Interdisciplinary nanophotonics
This special issue “Interdisciplinary Nanophotonics” holds a collection of invited and selected research and review papers on topics that were presented at the fourth edition of the “NANOP 2019: Functional Nanophotonics” conference in Munich. …
Advances in exploiting the degrees of freedom in nanostructured metasurface design: from 1 to 3 to more
The unusual electromagnetic responses of nanostructured metasurfaces endow them with an ability to manipulate the four fundamental properties (amplitude, phase, polarization, and frequency) of lightwave at the subwavelength scale. Based on this, in the past …
On-chip nanophotonics and future challenges
On-chip nanophotonic devices are a class of devices capable of controlling light on a chip to realize performance advantages over ordinary building blocks of integrated photonics. These ultra-fast and low-power nanoscale optoelectronic devices are aimed at …
All-dielectric metasurfaces for polarization manipulation: principles and emerging applications
Metasurfaces, composed of specifically designed subwavelength units in a two-dimensional plane, offer a new paradigm to design ultracompact optical elements that show great potentials for miniaturizing optical systems. In the past few decades, metasurfaces …
Nonlinear nanophotonic devices in the ultraviolet to visible wavelength range
Although the first lasers invented operated in the visible, the first on-chip devices were optimized for near-infrared (IR) performance driven by demand in telecommunications. However, as the applications of integrated photonics has broadened, the wavelength …
Active plasmonic nanoantenna: an emerging toolbox from photonics to neuroscience
Concepts adapted from radio frequency devices have brought forth subwavelength scale optical nanoantenna, enabling light localization below the diffraction limit. Beyond enhanced light–matter interactions, plasmonic nanostructures conjugated with active …
Simply synthesized nitrogen-doped graphene quantum dot (NGQD)-modified electrode for the ultrasensitive photoelectrochemical detection of dopamine
Recently, nitrogen-doped graphene quantum dots (NGQDs), as a new type of quantum semiconductor and photoelectrochemical material, are promising candidates in photoelectric sensing, water splitting, and biological imaging and have various potential application …
Design and optimization of tunneling photodetectors based on graphene/Al2O3/silicon heterostructures
Recent discoveries in the field of graphene-based heterostructures have led to the demonstration of high-performance photodetectors. However, the studies to date have been largely limited to the heterojunction with a Schottky barrier, restricted by an …
Self-induced thermo-optical effects in silicon and germanium dielectric nanoresonators
Dielectric nanoresonators uniquely support both magnetic and electric resonances across a wide wavelength range. They are thus being exploited in a growing number of groundbreaking applications. In particular, they have been recently suggested as promising …
Plasmon-controlled, ultra-bright, excitation-polarization-independent photoluminescence from individual Ag nanoplates
Fluorescent metallic nanoparticles with high quantum yield are highly desirable for optical imaging in the fields of biology and materials science. We investigate the photoluminescence (PL) properties of Ag nanoplates, particularly triangular ones, …
Passively Q-switched Yb-doped all-fiber laser based on Ag nanoplates as saturable absorber
We report on a Q-switched Yb-doped all-fiber laser based on a solution-processed Ag nanoplates saturable absorber. Optical deposition procedure is implemented to transfer the Ag nanoplates onto the fiber core area through the thermal effect. The saturable …
Stacking angle dependent multiple excitonic resonances in bilayer tungsten diselenide
We report on multiple excitonic resonances in bilayer tungsten diselenide (BL-WSe2) stacked at different angles and demonstrate the use of the stacking angle to control the occurrence of these excitations. BL-WSe2 with different stacking angles were …
Optically and radio frequency (RF) transparent meta-glass
We propose a radio frequency (RF) and visibly transparent composite metasurface design comprising newly developed transparent multilayer conductive coatings. Detailed experimental and theoretical analysis of the RF/visible transparency of the proposed …
Critical review of quantum plasmonic models for finite-size media
We provide a critical analysis of some of the commonly used theoretical models to describe quantum plasmons in finite size media. We summarize the standard approach based on a Fano diagonalization and we show explicit discrepancies in the obtained results by …
Tunable plasmon-phonon polaritons in anisotropic 2D materials on hexagonal boron nitride
Mid-infrared (MIR) plasmon-phonon features of heterostructures composing of a plasmonic anisotropic two-dimensional material (A2DM) on a hexagonal boron nitride (hBN) film are analyzed. We derive the exact dispersion relations of plasmon-phonons supported by …
Pixeled metasurface for multiwavelength detection of vitamin D
The steadily increasing demand for accurate analysis of vitamin D level, via measurement of its best general marker, 25-hydroxyvitamin D (25(OH)D), pushes for the development of novel automated assays capable of working at very low concentrations. Here, we …
Phase-controlled metasurface design via optimized genetic algorithm
In an optical Pancharatnam-Berry (PB) phase metasurface, each sub-wavelength dielectric structure of varied spatial orientation can be treated as a point source with the same amplitude yet varied relative phase. In this work, we introduce an optimized genetic …
Superlattice nonlinearities for Gigahertz-Terahertz generation in harmonic multipliers
Semiconductor superlattices are strongly nonlinear media offering several technological challenges associated with the generation of high-frequency Gigahertz radiation and very effective frequency multiplication up to several Terahertzs. However, charge …
Multipolar second-harmonic generation from high-Q quasi-BIC states in subwavelength resonators
We put forward the multipolar model which captures the physics behind linear and nonlinear response driven by high-quality (high-Q) supercavity modes in subwavelength particles. We show that the formation of such trapped states associated with bound states in …
Lasing at the nanoscale: coherent emission of surface plasmons by an electrically driven nanolaser
Plasmonics offers a unique opportunity to break the diffraction limit of light and bring photonic devices to the nanoscale. As the most prominent example, an integrated nanolaser is a key to truly nanoscale photonic circuits required for optical …
Perovskite nanowire lasers on low-refractive-index conductive substrate for high-Q and low-threshold operation
Over the last five years, inorganic lead halide perovskite nanowires have emerged as prospective candidates to supersede standard semiconductor analogs in advanced photonic designs and optoelectronic devices. In particular, CsPbX3 (X = Cl, Br, I) perovskite …
A simple transfer-matrix model for metasurface multilayer systems
In this work we present a simple transfer-matrix based modeling tool for arbitrarily layered stacks of resonant plasmonic metasurfaces interspersed with dielectric and metallic multilayers. We present the application of this model by analyzing three seminal …
Enhanced two-photon photoluminescence assisted by multi-resonant characteristics of a gold nanocylinder
Multi-resonant plasmonic simple geometries like nanocylinders and nanorods are highly interesting for two-photon photoluminescence and second harmonic generation applications, due to their easy fabrication and reproducibility in comparison with complex …
Nanoscale control of single molecule Förster resonance energy transfer by a scanning photonic nanoantenna
Förster Resonance Energy Transfer (FRET) is a widely applied technique in biology to accurately measure intra- and inter-molecular interactions at the nanometre scale. FRET is based on near-field energy transfer from an excited donor to a ground state …
Magnetic switching of Kerker scattering in spherical microresonators
Magneto-optical materials have become a key tool in functional nanophotonics, mainly due to their ability to offer active tuning between two different operational states in subwavelength structures. In the long-wavelength limit, such states may be considered …
High-efficiency, large-area lattice light-sheet generation by dielectric metasurfaces
Lattice light-sheet microscopy (LLSM) was developed for long-term live-cell imaging with ultra-fine three-dimensional (3D) spatial resolution, high temporal resolution, and low photo-toxicity by illuminating the sample with a thin lattice-like light-sheet. …