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Terahertz wave interaction with metallic nanostructures

Terahertz wave interaction with metallic nanostructures

Understanding light interaction with metallic structures provides opportunities of manipulation of light, and is at the core of various research areas including terahertz (THz) optics from which diverse applications are now emerging. For instance, …

Metamaterial superconductors

Metamaterial superconductors

Searching for natural materials exhibiting larger electron-electron interactions constitutes a traditional approach to high-temperature superconductivity research. Very recently, we pointed out that the newly developed field of electromagnetic …

Six-port optical switch for cluster-mesh photonic network-on-chip

Six-port optical switch for cluster-mesh photonic network-on-chip

Photonic network-on-chip for high-performance multi-core processors has attracted substantial interest in recent years as it offers a systematic method to meet the demand of large bandwidth, low latency and low power dissipation. In this paper we …

Atto-Joule, high-speed, low-loss plasmonic modulator based on adiabatic coupled waveguides

Atto-Joule, high-speed, low-loss plasmonic modulator based on adiabatic coupled waveguides

In atomic multi-level systems, adiabatic elimination (AE) is a method used to minimize complicity of the system by eliminating irrelevant and strongly coupled levels by detuning them from one another. Such a three-level system, for instance, can be …

Bianisotropic metasurfaces: physics and applications

Bianisotropic metasurfaces: physics and applications

Metasurfaces as optically thin composite layers can be modeled as electric and magnetic surface current sheets flowing in the layer volume in the metasurface plane. In the most general linear metasurface, the electric surface current can be induced …

Enhanced broadband absorption in nanowire arrays with integrated Bragg reflectors

Enhanced broadband absorption in nanowire arrays with integrated Bragg reflectors

A near-unity unselective absorption spectrum is desirable for high-performance photovoltaics. Nanowire (NW) arrays are promising candidates for efficient solar cells due to nanophotonic absorption resonances in the solar spectrum. The absorption …

Picosecond optical pulse processing using a terahertz-bandwidth reconfigurable photonic integrated circuit

Picosecond optical pulse processing using a terahertz-bandwidth reconfigurable photonic integrated circuit

Chip-scale integrated optical signal processors promise to support a multitude of signal processing functions with bandwidths beyond the limit of microelectronics. Previous research has made great contributions in terms of demonstrating processing …

Metasurface holography: from fundamentals to applications

Metasurface holography: from fundamentals to applications

Holography has emerged as a vital approach to fully engineer the wavefronts of light since its invention dating back to the last century. However, the typically large pixel size, small field of view and limited space-bandwidth impose limitations in …

The future and promise of flat optics: a personal perspective

The future and promise of flat optics: a personal perspective

Metasurfaces enable the redesign of optical components into thin, planar and multifunctional elements, promising a major reduction in footprint and system complexity as well as the introduction of new optical functions. The planarity of flat optics …