Amplitude- and Phase-Controlled Surface Plasmon Polariton Excitation with Metasurfaces

Mühlenbernd, Holger; Georgi, Philip; Pholchai, Nitipat; Huang, Lingling; Li, Guixin; Zhang, Shuang; Zentgraf, Thomas

doi:10.1021/acsphotonics.5b00536

Cited by 48 publications

(35 citation statements)

References 26 publications

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“…A different set of SPP couplers are formed by arrays of anisotropic rectangular apertures in opaque metal films, which can convert CP light to SPPs . Lin et al experimentally demonstrated a spin‐dependent directional SPP coupler containing arrays of rectangular apertures with principle axes perpendicular to each other (see Figure d) .…”

Section: Applicationsmentioning

confidence: 99%

“…As two columns with orthogonally oriented apertures are placed at a distance of quarter of SPP wavelength, the interference between launched SPPs yields directional SPP excitations dictated solely by the helicity of incident CP light (Figure d) . While such concept is already intimately linked with the PB concept, an alternative approach is to directly use PB metasurfaces . Arranging anisotropic apertures in a lattice with their principle axes rotating successively, the designed PB metasurface can provide spin‐dependent phase gradients to compensate the k‐mismatch between incident CP light and the eigen SPPs on the metal film.…”

Section: Applicationsmentioning

confidence: 99%

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High‐Efficiency Metasurfaces: Principles, Realizations, and Applications

Sun

Xiao

et al. 2018

Advanced Optical Materials

295

157

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application demands in different aspects, such as information communications, national defenses, security and sensing, and energy utilizations. A key scientific issue, commonly requested in all those applications, is how to efficiently control EM waves at will based on devices/systems with physical sizes as miniaturized as possible. Conventional devices (such as lens, mirror, polarizer, etc.) to control EM waves are made by naturally existing dielectric materials. However, since these materials possess very limited variation range of permittivity, conventional devices typically exhibit bulky sizes and curved shapes to ensure enough propagating phases accumulated to achieve certain functionality. In addition, conventional devices do not necessarily exhibit high working efficiencies, due to the impedance-mismatch issues caused by lacking magnetic responses in natural materials.Metamaterials (MTMs), 3D artificial materials composed by array of subwavelength microstructures (e.g., "metaatoms") with tailored EM responses, provide the possibility to solve the above grand challenges. Through careful structural tuning, MTMs can in principle be designed to exhibit arbitrary values of permittivity ε and permeability μ, and thus they exhibit significantly strengthened capabilities to control EM waves, generating many fascinating wave-manipulation effects not achievable with naturally existing materials. [1][2][3][4][5][6] However, despite of great successes already achieved, applications of the new concepts proposed based on 3D MTMs are hampered by the device sizes, losses in metallic structures, and fabrication challenges of complex 3D MTM structures.Metasurfaces are probably the best candidate to solve the issues of 3D MTMs. Simply speaking, metasurfaces can be viewed as the 2D version of MTMs, which are constructed by planar meta-atoms with purposely selected EM responses arranged in some specific orders. However, the working principles of metasurfaces are quite different from that of 3D MTMs in controlling EM waves. Whereas typically 3D MTMs still reply on manipulating the propagating phases inside the bulk media to realize certain wave-control effects, metasurfaces largely utilize the abrupt phase changes on the structure surfaces for transmitted or reflected waves. In general, tailoring the spatial inhomogeneity of metasurfaces to make them exhibit certain predetermined phase distributions for transmitted or reflected wave, one can use them to efficiently reshape the wave-fronts of Metasurfaces are planar metamaterials exhibiting certain inhomogeneous phase distributions for transmitted or reflected waves, which can efficiently reshape the wave-fronts of incident beams in desired manners based on the Huygens principle. Due to their exotic abilities to freely manipulate electromagnetic (EM) waves on a flat and ultrathin platform, metasurfaces have attracted intensive attention recently, resulting in numerous new concepts and effects that could possibly find applications in many different aspects. In this article, the k...

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Section: Applicationsmentioning

confidence: 99%

Section: Applicationsmentioning

confidence: 99%

High‐Efficiency Metasurfaces: Principles, Realizations, and Applications

Sun

Xiao

et al. 2018

Advanced Optical Materials

295

157

View full text Add to dashboard Cite

show abstract

“…However, conventional imaging or holography techniques are usually limited by the amplitude‐ or phase‐only modulation schemes, which is not the full information of object images . Independently simultaneous control of amplitude and phase with metasurfaces requires more degree of freedom to manipulate the optical field, without introducing unpractical nanostructures . Kim et al proposed a nanorod gap‐surface plasmon resonator to form Huygens' metasurfaces in the optical waveband ( Figure a) .…”

Section: D Manipulation Of Optical Waves With Metasurfacesmentioning

confidence: 99%

From Single‐Dimensional to Multidimensional Manipulation of Optical Waves with Metasurfaces

et al. 2019

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given refractive indices. The limited refractive indices of natural materials prevent the generation of new optical phenomena. The size and weight of traditional optical devices also prevent optical system miniaturization and integration. Nowadays, there is an everincreasing demand for new approaches to implement the effective manipulation of optical waves in different dimensions and to get the novel optical devices on demand.With the development of nanofabrication technology, artificial nanostructures become approachable which offer a promising solution to the achievement of efficient manipulation of optical waves in different dimensions. Metamaterials, which attain their optical functionalities from the subwavelength structures rather than their constitutive materials, provided intriguing possibilities for the evolution of modern optics and have attracted great interest from the scientific community over the past twenty years. [1][2][3] By judiciously modulating their subwavelength structure parameters, the effective values of the permeability and permittivity of the metamaterials can be designed on purpose to realize the manipulation of optical waves in a spectific dimension and to get the desirable optical functionalities, which are even not achievable with natural materials. Previous works have demonstrated that metamaterials can be widely applied in realizing negative refractive index, [4][5][6] electromagnetic invisibility cloaks, [7,8] optical black holes, [9] chiral media, [10,11] and so on. However, the commercialization of metamaterial-based optical devices in real applications is still challenging, which we ascribe to the strong dispersion and high losses associated with typically used metallic structures, and also the difficult and costly fabrication for 3D designs.Recently, planar metamaterials or metasurfaces have received great attention for their advantages to meet these challenges. [12][13][14] Compared to metamaterials, metasurfaces, as artificial planar designs, have dramatically reduced the fabrication complexity. Moreover, the thickness of metasurfaces is less than or similar to the wavelength of operating waves, which results in the reduction of the undesirable losses and offers an effective manner for implementing tunable and reconfigurable optical devices. Overall, metasurfaces provide an effective way to overcome the challenges in metamaterials, and it has been successfully proven that metasurfaces are more feasible for the engineering of the fundamental dimensions of optical Metasurfaces, 2D artificial arrays of subwavelength elements, have attracted great interest from the optical scientific community in recent years because they provide versatile possibilities for the manipulation of optical waves and promise an effective way for miniaturization and integration of optical devices. In the past decade, the main efforts were focused on the realization of single-dimensional (amplitude, frequency, polarization, or phase) manipulation of optical waves. Compared to the metasurfaces with sing...

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“…Metasurfaces can support a rich variety of optical modes that enable a straightforward strong coupling of light in their subwavelength thickness. Furthermore, their optical response can be made broadly tunable through changes in their environment, enabling a dynamic shaping of the amplitude and phase of light . Such tunability also opens the way to using metasurfaces as “wireless” sensors allowing an optical monitoring of their environment.…”

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confidence: 99%