Gain enhanced Fano resonance in a coupled photonic crystal cavity-waveguide structure.

Gain enhanced Fano resonance in a coupled photonic crystal cavity-waveguide structure.
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在耦合光子晶体腔-波导结构中获得增强的法诺共振

DOI:
10.1038/srep33645
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发表时间:
2016-09-19
期刊:
影响因子:
4.6
通讯作者:
Xu X
Xu X
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Zhao Y;Qian C;Qiu K;Tang J;Sun Y;Jin K;Xu X

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具有耦合腔和波导的系统已经被证明是光学开关和光学传感器。为了优化这些光学器件的功能,使用了具有不对称和陡峭谱线形状的Fano共振。我们提出一种耦合光子晶体腔-波导结构,通过在波导中放置部分反射元件来实现Fano谐振。为了增强Fano共振,在腔中引入了光学增益材料。随着增益的增加,传输线的形状变得陡峭,并且透射率可以增强六倍,从而通过小的频移提供大的对比度。展望了增益增强Fano共振在光开关和光传感器中的应用前景。
Systems with coupled cavities and waveguides have been demonstrated as optical switches and optical sensors. To optimize the functionalities of these optical devices, Fano resonance with asymmetric and steep spectral line shape has been used. We theoretically propose a coupled photonic crystal cavity-waveguide structure to achieve Fano resonance by placing partially reflecting elements in waveguide. To enhance Fano resonance, optical gain material is introduced into the cavity. As the gain increases, the transmission line shape becomes steepened and the transmissivity can be six times enhanced, giving a large contrast by a small frequency shift. It is prospected that the gain enhanced Fano resonance is very useful for optical switches and optical sensors.
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