Near-perfect absorption in epsilon-near-zero structures with hyperbolic dispersion

Abstract

We investigate the interaction of polarized electromagnetic waves with hyperbolic metamaterial structures, whereby the in-plane permittivity component ${\epsilon }_x$ is opposite in sign to the normal component ${\epsilon }_z$. We find that when the thickness of the metamaterial is smaller than the wavelength of the incident wave, hyperbolic metamaterials can absorb significantly higher amounts of electromagnetic energy compared to their conventional counterparts. We also demonstrate that for wavelengths leading to $\Re ({\epsilon }_z)\approx 0$, near-perfect absorption arises and persists over a range of frequencies and subwavelength structure thicknesses.

References in corpus (4)

• Novel hyperbolic metamaterials based on multilayer graphene structures
• Hyperbolic metamaterials: nonlocal response regularizes broadband super-singularity
• Perfect absorption and giant magnification with a thin metamaterial layer
• Resonant Transmission of Electromagnetic Fields through Subwavelength Zero-$\epsilon$ Slits

Cited by in corpus (2)

• A unified theory for perfect absorption in ultra-thin absorptive films with constant tangential electric or magnetic fields
• Controllable nonreciprocal optical response and handedness-switching in magnetized spin orbit coupled graphene