Super-resolution optical microscopy using cylindrical vector beams
Super-resolution optical microscopy, which gives access to finer details of objects, is highly desired for fields of nanomaterial, nanobiology, nanophotonics, etc. Many efforts, including tip optimization and illumination optimization etc., have been made in …
Multi-moded high-index contrast optical waveguide for super-contrast high-resolution label-free microscopy
The article elucidates the physical mechanism behind the generation of superior-contrast and high-resolution label-free images using an optical waveguide. Imaging is realized by employing a high index contrast multi-moded waveguide as a partially coherent …
Resonant multilevel optical switching with phase change material GST
We demonstrate a multilevel optical memristive switch based on a silicon Fabry–Perot resonator. The resonator is constructed by a pair of waveguide Bragg gratings at the ends of a multimode interferometer (MMI) covered with sub-micrometer-size Ge2Sb2Te5 …
Geometry-dependent skin effects in reciprocal photonic crystals
Skin effect that all eigenmodes within a frequency range become edge states is dictated by the topological properties of complex eigenvalues unique in non-Hermitian systems. The prevailing attempts to realize such a fascinating effect are confined to either …
Steering coherence in quantum dots by carriers injection via tunneling
Coherent control is a key experimental technique for quantum optics and quantum information processing. We demonstrate a new degree of freedom in coherent control of semiconductor quantum dot (QD) ensembles operating at room temperature using the tunneling …
Nonlinear localized modes in one-dimensional nanoscale dark-state optical lattices
Optical lattices (OLs) with conventional spatial periodic lambda/2, formed by interfering the counterpropagating laser beams with wavelength lambda, are versatile tools to study the dynamical and static properties of ultracold atoms. OLs with subwavelength …
Chirality-modulated photonic spin Hall effect in PT-symmetry
The photonic spin Hall effect (PSHE), featured by a spin-dependent shift driven by its polarization handedness, is proposed to facilitate the applications in precision metrology and quantum information processing. Here, due to the magnetoelectric coupling of …
Infrared nanoplasmonic properties of hyperdoped embedded Si nanocrystals in the few electrons regime
Using localized surface plasmon resonance (LSPR) as an optical probe we demonstrate the presence of free carriers in phosphorus doped silicon nanocrystals (SiNCs) embedded in a silica matrix. In small SiNCs, with radius ranging from 2.6 to 5.5 nm, the …
Edge states in plasmonic meta-arrays
Photonic edge states provide a novel platform to control and enhance light–matter interactions. Recently, it becomes increasing popular to generate such localized states using the bulk-edge correspondence of topological photonic crystals. While the …
Surface-wave coupling in double Floquet sheets supporting phased temporal Wood anomalies
We investigate symmetry-selective surface-mode excitation in a general periodically time-modulated double-layer system, where the modulation of the two layers has a constant phase difference. By deriving a semi-analytic transfer matrix formalism of a …
Ultrahigh-performance vector magnetic field sensor with wedge-shaped fiber tip based on surface plasmon resonance and magnetic fluid
A novel fiber-optic vector magnetic field sensor and its sensing quality dependent of fabrication method has been proposed and investigated. The proposed sensor has two surfaces on the tip of a multimode fiber, which is used as the sensing probe. By plating …