A reversible 2H-to-1T phase transition in a MoS2 monolayer is realized by plasmonic hot electrons. This can be actively controlled the incident light intensity, wavelength, sample areas, and perimeters, resulting an effective shift of photoluminescence. The suggested configuration paves way for optoelectronic device applications future. As service to our authors readers, this journal provides supporting information supplied authors. Such materials are peer reviewed may re-organized online...

Plasmon-mediated photocatalytic systems generally suffer from poor efficiency due to weak absorption overlap and thus limited energy transfer between the plasmonic metal semiconductor. Herein, a near-ideal plasmon-mediated photocatalyst system is developed. Au/CdSe nanocrystal clusters (NCs) are successfully fabricated through facile emulsion-based self-assembly approach, containing Au nanoparticles (NPs) of size 2.8, 4.6, 7.2, or 9.0 nm CdSe quantum dots (QDs) ≈3.3 nm. Under visible-light...

Vector vortex beams (VVBs) possess ubiquitous applications from particle trapping to quantum information. Recently, the bulky optical devices for generating VVBs have been miniaturized by using metasurfaces. Nevertheless, it is quite challenging metasurface-generated arbitrary polarization and phase distributions. More critical that VVBs' annular intensity profiles demonstrated hitherto are dependent on topological charges hence not perfect, posing difficulties in spatially shared...

The colour gamut, a two-dimensional (2D) space primarily comprising hue and saturation (HS), lays the most important foundation for display printing industries. Recently, metasurface has been considered promising paradigm nanoprinting holographic imaging, demonstrating subwavelength image resolution, flat profile, high durability, multi-functionalities. Much effort devoted to broaden 2D HS plane, also known as CIE map. However, brightness (B), carrier of chiaroscuro information, long...

A Jones matrix with an upper limit of six degrees freedom planar structure can be constructed by metasurfaces.

Metasurfaces, artificial 2D structures, have been widely used for the design of various functionalities in optics. Jones matrix, a 2×2 matrix with eight parameters, provides most complete characterization metasurface structures linear optics, and number free parameters (i.e., degrees freedom, DOFs) determines limit to what we can realize. Great efforts made continuously expand DOFs, maximal six has achieved recently. However, realization ultimate goal DOFs (full parameters) proven as great...

Objects with different shapes, materials and temperatures can emit distinct polarizations spectral information in mid-infrared band, which provides a unique signature the transparent window for object identification. However, crosstalk among various polarization wavelength channels prevents from accurate detections at high signal-to-noise ratio. Here, we report full-polarization metasurfaces to break inherent eigen-polarization constraint over wavelengths mid-infrared. This recipe enables...

Abstract Printing image based on metasurface has attracted enormous research interests due to its subwavelength resolution, full‐color printing, and durable properties. Based the spatially multiplexed pixels, printing using can be switched optically by altering optical parameters, such as polarization incident wavelength. However, pixel design several problems, including cross‐talk among different wavelengths, limitation linear polarizations, incapability for incident‐angle control. Here, a...

A strong chiral optical response induced at a plasmonic Fano resonance in planar Au heptamer nanostructure was experimentally and theoretically demonstrated. The scattering spectra show the characteristic narrow-band feature of resonances for both left right circular polarized lights, with reaching 30% resonance. Specifically, we systematically investigate heptamers gradually changing inter-particle rotation angles separation distance. spectral characteristics clearly depend on strength...

The semiconductor quantum dot (QD) has been successfully demonstrated as a potentially scalable and on-chip integration technology to generate the triggered photon streams that have many important applications in information science. However, randomicity of these emitted from QD seriously compromises its use especially hinders on-demand manipulation spin states. Here, by accurately integrating mirror image onto two foci bifocal metalens, we demonstrate generation separation states single...

Plasmonic Fano resonances are typically understood and investigated assuming electrical mode hybridization. Here we demonstrate that a purely magnetic plasmon resonance can be realized at optical frequency with Au split ring hexamer nanostructure excited by an azimuthally polarized incident light. Collective modes induced the circular electric field within each of controlled effectively hybridized designing size orientation unit. With simulated results reproducing experiment, our suggested...

Abstract Plasmonic toroidal resonance has attracted growing interests because of its low loss electromagnetic properties and potential high sensitive nanophotonic applications. However, the realization in a metamaterial requires three-dimensional complicated structural design so far. In this paper, we simple metal-dielectric-metal (MIM) sandwich nanostructure, which exhibits strong dipolar under radially polarized excitation. The dipole moment as dominant contribution for scattering is...

