 40 dB and a peak loss as low as 0.6 dB. As far as we know, this is the highest measured ER in PhC-based Fano resonance. These excellent properties enable us to realize an all-optical switch with shorter switching recovery time, lower power consumption, and higher contrast, compared to that involving Lorentzian resonance. For example, under signal trains of 2.5 Gb/s, switching energy with a contrast of 3 dB for the Fano case is 113 fJ, which is 8 dB smaller than that for the Lorentzian case. Furthermore, by performing blue-detuned filtering on the 15-Gb/s output signal light, the switching contrast of the all-optical switch based on Fano resonance is significantly improved from 0.67 dB to 9.53 dB. (c) 2018 Optical Society of America
机译：我们在实验上证实的超小型的全光开关涉及基于一个侧耦合法布里 - 珀罗（F-P）谐振器和硅光子晶体（PHC）纳米束腔的Fano共振，仅为11亩M（2）。通过优化纳米腔的结构以增加其内在质量因子（Q），我们实现了尖锐的不对称透射光谱，具有高达40dB的消光比（ER）和低至0.6dB的峰值损耗。据我们所知，这是基于PHC的FANO共振中的最高测量ER。与涉及Lorentzian共振相比，这些优异的性能使我们能够实现具有较短的开关恢复时间，较低的功耗和更高的对比度的所有光学开关。例如，在2.5 Gb / s的信号列表下，对于Fano壳体的3dB的切换能量为113 fj，比Lorentzian案例小8 dB。此外，通过对15-GB / S输出信号光进行蓝色失谐滤波，基于FANO谐振的全光开关的开关对比度从0.67 dB显着提高到9.53dB。 （c）2018年光学学会

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