Perfect coupling of light to surface plasmons by coherent absorption
Perfect coupling of light to surface plasmons by coherent absorption
复制标题
DOI：
10.1103/physrevlett.108.186805
复制
发表时间：
2012-05-03
影响因子：
8.6
通讯作者：
Cao, Hui
中科院分区：
文献类型：
--
作者：
Noh, Heeso;Chong, Yidong;Cao, Hui
我们从理论上表明，相干光可以被完全吸收，并转移到表面等离子体在一个二维或三维的金属纳米结构，通过激发它与相应的表面等离子体激元激光器（“spaser”）的时间反转模式。窄带完全吸收是临界耦合概念在具有表面等离子体共振的纳米腔中的推广和应用。光与纳米结构的完美耦合在纳米探测、无背景光谱学和超灵敏检测或传感方面具有潜在的应用。
We show theoretically that coherent light can be completely absorbed and transferred to surface plasmons in a two-or three-dimensional metallic nanostructure by exciting it with the time-reversed mode of the corresponding surface plasmon laser ("spaser''). The narrow-band perfect absorption is a generalization and application of the concept of critical coupling to a nanocavity with surface plasmon resonances. Perfect coupling of light to nanostructures has potential applications to nanoscale probing as well as background-free spectroscopy and ultrasensitive detection or sensing.