A unified theory for perfect absorption in ultra-thin absorptive films with constant tangential electric or magnetic fields
arXiv:1405.6475 · doi:10.1103/PhysRevB.90.165128
Abstract
The maximal absorption rate of ultra-thin films is 50% under the condition that the tangential electric (or magnetic) field is almost constant across the film in symmetrical environment. However, with certain reflectors, the absorption rate can be greatly increased, to even perfect absorption (100%). In this work, we explicitly derive the general conditions of the ultra-thin absorptive film parameters to achieve perfect absorption with general types of reflectors under the condition that the tangential electric (or magnetic) field is almost constant across the film. We find that the parameters of the film can be classified into three groups, exhibiting: 1) a large permittivity (permeability), 2) a near-zero permeability (permittivity), or 3) a suitable combination of the permittivity and the permeability, respectively. Interestingly, the latter two cases demonstrate extraordinary absorption in ultra-thin films with almost vanishing losses. Our work serves as a guide for designing ultra-thin perfect absorbers with general types of reflectors.
References in corpus (15)
- A Perfect Metamaterial Absorber
- A metamaterial absorber for the terahertz regime: Design, fabrication and characterization
- Total light absorption in graphene
- An Infrared Spatial and Frequency Selective Metamaterial Perfect Absorber
- Coherent Perfect Absorbers: Time-reversed Lasers
- Interference theory of metamaterial perfect absorbers
- Analysis and Design of Ultra Thin Electromagnetic Absorbers Comprising Resistively Loaded High Impedance Surfaces
- Realization of an all-dielectric zero-index optical metamaterial
- Planar Metamaterials for Antireflection Coating
- A Thin Electromagnetic Absorber for Wide Incidence Angles and Both Polarizations
- Perfect Absorption in Ultrathin Epsilon-Near-Zero Metamaterials Induced by Fast-Wave Non-Radiative Modes
- Perfect coupling of light to surface plasmons by coherent absorption
- Directional perfect absorption using deep subwavelength low permittivity films
- Perfect absorption and giant magnification with a thin metamaterial layer
- Near-perfect absorption in epsilon-near-zero structures with hyperbolic dispersion
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- Approaching the absorption limit with monolayer semiconductor superlattices
- The optical performance of a dielectric-metal-dielectric anti-reflective absorber structure
- Ultra-broadband reflectionless Brewster absorber protected by reciprocity
- Microwave and Acoustic Absorption Metamaterials