Plasmon mode manipulation based on multi-layer hyperbolic metamaterials

Abstract

Metamaterial with hyperbolic dispersion properties can effectively manipulate plasmonic resonances. Here, we designed a hyperbolic metamaterial (HMM) substrate with a near-zero dielectric constant in the near-infrared region to manipulate the plasmon resonance of the nano-antenna (NA). For NA arrays, tuning the equivalent permittivity of HMM substrate by modifying the thickness of Au/diamond, the wavelength range of plasmon resonance can be manipulated. When the size of the NA changes within a certain range, the spectral position of the plasmon resonance will be fixed in a narrow band close to the epsilon-near-zero (ENZ) wavelength and produce a phenomenon similar to “pinning effect.” In addition, since the volume plasmon polaritons (VPP) mode is excited, it will couple with the localized surface plasmon (LSP) mode to generate a spectrum splitting. Therefore, the plasmon resonance is significantly affected and can be precisely controlled by designing the HMM substrate.

Analog electromagnetic induced transparency of T-type Si-based metamaterial and its applications

“…In the early years, almost all efforts aimed at achieving EIT like phenomena focused on metal based plasmon resonance systems [20][21][22]. However, due to the presence of Ohmic damping, metal structures inevitably suffer from large Joule losses, which makes it difficult to achieve high transmittance and high Q factor EIT and seriously hinders their application [23][24][25]. Therefore, scientists are striving to find low loss alternatives to noble metal structures, and one promising approach is to explore Mie resonance of dielectric particles.…”

The anapole state excited by an oblique incidence

“…However, near-field enhancements around metallic nanoparticles are typically strong on the surface, but weak inside the particles [3,4]. Revolutionary breakthroughs in plasmonic metamaterials, such as surface-enhanced Raman scattering [5][6][7][8], perfect absorption [9][10][11], optical sensors [12][13][14][15], cloaks [16], pinning effects [17], nanolasers [18,19], optical bound states in the continuum [20,21] and topology [22] have opened up new opportunities in many fields. Nonetheless, the intrinsic losses and local heating associated with metallic structures limit their practical use in many scenarios.…”

Negative refraction in multilayered metal-dielectric metamaterials with ellipse-like isofrequence surfaces

“…Under the condition of long-wavelength approximation [23,24], MMDMs are usually described by the effective media approximation [25][26][27] as homogeneous uniaxial crystals [28], the optical axis of which is perpendicular to the multilayer. Pioneer papers have proved that the two effective permittivity components parallel (e  ) and perpendicular (e ^) to optical axis can have opposite signs in a favorable range of frequencies, and the relevant isofrequency surfaces (IFSs) are in hyperbolic regime [29,30], which can exhibit negative refraction [31,32]. However, it should also be noticed that the description of the IFSs of MMDMs through effective media approximation is incomplete.…”