Deka Jyoti Prasad, Sarma Amarendra K
Appl Opt. 2018 Feb 10;57(5):1119-1126. doi: 10.1364/AO.57.001119.
We propose a parity-time symmetric dielectric-nano-film-dielectric multilayered structure that could facilitate highly amplified transmission of optical power in the infrared spectrum. We have theoretically studied our model using the transfer-matrix formalism. The reflection and the transmission coefficients of the S-matrix are evaluated. The theoretical results are validated by FDTD numerical simulation. We have shown how the thickness of the layers and the gain/loss coefficient of the active layers could generate spectral singularities in the S-matrix and how these singularities could be exploited to achieve amplified transmission of a single wavelength through the structure.
我们提出了一种奇偶时间对称的介质-纳米薄膜-介质多层结构，该结构可促进红外光谱中光功率的高度放大传输。我们使用转移矩阵形式理论研究了我们的模型。评估了S矩阵的反射系数和传输系数。理论结果通过FDTD数值模拟得到验证。我们展示了层的厚度和有源层的增益/损耗系数如何在S矩阵中产生光谱奇点，以及如何利用这些奇点实现单波长光通过该结构的放大传输。
