Department of Photonics Engineering, Technical University of Denmark, Lyngby, Denmark.
Opt Lett. 2013 Jul 15;38(14):2466-8. doi: 10.1364/OL.38.002466.
We present a simple and robust structure for realizing asymmetric Fano transmission characteristics in photonic crystal waveguide-cavity structures. The use of Fano resonances for optical switching is analyzed using temporal coupled mode theory in combination with three-dimensional finite difference time domain simulations taking into account the signal bandwidth. The results suggest a significant energy reduction by employing Fano resonances compared to more well established Lorentzian resonance structures. A specific example of a Kerr nonlinearity shows an order of magnitude energy reduction.
我们提出了一种简单而强大的结构，用于在光子晶体波导-腔结构中实现非对称的 Fano 传输特性。使用时域耦合模理论结合三维有限差分时间域模拟，考虑到信号带宽，分析了 Fano 共振在光开关中的应用。结果表明，与更为成熟的洛伦兹共振结构相比，采用 Fano 共振可以显著降低能量。 Kerr 非线性的一个具体示例表明，能量降低了一个数量级。
