Zobrazeno 1 - 10
of 11
pro vyhledávání: '"Xu, Yadong"'
In conventional plasmonic media and plasmonic metamaterials, such as metallic wire mesh, longitudinal mode of electromagnetic wave manifests itself in frequency overlapping transverse modes, which impedes clear observation of longitudinal-mode-specif
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a70bb6b3588b99c5d8f10d08673ff8fd
http://arxiv.org/abs/2303.11558
http://arxiv.org/abs/2303.11558
Phase gradient metagratings/metasurfaces (PGMs) have provided a new paradigm for light manipulations. In this work, we will show the existence of gauge invariance in PGMs, i.e., the diffraction law of PGMs is independent of the choice of initial valu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d9dbef90105a6f7764c554de02c9d39e
In this work we present a new mechanism for designing phase-gradient metasurfaces (PGMs) to control an electromagnetic wavefront with high efficiency. Specifically, we design a transmission-type PGM formed by a periodic subwavelength metallic slit ar
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::605eaa8346561fb71fb40ce3d6fcafac
Conjugate metamaterials, in which the permittivity and the permeability are complex conjugates of each other, possess the elements of loss and gain simultaneously. By employing a conjugate metamaterial with a purely imaginary form, we propose a mecha
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::af4b8d98a5881b7ee186872e8a9a5c8a
http://arxiv.org/abs/1708.02004
http://arxiv.org/abs/1708.02004
By introducing a new mechanism based on purely imaginary conjugate metamaterials (PICMs), we reveal that bidirectional negative refraction and planar focusing can be obtained using a pair of PICMs, which is a breakthrough to the unidirectional limit
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::80433531af2e5cb60df3de86396ffdf7
Surface polaritons, e.g., surface plasmon polaritons, are invaluable tools in nanophotonics. However, considerable plasmon loss narrows the application regime of plasmonic devices. Here we reveal some general conditions for lossless surface polariton
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a5c309c7fe6622a8b1c18bd28a8ddd20
http://arxiv.org/abs/1602.01926
http://arxiv.org/abs/1602.01926
A simple core-shell two-dimensional photonic crystal is studied where the triangle lattice symmetry and $C_{6v}$ rotation symmetry leads to rich physics in the study of accidental degeneracy's in photonic bands. We systematically evaluate different t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7275cc734e4fc43a32a41fdb9fb3ed12
http://arxiv.org/abs/1601.03168
http://arxiv.org/abs/1601.03168
In this letter, we show how transformation optics makes it possible to design what we call conjugate metamaterials. We show that these materials can also serve as substrates for making a subwavelength-resolution lens. The so-called "perfect lens", wh
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3fc6d4ba3685ceeafc7cba0fde76e437
The original carpet cloak [Phys. Rev. Lett. 101, 203901 (2008)] was designed by a numerical method, the quasi-conformal mapping. Therefore its refractive index profile was obtained numerically. In this letter, we propose a new carpet cloak based on t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b7b0d8e4cc3770ad9fed55541e5444c7
Plane mirror can make one object into two for observers on the object's side. Yet, there seems no way to achieve the same effect for observers from all directions. In this letter, we will design a new class of gradient index lenses from multivalued o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cd18d3085d56ecbc85ea0e0074dab680
http://arxiv.org/abs/1108.3496
http://arxiv.org/abs/1108.3496