Subwavelength Optical Engineering with Metasurface Waves

Abstract

Figure 3. Plasmonic superlens and hyperlens. a) Plasmonic EYI effect in structured metal film. Adapted with permission. [46] Copyright 2004, American Institute of Physics (AIP). b) Schematic of the optical system for the demonstration of thin film superlens. Adapted with permission. [49] Figure 11. Multifunctional metasurfaces. a) The far-field intensity distribution of wave-fronts with positive (red) and negative (blue) helicities emerging from segmented, interleaved, and harmonic response metasurfaces composed of gap-plasmon nanoantennas (inset). Adapted with permission. [167] Copyright 2016, AAAS. b) Schematic of the generation of a solid and a hollow spot at two wavelengths and the calculated intensity distribution in the focal plane. Adapted with permission. [12]

Achromatic Broadband Super‐Resolution Imaging by Super‐Oscillatory Metasurface

“…It is believed that such MF provides an access for far‐field and white‐light super‐oscillation imaging, which has potential promising applications in microscopes and telescope optics for bio imaging, astronomy observation, surveillance, and optical metrics. As a final remark, the super‐oscillation phenomenon can be regarded as one anomalous interference effect, which is different from the near‐field subwavelength interference known as “extraordinary Young's interference.”…”

“…In this article, a white‐light super‐oscillation imaging system is proposed by using the dispersionless spin–orbit interaction in geometric metasurfaces, which provides perfect 0 and π phase‐only manipulation for the white light. This unique property of metasurface avoids great chromatic phase aberration in conventional optics and helps to generate broadband super‐oscillation imaging feature.…”

Spin-Orbit Angular Momentum Conversion in Metamaterials and Metasurfaces

“…It is well known that, besides linear momentum, electromagnetic (EM) waves possess angular momentum (AM) [1,2,3,4,5], which can be decomposed into spin angular momentum (SAM) and orbital angular momentum (OAM). Circularly polarized waves carry SAM, quantized as ± per photon for left-hand circular (LHC) and righthand circular (RHC) polarization, respectively.…”

“…2D metamaterials, also known as metasurfaces [2,3,4], is an emerging interdisciplinary field which promotes the of use alternative approaches for light arXiv:1904.02647v2 [physics.optics] 25 Jul 2019 engineering based on subwavelength-thick metasurfaces built upon metaatoms, with spatially varying compositions. They exhibit remarkable properties in maneuvering light at a 2D interphase.…”

“…They exhibit remarkable properties in maneuvering light at a 2D interphase. Metasurfaces can not only achieve the functionalities of the 3D counterparts, such as negative refractive index and invisibility cloaking [8,7] but they can also resolve some of the current limits present in 3D metamaterials, such as dielectric loss or high resistive (ohmic) loss [1,2,3]. In addition, metasurfaces can be easily fabricated via standard nanofabrication approaches, such as electron-beam lithography, processes readily available in the semiconductor industry.…”