Berreman Embedded Eigenstates for Narrowband Absorption and Thermal Emission

Abstract

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.

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Cited by in corpus (10)

• Nonreciprocal thermal radiation in ultrathin magnetized epsilon-near-zero semiconductors
• Quasi-bound states in the continuum induced by $\mathcal{P}\mathcal{T}$-symmetry breaking
• Use of Transmission and Reflection Complex Time Delays to Reveal Scattering Matrix Poles and Zeros: Example of the Ring Graph
• Tailoring Infrared Absorption and Thermal Emission with Ultrathin-film Interferences in Epsilon-Near-Zero Media
• Layer-Resolved Resonance Intensity of Evanescent Polariton Modes in Anisotropic Multilayers
• Enhanced beam shifts mediated by Bound States in Continuum
• Monopole Embedded Eigenstate in Nonlocal epsilon-Near Zero Nanostructures
• Experimental observation of Berreman modes in uniaxial anisotropic nanoporous alumina film on aluminium substrate
• CPA-lasing associated with the quasibound states in the continuum in asymmetric non-Hermitian structures
• Synthesizing quasi-bound states in the continuum in epsilon-near-zero layered materials