Enhanced optical activity in hyperbolic metasurfaces

Kotov, Oleg V.; Lozovik, Yu. E.

doi:10.1103/physrevb.96.235403

Cited by 52 publications

(24 citation statements)

References 89 publications

(131 reference statements)

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“…It is known that the linear birefringent effect exists in anisotropic media, where the phase accumulation of light is polarization‐dependent . This effect in planar photonics can be realized in anisotropic metasurfaces through artificial manipulation of isotropic surfaces or the unstructured natural films of anisotropic 2D materials . The latter possesses elliptic or even hyperbolic plasmon regimes that can be treated as ideal platforms for ultrathin linearly birefringent retarders .…”

Section: Plasmons In Anisotropic 2d Materialsmentioning

confidence: 99%

“…This effect in planar photonics can be realized in anisotropic metasurfaces through artificial manipulation of isotropic surfaces or the unstructured natural films of anisotropic 2D materials . The latter possesses elliptic or even hyperbolic plasmon regimes that can be treated as ideal platforms for ultrathin linearly birefringent retarders . Because the linear birefringence and the polarization rotation of light are directly determined by the ratio of the scattered amplitudes, microribbon arrays fabricated from the homogeneous anisotropic 2D surface, where the scattered amplitude in the perpendicular direction of the ribbons can obtain significant enhancement by exiting the localized plasmons, were proposed in order to implement the plasmon‐enhanced linear birefringence .…”

Section: Plasmons In Anisotropic 2d Materialsmentioning

confidence: 99%

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The Optical Properties and Plasmonics of Anisotropic 2D Materials

Wang

Zhang

Huang

et al. 2019

Advanced Optical Materials

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In the fast growing 2D materials family, anisotropic 2D materials, with their intrinsic in‐plane anisotropy, exhibit a great potential in optoelectronics. One such typical material is black phosphorus (BP), with a layer‐dependent and highly tunable bandgap. Such intrinsic anisotropy adds a new degree of freedom to the excitation, detection, and control of light. Particularly, hyperbolic plasmons with hyperbolic q‐space dispersion are predicted to exist in BP films, where highly directional propagating polaritons with divergent densities of states are hosted. Combined with a tunable electronic structure, such natural hyperbolic surfaces may enable a series of exotic applications in nanophotonics. Herein, the anisotropic optical properties and plasmons (especially hyperbolic plasmons) of BP are discussed. In addition, other possible 2D material candidates (especially anisotropic layered semimetals) for hyperbolic plasmons are examined. This review may stimulate further research interest in anisotropic 2D materials and fully unleash their potential in flatland photonics.

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Section: Plasmons In Anisotropic 2d Materialsmentioning

confidence: 99%

Section: Plasmons In Anisotropic 2d Materialsmentioning

confidence: 99%

The Optical Properties and Plasmonics of Anisotropic 2D Materials

Wang

Zhang

Huang

et al. 2019

Advanced Optical Materials

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“…The interface between a chiral metasurface and hyperbolic metamaterials can enable both high sensitivity and specificity for low-molecular-weight nucleic acids and proteins [111][112][113][114][115]. Interestingly, an adapted out-of-plane chiral metasurface enables three key functionalities of the HMM sensor: (i) an efficient diffractive element to excite surface and bulk plasmon polaritons [76,109]; (ii) an increase in the total sensing surface enabled via out-of-plane binding, improving diffusion-limited detection of small analyte concentrations; and (iii) additional biorecognition assays via circular dichroism (CD) and chiral selectivity that can be optimally tailored to amplify the chiral-chiral interactions between the metamaterial inclusions and the molecules, enabling high-sensitivity handedness detection of enantiomers [116][117][118][119][120].…”

Section: Biomolecular Sensing At the Interface Between Chiral Metasurmentioning

confidence: 99%

Hyperbolic dispersion metasurfaces for molecular biosensing

et al. 2020

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Sensor technology has become increasingly crucial in medical research and clinical diagnostics to directly detect small numbers of low-molecular-weight biomolecules relevant for lethal diseases. In recent years, various technologies have been developed, a number of them becoming core label-free technologies for detection of cancer biomarkers and viruses. However, to radically improve early disease diagnostics, tracking of disease progression and evaluation of treatments, today’s biosensing techniques still require a radical innovation to deliver high sensitivity, specificity, diffusion-limited transport, and accuracy for both nucleic acids and proteins. In this review, we discuss both scientific and technological aspects of hyperbolic dispersion metasurfaces for molecular biosensing. Optical metasurfaces have offered the tantalizing opportunity to engineer wavefronts while its intrinsic nanoscale patterns promote tremendous molecular interactions and selective binding. Hyperbolic dispersion metasurfaces support high-k modes that proved to be extremely sensitive to minute concentrations of ultralow-molecular-weight proteins and nucleic acids.