Geometric metasurfaces have shown great potential in holography due to their straightforward geometric nature of phase control. The incident angles, spins, and wavelengths the light provide various degrees freedom multiplex metasurface holographic images, which, however, are usually interrelated hence challenging be fully decoupled. Here, we report a synergetic recipe break such seemingly inevitable interrelation by incorporating an effective point source (a pinhole), with which spin,...

Optical biosensors based on micro/nanofibers are highly valuable for probing and monitoring liquid environments bioactivity. Most current optical biosensors, however, still glass, semiconductors, or metallic materials, which might not be fully suitable biologically relevant environments. Here, we introduce biocompatible flexible microfibers from lotus silk as microenvironmental monitors that exhibit waveguiding of intrinsic fluorescence well coupled light. These features make single-filament...

A multifocal metalens, which focuses incident light at multiple foci, has many applications in imaging systems and optical communications. However, the traditional design strategy of a metalens combines several lenses that have different focal points into planar integrated unit, resulting low quality because high background noise. Here we show defects method can be overcome by designing with conic shapes (the ellipse hyperbola); this approach could improve performance substantially decrease...

The manipulation of surface plasmon polariton (SPP) propagation is a basic subject for the realization novel optical devices. Although unidirectional SPP launcher has been demonstrated, it difficult to realize active control suitable device applications. Here, we propose graphene with electrically controllable SPPs. source/drain electrode this made reflective antenna pair structure, its resonance controlled by corresponding applied voltage. With appropriate source and drain bias, can serve...

The delivery of optical signals from an external light source to a nanoscale waveguide is highly important for the development nanophotonic circuits. However, efficient coupling energy into components difficult and still remains challenge. Herein, we use silica nanofiber up organic–inorganic hybrid nanowaveguide, namely, system composed polymer filament doped with MoS2 quantum dots. Nanofiber-excited nanowaveguides in crossed geometry are found asymmetrically couple excitation along two...

Ellipse and hyperbola are two well-known curves in mathematics with numerous applications various fields, but their properties inherent differences spin optics less understood. Here, we investigate the peculiar optical of establish a connection between foci states incident light by introducing geometric-phase distribution along conic curve. We show that Hall effect is intrinsic property ellipse, where photons different can be exactly separated to each its foci, while exhibits spin-selective...

Abstract With the evergrowing demand for miniaturization of photonic devices, integration different functionalities in a single module is highly desired next generation ultracompact devices. Optical modules based on near field and scattered far are both key elements construction nanophotonic However, integrating near‐ far‐field into great challenge, which hinders minimization optical Here, bifunctional integrated launcher with metasurface structure theoretically proposed experimentally...

With the recent development of metasurface, generating an optical vortex in far or near fields is realized various ways. However, to generate vortices both and simultaneously still a challenge, although it has great potential future compact versatile photonic system. Here, bi-channel generator proposed demonstrated within single where surface plasmon far-field can be generated under circularly polarized light. The ability with arbitrary topological charges experimentally demonstrated, which...

Abstract Metasurfaces are ultrathin optical elements that can manipulate the light at subwavelength scale. The input on metasurface be converted into output with abrupt changes of amplitude, phase, and polarization (APP) properties. However, a simultaneous arbitrary conversion all three properties is not yet realized. In this paper, Jones matrix minimal number four degrees freedom enables between two states APP distributions proposed. constructed dielectric experimentally verified for...

Abstract To achieve optoelectronic devices with high resolution and efficiency, there is a pressing need for optical structural units that possess an ultrasmall footprint yet exhibit strong controllability in both the frequency spatial domains. For dielectric nanoparticles, overlap of electric magnetic dipole moments can scatter light completely forward or backward, which called Kerker theory. This effect expand to any multipoles directions, re‐named as generalized effect, realize...

The emergence of the metasurface has provided a versatile platform for manipulation light at nanoscale. Recent research in metasurfaces explored plethora dynamic control and switching multifunctionalities, paving way innovative applications fields such as imaging, sensing, communication. However, current multifunctional face challenges terms functional scalability selective activation. In this work, we introduce experimentally demonstrate strategy that utilizes multiple plane waves to create...