Subdiffractional focusing and guiding of polaritonic rays in a natural hyperbolic material

Dai, Siyuan; Ma, Qiong; Andersen, Trond I.; McLeod, Alex; Fei, Zhe; Liu, M. K.; Wagner, Martin; Watanabe, Kenji; Taniguchi, Takashi; Thiemens, M. H.; Keilmann, F.; Jarillo‐Herrero, Pablo; Fogler, M. M.; Basov, D. N.

doi:10.1038/ncomms7963

Cited by 372 publications

(446 citation statements)

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“…Outside of these spectral bands, both the in-and out-of-plane components of the permittivity are positive, though highly birefringent. The hyperbolic nature of hBN has been demonstrated as a means to realize mid-infrared hyperlensing from a natural, unpatterned slab [35,36], as well as allows one to increase lifetime of graphene plasmons and enables gate tunable hyperbolic response in graphene/hBN heterostructures [37][38][39][40]. This occurs due to only ε z exhibiting resonant behavior at 820 cm −1 , while scattering of light is governed only by the in-plane permittivity ε t at normal incidence.…”

Section: Theorymentioning

confidence: 99%

Perfect interferenceless absorption at infrared frequencies by a van der Waals crystal

et al. 2015

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Traditionally, efforts to achieve perfect absorption have required the use of complicated metamaterial-based structures as well as relying on destructive interference to eliminate back reflections. Here, we have demonstrated both theoretically and experimentally that such perfect absorption can be achieved using a naturally occurring material, hexagonal boron nitride (hBN) due to its high optical anisotropy without the requirement of interference effects to absorb the incident field. This effect was observed for p-polarized light within the mid-infrared spectral range, and we provide the full theory describing the origin of the perfect absorption as well as the methodology for achieving this effect with other materials. Furthermore, while this is reported for the uniaxial crystal hBN, this is equally applicable to biaxial crystals and more complicated crystal structures. Interferenceless absorption is of fundamental interest to the field of optics; moreover, such materials may provide additional layers of flexibility in the design of frequency selective surfaces, absorbing coatings, and sensing devices operating in the infrared.

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Section: Theorymentioning

confidence: 99%

Perfect interferenceless absorption at infrared frequencies by a van der Waals crystal

et al. 2015

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“…1(a). Specific realizations include natural two-dimensional anisotropic materials such as hexagonal boron nitride [38][39][40] , plasmonic gratings of different geometries 41,42 , or patterned graphene nanostructures 23,43 . For microwaves, such anisotropic metasurfaces can be realized with the LC contours 44 .…”

Section: Dispersion Of Hybrid Surface Wavesmentioning

confidence: 99%

Spin control of light with hyperbolic metasurfaces

et al. 2016

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Transverse spin angular momentum is an inherent feature of evanescent waves which may have applications in nanoscale optomechanics, spintronics, and quantum information technology due to the robust spin-directional coupling. Here we analyze a local spin angular momentum density of hybrid surface waves propagating along anisotropic hyperbolic metasurfaces. We reveal that, in contrast to bulk plane waves and conventional surface plasmons at isotropic interfaces, the spin of the hybrid surface waves can be engineered to have an arbitrary angle with the propagation direction. This property allows to tailor directivity of surface waves via the magnetic control of the spin projection of quantum emitters, and it can be useful for optically controlled spin transfer.

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“…Apart from graphene, h-BN is a van der Walls crystal [18] as well as a wide bandgap (~6 eV) electrical insulator. Furthermore, h-BN also shows natural hyperbolicity [19][20][21][22][23], which means that the relative dielectric constants in-plane and out-of-plane have opposite signs. This property leads to a hyperbolic or indefinite dispersion for electromagnetic waves propagating inside such a material and results in the excitation of surface phonon-polariton mode.…”

Section: Introductionmentioning

confidence: 99%

Graphene-Hexagonal Boron Nitride Heterostructure as a Tunable Phonon–Plasmon Coupling System

Liu

et al. 2017

Crystals

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Abstract:The layered van der Waals (vdW) heterostructure, assembled from monolayer graphene, hexagonal boron nitride (h-BN) and other atomic crystals in various combinations, is emerging as a new paradigm with which to attain desired electronic and optical properties. In this paper, we study theoretically the mid-infrared optical properties of the vdW heterostructure based on the graphene-h-BN system. The light-matter interaction of this heterostructure system is described by the hyperbolic phonon-plasmon polaritons which originate from the coupling modes of surface plasmon polaritons (SPPs) in graphene with hyperbolic phonon polaritons (HPPs) in h-BN. By numerical simulation, we find that the coupling modes are governed by the Fermi level of monolayer graphene, the thickness of the h-BN slab and the mode excitation sequence of SPPs and HPPs. Moreover, the response of the coupling modes of the graphene-h-BN heterostructure on a noble metal layer is also proposed in this paper.

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Subdiffractional focusing and guiding of polaritonic rays in a natural hyperbolic material

Cited by 372 publications

References 54 publications

Perfect interferenceless absorption at infrared frequencies by a van der Waals crystal

Perfect interferenceless absorption at infrared frequencies by a van der Waals crystal

Spin control of light with hyperbolic metasurfaces

Graphene-Hexagonal Boron Nitride Heterostructure as a Tunable Phonon–Plasmon Coupling System

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