All-dielectric phase-change reconfigurable metasurface

Karvounis, Artemios; Gholipour, Behrad; MacDonald, Kevin F.; Zheludev, Nikolay I.

doi:10.1063/1.4959272

Cited by 246 publications

(198 citation statements)

References 37 publications

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“…An early work based on the integration of a chalcogenide glass gallium lanthanum sulfide (GLS) layer with a Fano‐resonant planar metamaterial is reported to modulate the relative transmittance of NIR EM waves by more than 60% with a thermally induced phase transition . Following this work, lots of research efforts have been dedicated to realize the efficient and fast modulation of transmissions or reflections of EM waves with GST . One metasurface structure proposed by Tittl et al is depicted in Figure a, where aluminum (Al) square antennas are fabricated on a GST layer on top an Al mirror.…”

Section: Tuning Via Phase Transitionsmentioning

confidence: 99%

Tunable Metasurfaces Based on Active Materials

Cui

Bai

Sun

2019

Adv Funct Materials

215

111

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Metasurfaces, planer artificial materials composed of subwavelength unit cells, have shown superior abilities to manipulate the wavefronts of electromagnetic waves. In the last few years, metasurfaces have been a burgeoning field of research, with a large variety of functional devices, including planar lenses, beam deflectors, polarization converters, and metaholograms, being demonstrated. Up to date, the majority of metasurfaces cannot be tuned postfabrication. Yet, the dynamic control of optical properties of metasurfaces is highly desirable for a plethora of applications including free space optical communications, holographic displays, and depth sensing. Recently, much effort has been made to exploit active materials, whose optical properties can be controlled under external stimuli, for the dynamic control of metasurfaces. The tunability enabled by active materials can be attributed to various mechanisms, including but not limited to thermo‐optic effects, free‐carrier effects, and phase transitions. This short review summarizes the recent progress on tunable metasurfaces based on various approaches and analyzes their respective advantages and challenges to be confronted with. A number of potential future directions are also discussed at the end.

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Section: Tuning Via Phase Transitionsmentioning

confidence: 99%

Tunable Metasurfaces Based on Active Materials

Cui

Bai

Sun

2019

Adv Funct Materials

215

111

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“…By using active materials that have tunable optical properties under different external conditions, such as phase change material (PCM), [33,34] plasmonic material (Mg/MgH 2 ), [35][36][37][38] and graphene/graphene oxide, [39] the switchable metasurface holograms can be designed. By using active materials that have tunable optical properties under different external conditions, such as phase change material (PCM), [33,34] plasmonic material (Mg/MgH 2 ), [35][36][37][38] and graphene/graphene oxide, [39] the switchable metasurface holograms can be designed.…”

Section: As Shown Inmentioning

confidence: 99%

Quantitatively Correlated Amplitude Holography Based on Photon Sieves

Huang

et al. 2019

Advanced Optical Materials

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source method, panel method, Fresnel diffraction method, and angular spectrum method. These algorithms can realize both 2D and 3D holography reconstruction at any distance between hologram and image plane. [6] In addition, there are also some adaptive methods for holographic-related technology of many specific functions. [7] Meanwhile, conventional CGHs based on spatial light modulators (SLM) inevitably generate reconstruction images with limited resolution and low field-of-view (FOV) because of large pixel size compared with wavelength. [8] Hence, sub-wavelength pixel size, high-resolution devices are highly demanded.Metasurfaces are ultrathin, artificial layered devices that are composed of nanoantenna or nanoresonator arrays, which have shown great promises for manipulating the phase, amplitude, polarization, angular momentum, and frequency of light with prior spatial resolution. [9][10][11][12][13][14] In previously reported works, phase-only metasurface holograms are employed most widely due to the excellent wavefront modulation properties. Abrupt phase discontinuities can be generated within ultrashort distance, and different phase modulation methods by means of resonance phase [15][16][17][18][19] or Pancharatnam-Berry (PB) phase [7,17,[19][20][21] have been revealed. In the phaseonly holographic algorithm, the amplitude distribution is usually uniform. However, as another important design freedom, the amplitude can also be applied to the reconstruction of the target image, known as amplitude holography. In particular, the transitivity or reflectivity of the local unit can be quantitatively divided to different amplitude levels. For simplicity, binary amplitude modulation, that is, 1 bit digital coding of 0 and 1, can also reproduce holographic images with satisfactory quality. For example, binary amplitude holography based on the scattering of carbon nanotubes array has been demonstrated. [22] Specially, photon sieves consisting of randomly distributed nanoholes are among the simplest and effective amplitude modulation schemes of all the metasurface devices. Such photon sieves can possess extraordinary transmission properties. One of its application is to replace the translucent bands of Fresnel zone plates to effectively enhance the focusing behavior. [23][24][25] In addition, the concept of photon sieves is also adopted to reconstruct the diffraction beams and vortex beams. [26][27][28] Because of the simple fabrication and polarization-independent properties, photon sieves can be used as an ideal medium for binary As an excellent holographic information carrier, metasurface holograms possess the advantages of subwavelength footprint, leading to large field of view and high resolution. Meanwhile, intelligent algorithms should be developed to fully exploit the flexible modulation properties provided by metasurfaces. Here, two amplitude holograms with quantitatively correlation are realized using the photon sieve as the amplitude modulation device. A new iterative algorithm is developed to obtain the ampl...

