论文标题
贝尔曼嵌入特征状态的窄带吸收和热发射
Berreman Embedded Eigenstates for Narrowband Absorption and Thermal Emission
论文作者
论文摘要
嵌入的特征状态是具有与辐射兼容的动量的开放结构的非放射模式，但其特征是Q因子较大。传统上，这些状态源于从两个或多个非正交结构中的两个或多个非正交模式的辐射的总破坏性干扰。在这项工作中，我们基于Epsilon-Near-Zero（ENZ）分层材料中的贝尔曼模式演示了一类新型的嵌入式本征状状态，并提出了基于这些原则的高Q（〜10^3）的逼真的碳化硅（SIC）结构。所提出的结构表现出在狭窄的光谱和角度范围内的强吸收，从而引起准固定和高度指导的热发射。
Embedded eigenstates are nonradiative modes of an open structure with momentum compatible with radiation, yet characterized by unboundedly large Q-factors. Traditionally, these states originate from total destructive interference of radiation from two or more non-orthogonal modes in periodic structures. In this work, we demonstrate a novel class of embedded eigenstates based on Berreman modes in epsilon-near-zero (ENZ) layered materials and propose realistic silicon carbide (SiC) structures supporting high-Q (~10^3) resonances based on these principles. The proposed structures demonstrate strong absorption in a narrow spectral and angular range, giving rise to quasi-coherent and highly directive thermal emission.