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“…The nondiagonal response \sigma xy = \bigl( \sigma \bot -\sigma \| \bigr) sin 2\varphi /2, mixing p-and s-waves, arises here not due to an intrinsic chirality or magnetism of plasmonic layer, but follows only from a nonzero tilt of the plane of incidence of light with respect to the main axis, which corresponds to a socalled extrinsic chirality [123,124]. In the dipole and local response approximations the effective conductivities, describing the resonant interaction between the individual scatterers in a plasmonic layer, can be written in a general Lorentzian form:…”

Section: A Hyperbolic Plasmon-exciton Metasurfacesmentioning

confidence: 99%

Hyperbolic hybrid waves and optical topological transitions in few-layer anisotropic metasurfaces

Kotov

Lozovik

2019

Phys. Rev. B

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A comprehensive analysis of hybrid TM-TE polarized surface electromagnetic waves supported by different few-layer anisotropic metasurfaces is presented. A generalized 4\times 4 T-matrix formalism for arbitrary anisotropic 2D layers is developed, from which the general relations for the surface waves dispersions and scattering coefficients are deduced. Using this formalism and the effective conductivity approach, the dispersions and iso-frequency contours (IFCs) topology of the surface waves in various hybrid uniaxial metasurfaces are studied. The existence of hyperbolic plasmon-exciton polaritons in plasmon-exciton hybrids and hyperbolic acoustic waves with strong confinement in both out-of-plane and in-plane directions in uniaxial plasmonic bilayers are predicted. In plasmonic uniaxial metasurfaces on metal films, the elliptic and hyperbolic backward surface waves with negative group velocity are predicted and additional topological transitions in both elliptic and hyperbolic IFCs of the hybrid surface waves are revealed. Ultrathin twisted uniaxial plasmonic bilayers are proposed as systems with the IFCs topological transitions highly sensitive to the layers twist. The developed formalism may become a useful tool in the calculation of multifunctional few-layer metasurfaces or van der Waals heterostructures based on 2D materials with in-plane anisotropy, where the TM-TE polarization mixing must be considered. The predicted effects may open new horizons in the development and applications of planar optical technologies.plasmon-exciton polaritons (plexcitons [60]) may become a modern platform for ultrafast active control of light [38,39,61] and room temperature polariton lasing [62].Over the past few years, the 2D materials research has grown into the broader field, which includes the study of van der Waals heterostructures [63] and transdimensional materials [64]. Similar to van der Waals materials, which for some applications are more effective in a fewlayer configuration than in a monolayer one [58,59,65], the applicability of metasurfaces can be dramatically improved by going to the few layers. The multiplication of metasurface layers, while retaining a relatively low level of losses and fabrication simplicity, can provide higher efficiency and more degrees of freedom for manipulating the phase, amplitude, polarization, propagation, and dispersion of light [66,67]. Moreover, the layers interaction results in additional effects, including near-field coupling, WG modes, and multiple wave interference [68]. The WG effects enable us to control polarization and phase of the transmitted light simultaneously [69], while multiple interference effects can be used to cancel the undesired light and enhance the efficiency of antireflection coatings [70], polarization converters [71,72], and metalenses [73]. Near-field coupling generates a magnetic resonance inside the structure, which being effectively coupled to an in-layer electric resonance allows us to realize perfect absorbers and reflectors [74--76]. Such a magnetic ...

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Enhanced optical activity in hyperbolic metasurfaces

Cited by 52 publications

References 89 publications

The Optical Properties and Plasmonics of Anisotropic 2D Materials

The Optical Properties and Plasmonics of Anisotropic 2D Materials

Hyperbolic dispersion metasurfaces for molecular biosensing

Hyperbolic hybrid waves and optical topological transitions in few-layer anisotropic metasurfaces

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