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Section: Introductionmentioning

confidence: 99%

“…In recent years, the field of photonic metamaterials research has migrated from the study of almost exclusively plasmonic metal nanostructures to embrace a variety of advanced material platforms, including semiconductors, superconductors, transparent conductive oxides, nitrides, phase-change media, and topological insulators. Opticallyand electronically-actuated reconfigurable photonic metasurfaces based on such materials offer a range of low-loss, nonlinear, tunable and switchable optical functionalities in ultra-compact form-factor, greatly extending the already remarkable range of unusual and enhanced optical properties available 'on demand' [1] via the metamaterials paradigm -for example, engaging nano(opto)mechanical [2], phase-change [3], and coherent control [4] response mechanisms to serve signal modulation, spectral/polarization selection or dispersion manipulation applications.Realizing their full applications potential though, requires in many cases the integration of metasurface structures and metadevices with existing photonic and optoelectronic technology platforms, not least optical fibers -whereby they may serve a variety of ICT and sensing applications. Here we review recent advances in metamaterials research towards this goal, considering several approaches to the integration of functional nanostructures with optical fibers.…”

mentioning

confidence: 99%

“…Opticallyand electronically-actuated reconfigurable photonic metasurfaces based on such materials offer a range of low-loss, nonlinear, tunable and switchable optical functionalities in ultra-compact form-factor, greatly extending the already remarkable range of unusual and enhanced optical properties available 'on demand' [1] via the metamaterials paradigm -for example, engaging nano(opto)mechanical [2], phase-change [3], and coherent control [4] response mechanisms to serve signal modulation, spectral/polarization selection or dispersion manipulation applications.…”

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confidence: 99%

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Merging Photonic Metamaterial and Optical Fiber Technologies

Xomalis

Piccinotti

Karvounis

et al. 2017

Advanced Photonics 2017 (IPR, NOMA, Sensors, Networks, SPPCom, PS)

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Abstract:We report on approaches to the integration of metasurfaces and active metadevices with optical fiber platforms, including all-optical and electro-optic nano-mechanical switching devices, dispersion control solutions and coherent absorption modulators. In recent years, the field of photonic metamaterials research has migrated from the study of almost exclusively plasmonic metal nanostructures to embrace a variety of advanced material platforms, including semiconductors, superconductors, transparent conductive oxides, nitrides, phase-change media, and topological insulators. Opticallyand electronically-actuated reconfigurable photonic metasurfaces based on such materials offer a range of low-loss, nonlinear, tunable and switchable optical functionalities in ultra-compact form-factor, greatly extending the already remarkable range of unusual and enhanced optical properties available 'on demand' [1] via the metamaterials paradigm -for example, engaging nano(opto)mechanical [2], phase-change [3], and coherent control [4] response mechanisms to serve signal modulation, spectral/polarization selection or dispersion manipulation applications.Realizing their full applications potential though, requires in many cases the integration of metasurface structures and metadevices with existing photonic and optoelectronic technology platforms, not least optical fibers -whereby they may serve a variety of ICT and sensing applications. Here we review recent advances in metamaterials research towards this goal, considering several approaches to the integration of functional nanostructures with optical fibers.'Single-ended' fiber-optic metadevices, for example, may be realized by fabricating metasurface nanostructures directly on the end facets of cleaved fibers, as illustrated in Fig. 1, which shows a dispersion-control silicon metasurface manufactured on a single-mode fiber tip, with sharply resonant transmission properties set by structural design.

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All-dielectric phase-change reconfigurable metasurface

Cited by 246 publications

References 37 publications

Tunable Metasurfaces Based on Active Materials

Tunable Metasurfaces Based on Active Materials

Quantitatively Correlated Amplitude Holography Based on Photon Sieves

Merging Photonic Metamaterial and Optical Fiber Technologies

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