2016
DOI: 10.1063/1.4949007
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Invited Article: Broadband highly efficient dielectric metadevices for polarization control

Abstract: Metadevices based on dielectric nanostructured surfaces with both electric and magnetic Mietype resonances have resulted in the best efficiency to date for functional flat optics with only one disadvantage: a narrow operational bandwidth. Here we experimentally demonstrate broadband transparent all-dielectric metasurfaces for highly efficient polarization manipulation. We utilize the generalized Huygens principle, with a superposition of the scattering contributions from several electric and magnetic multipola… Show more

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Cited by 357 publications
(290 citation statements)
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“…As plasmonic metasurfaces suffer from increasing dissipative losses at optical frequencies, as well as several undesirable loss channels occurring during the phase‐modulation process, such as diffraction, ordinary reflection/refraction, and polarization conversion losses, this initiates a new branch of research working with the dielectric analogs of metasurfaces. The high‐refractive‐index dielectric nanoparticles or nanodisks were found to be able to generate spectrally overlapping electric and magnetic resonances with comparable strengths, which is critical for the achievement of an optimal transmitted efficiency with the Huygens' metasurfaces . Different from their metallic counterparts where the high metallic losses at visible frequencies cause vanishing fields inside nanoparticles and thus lead to a negligible magnetic response, dielectric nanoparticles with their low intrinsic losses are able to couple the incoming wave to generate circular displacement currents inside the nanostructures and give rise to a strong magnetic dipole resonance ( Figure a,b) .…”
Section: Fundamental Theoretical Background – Generalized Snell's Lawmentioning
confidence: 99%
“…As plasmonic metasurfaces suffer from increasing dissipative losses at optical frequencies, as well as several undesirable loss channels occurring during the phase‐modulation process, such as diffraction, ordinary reflection/refraction, and polarization conversion losses, this initiates a new branch of research working with the dielectric analogs of metasurfaces. The high‐refractive‐index dielectric nanoparticles or nanodisks were found to be able to generate spectrally overlapping electric and magnetic resonances with comparable strengths, which is critical for the achievement of an optimal transmitted efficiency with the Huygens' metasurfaces . Different from their metallic counterparts where the high metallic losses at visible frequencies cause vanishing fields inside nanoparticles and thus lead to a negligible magnetic response, dielectric nanoparticles with their low intrinsic losses are able to couple the incoming wave to generate circular displacement currents inside the nanostructures and give rise to a strong magnetic dipole resonance ( Figure a,b) .…”
Section: Fundamental Theoretical Background – Generalized Snell's Lawmentioning
confidence: 99%
“…We notice that S. Kruk et al . have reported a dielectric metasurface that its artificial birefringence reached 0.3 to realize polarization conversion in the 1550 nm band38. The basic principle of these two works is the same that the device controls specific spatial phase distribution by using the gradient changes of its subwavelength structure units, so as to realize large artificial birefringence and polarization conversion effectively.…”
Section: Resultsmentioning
confidence: 99%
“…Ultra-thin metasurfaces consisting of subwavelength-scale structures have also been proposed to push the performance limits of blazed gratings operating at visible and infrared wavelengths. Initial metasurface-based deflectors took the form of titanium dioxide waveguide ensembles, 18 and more recent advances in this field have incorporated a range of geometrically simple [19][20][21][22][23] and topologically complex [24][25][26][27][28] nanowaveguide and nanoresonator architectures [ Fig. 1(d)].…”
Section: © 2018 Author(s) All Article Content Except Where Otherwismentioning
confidence: 99%