Bezus Evgeni A, Bykov Dmitry A, Doskolovich Leonid L
Opt Lett. 2022 Sep 1;47(17):4403-4406. doi: 10.1364/OL.470962.
We propose and investigate integrated metal-dielectric-metal (MDM) resonators operating with semi-guided waves (guided modes of dielectric slab waveguides). The MDM resonators are constituted by two metal strips "buried" in the waveguide core layer and separated by a dielectric waveguide segment. We theoretically prove and numerically demonstrate that by a proper choice of the mode incidence geometry, the widths of the metal strips, and the distance between them, it is possible to achieve either total absorption of the incident wave or coherent perfect absorption (in the case of symmetric incidence of two modes on the structure). The proposed planar MDM resonators may find application as absorbers or filters in integrated optical circuits.
我们提出并研究了与半导波（介质平板波导的导模）一起工作的集成金属-介质-金属（MDM）谐振器。MDM谐振器由“埋入”在波导芯层中的两条金属带组成，并由一个介质波导段隔开。我们从理论上证明并通过数值演示表明，通过适当选择模式入射几何结构、金属带的宽度及其之间的距离，可以实现入射波的全吸收或相干完美吸收（在两种模式对称入射到该结构的情况下）。所提出的平面MDM谐振器可作为集成光学电路中的吸收器或滤波器。
