论文标题
谐振材料中连贯的完美吸收
Coherent perfect absorption in resonant materials
论文作者
论文摘要
连贯的完美吸收（CPA）是一种干涉效应，可确保在有损层中完全吸收其内在损失。迄今为止，仅在单个波长或狭窄的带宽下观察到它，因此可以忽略波长依赖性吸收。在这里，我们在带宽〜60 nm的带宽中，在具有低掺杂浓度的有机激光染料浓度的2-UM厚聚合物膜中。平面腔设计具有光谱“浸入”以适应染料谐振线宽，因此即使在其吸收边缘也可以实现CPA。这种方法允许在激光染料和共振材料中实现强大的吸收 - 与固有的吸收水平无关，其在光谱谱和由于高掺杂水平而不会遭受吸收猝灭。
Coherent perfect absorption (CPA) is an interferometric effect that guarantees full absorption in a lossy layer independently of its intrinsic losses. To date, it has been observed only at a single wavelength or narrow bandwidths, whereupon wavelength-dependent absorption can be ignored. Here we produce CPA over a bandwidth of ~ 60 nm in a 2-um-thick polymer film with a low-doping concentration of an organic laser dye. A planar cavity is designed with a spectral `dip' to accommodate the dye resonant linewidth, and CPA is thus achieved even at its absorption edges. This approach allows realizing strong absorption in laser dyes - and resonant materials in general - independently of the intrinsic absorption levels, with a at spectral profile and without suffering absorption quenching due to high doping levels.
