Perfect absorption and giant magnification with a thin metamaterial layer

Abstract

It is shown that perfect absorption and giant amplification can be realized when a wave impinges on a special metamaterial layer with zero real parts of the permittivity and permeability. The imaginary parts of the permittivity and permeability remain nonzero, corresponding to finite loss or gain. Perfect absorption and giant magnification can still be achieved even if the thickness of the metamaterial layer is arbitrarily thin and the absolute imaginary parts of the permittivity and permeability are very small. The metamaterial layer needs a total-reflection substrate for perfect absorption, while this is not required for giant magnification.

15 pages, 4 figures

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• A unified theory for perfect absorption in ultra-thin absorptive films with constant tangential electric or magnetic fields
• Near-perfect absorption in epsilon-near-zero structures with hyperbolic dispersion
• Measurement of Near-field Thermal Radiation between Multilayered Metamaterials
• Tailoring Infrared Absorption and Thermal Emission with Ultrathin-film Interferences in Epsilon-Near-Zero Media
• Dispersion engineering of infrared epsilon-near-zero modes by strong coupling to optical cavities
• Resonant absorption and amplification of circularly-polarized waves in inhomogeneous chiral media
• Resonant absorption of electromagnetic waves in transition anisotropic media
• Ultrathin Semiconductor Perfect Light Absorbers with High Spectral, Polarization, and Angle Selectivity for Arbitrary Wavelengths