论文标题
Epsilon-near-Zero等离子波导，以增强非线性相干光结合相互作用
Epsilon-near-zero plasmonic waveguides to enhance nonlinear coherent light-matter interactions
论文作者
论文摘要
我们展示了一种通过使用Epsilon-near-Zero（ENZ）等离子波导来控制纳米级的光并实现相干完美吸收（CPA）的方法。提出的波导在其截止频率下支持有效的ENZ响应，并结合沿纳米通道的强场和均匀的场增强。 CPA条件在ENZ频率上完全满足，令人惊讶的是，亚波长等离子体结构，在两个具有适当振幅和相的反向传播平面波照明下导致强大的CPA。此外，随着我们增加入射波的输入强度，我们研究了所提出的ENZ等离子构构的非线性响应。我们证明，在这种情况下，CPA现象可以变得强度和相位依赖性，从而导致新的可调全光开关和吸收设备。
We demonstrate a way to coherently control light at the nanoscale and achieve coherent perfect absorption (CPA) by using epsilon-near-zero (ENZ) plasmonic waveguides. The presented waveguides support an effective ENZ response at their cut-off frequency, combined with strong and homogeneous field enhancement along their nanochannels. The CPA conditions are perfectly satisfied at the ENZ frequency, surprisingly by a subwavelength plasmonic structure, resulting in strong CPA under the illumination of two counter-propagating plane waves with appropriate amplitudes and phases. In addition , we investigate the nonlinear response of the proposed ENZ plasmonic configuration as we increase the input intensity of the incident waves. We demonstrate that the CPA phenomenon can become both intensity- and phase-dependent in this case leading to new tunable all-optical switching and absorption devices.
