Light manipulation with encoded plasmonic nanostructures

Abstract

-Plasmonics, which allows for manipulation of light field beyond the fundamental diffraction limit, has recently attracted tremendous research efforts. The propagating surface plasmon polaritons (SPPs) confined on a metal-dielectric interface provide an ideal two-dimensional (2D) platform to develop subwavelength optical circuits for on-chip information processing and communication. The surface plasmon resonance of rationally designed metallic nanostructures, on the other hand, enables pronounced phase and polarization modulation for light beams travelling in three-dimensional (3D) free space. Flexible 2D and free-space propagating light manipulation can be achieved by encoding plasmonic nanostructures on a 2D surface, promising the design, fabrication and integration of the nextgeneration optical architectures with substantially reduced footprint. It is envisioned that the encoded plasmonic nanostructures can significantly expand available toolboxes for novel light manipulation. In this review, we presents the fundamentals, recent developments and future perspectives in this emerging field, aiming to open up new avenues to developing revolutionary photonic devices.

Near‐Field Optical Properties of Fully Alloyed Noble Metal Nanoparticles

“…[12][13][14][15] Thus, metallic nanostructures composed of Ag-Au can enable the rational design of building blocks for different applications, such as metamaterials, [16,17] hot carrier devices, [18] light absorption improvement in photovoltaics, [19,20] colored glasses, [21] displays, [22,23] and catalysis. Alloying of these noble metals has been applied to tune the material dielectric function, where the LSPR can be modulated progressively from the UV (pure Ag) to the NIR (pure Au).…”

“…Alloying of these noble metals has been applied to tune the material dielectric function, where the LSPR can be modulated progressively from the UV (pure Ag) to the NIR (pure Au). [12][13][14][15] Thus, metallic nanostructures composed of Ag-Au can enable the rational design of building blocks for different applications, such as metamaterials, [16,17] hot carrier devices, [18] light absorption improvement in photovoltaics, [19,20] colored glasses, [21] displays, [22,23] and catalysis. [24] To date, different fabrication techniques have been successfully utilized to realize Ag x Au 1−x alloyed NPs.…”

Signal manipulation through horn antennas loaded with metamaterial-inspired particles: A review

“…Artificial electromagnetic materials, metamaterials, and metasurfaces have revolutionized the design of microwave and optical components, allowing to obtain better performances with respect to conventional solutions [1][2][3][4][5][6][7][8] or novel functionalities [9][10][11][12][13][14]. In particular, in the last years, there was a strong interest in the use of metamaterials for performing the manipulation of the electromagnetic waves.…”

Plasmonic metalens based on coupled resonators for focusing of surface plasmons

“…This renders SPs very attractive in developing next-generation, ultra-compact, ultra-fast integrated plasmonic circuitry in which light and electric signals can be transferred and processed simultaneously234. In the last decade, with the development of subwavelength optics and fabrication technologies, manipulating SPs by artificial structured surfaces (metasurfaces) has garnered a lot of attention567. For instance, a series of SP-based applications have been demonstrated by metasurfaces, including SP metalenses891011, unidirectional launchers12131415, wavelength demultiplexers1617181920, special SP beams2122232425 and SPs wavefront engineering26.…”