论文标题
亚波长谐振器的有限阵列中的高Q局部状态
High-Q localized states in finite arrays of subwavelength resonators
论文作者
论文摘要
我们引入了一种新型的物理机制，可在有限长度的次波长光谐振器中实现巨大质量因子（$ q $ - 因素）。基础物理基于阵列中的带边缘模式与另一种站立模式之间的干扰，以及在空间局部状态下形成具有巨大降低辐射损失的空间局部状态。我们证明了这一概念的$ n $偶极子，同时取消多尔斯的订单，$ n $ ther订单，$ q $ factor的生长为$ q \ propto n^α$，其中$α\ gtrsim 6.88 $。基于这一发现，我们提出了一系列现实的MIE共鸣纳米颗粒（$ n \ Lessim 29 $），并通过调谐阵列参数来实现Purcell因子（最高$ \ sim $ 3400）的显着增强。
We introduce a novel physical mechanism for achieving giant quality factors ($Q$-factors) in finite-length periodic arrays of subwavelength optical resonators. The underlying physics is based on interference between the band-edge mode and another standing mode in the array, and the formation of spatially localized states with dramatically suppressed radiative losses. We demonstrate this concept for an array of $N$ dipoles with simultaneous cancellation of multipoles up to $N$-th order and the $Q$ factor growing as $Q \propto N^α$, where $α\gtrsim 6.88$. Based on this finding, we propose a realistic array of Mie-resonant nanoparticles ($N \lesssim 29$) with a dramatic enhancement of the Purcell factor (up to $\sim $3400) achieved by tuning of the array parameters.
