Semouchkina Elena, Duan Ran, Semouchkin George, Pandey Ravindra
Department of Electrical and Computer Engineering, Michigan Technological University, 1400 Townsend Drive, Houghton, MI 49931, USA.
Department of Physics, Michigan Technological University, 1400 Townsend Drive, Houghton, MI 49931, USA.
Sensors (Basel). 2015 Apr 21;15(4):9344-59. doi: 10.3390/s150409344.
A new sensing approach utilizing Mie resonances in metamaterial arrays composed of dielectric resonators is proposed. These arrays were found to exhibit specific, extremely high-Q factor (up to 15,000) resonances at frequencies corresponding to the lower edge of the array second transmission band. The observed resonances possessed with features typical for Fano resonances (FRs), which were initially revealed in atomic processes and recently detected in macro-structures, where they resulted from interference between local resonances and a continuum of background waves. Our studies demonstrate that frequencies and strength of Fano-type resonances in all-dielectric arrays are defined by interaction between local Mie resonances and Fabry-Perot oscillations of Bloch eigenmodes that makes possible controlling the resonance responses by changing array arrangements. The opportunity for obtaining high-Q responses in compact arrays is investigated and promising designs for sensing the dielectric properties of analytes in the ambient are proposed.
提出了一种利用由介质谐振器组成的超材料阵列中的米氏共振的新型传感方法。发现这些阵列在对应于阵列第二传输带下限的频率处表现出特定的、极高品质因数（高达15000）的共振。观察到的共振具有典型的法诺共振（FRs）特征，法诺共振最初在原子过程中被发现，最近在宏观结构中被检测到，在宏观结构中它们是由局部共振与背景波连续体之间的干涉产生的。我们的研究表明，全介质阵列中法诺型共振的频率和强度由局部米氏共振与布洛赫本征模的法布里 - 珀罗振荡之间的相互作用定义，这使得通过改变阵列排列来控制共振响应成为可能。研究了在紧凑阵列中获得高品质因数响应的机会，并提出了用于传感环境中分析物介电特性的有前景的设计。
