An approach to emerging optical and optoelectronic applications based on NiO micro- and nanostructures
Nickel oxide (NiO) is one of the very few p-type semiconducting oxides, the study of which is gaining increasing attention in recent years due to its potential applicability in many emerging fields of technological research. Actually, a growing number of …
Progress toward blue-emitting (460–475 nm) nanomaterials in display applications
Recently, quantum dots (QD) and quantum rods (QRs) have become extremely popular in displays and lighting applications. Liquid crystal displays (LCDs) equipped with quantum dot enhancement films (QDEFs) offer extended color saturation, increasing said …
Harmonic generation with multi-layer dielectric metasurfaces
Metasurfaces have recently gained extensive interest because of their extraordinary optical behavior as artificial material interfaces with ultrahigh compactness. In this framework, dielectric platforms have newly become very promising for nonlinear …
High-efficiency and water-quenching-resistant Tb3+-based nanoparticles for single-particle imaging
The structure of the host lattice has a substantial influence on the optical properties of lanthanide-doped luminescent materials. Hexagonal-phase (?-phase) NaREF4 (RE = rare earth) is the most commonly used crystal structure for lanthanide-doped …
Topological guided-mode resonances at non-Hermitian nanophotonic interfaces
The topological properties of photonic microstructures are of great interest because of their experimental feasibility for fundamental study and potential applications. Here, we show that robust guided-mode-resonance states exist in photonic domain-wall …
Suspended silicon waveguide platform with subwavelength grating metamaterial cladding for long-wave infrared sensing applications
Long-wave infrared (LWIR, 6–14 µm) processes enormous potential for chem/biosensing as it covers abundant molecular absorption fingerprints. Waveguides provide an attractive chip-scale miniaturization solution for optical sensors. However, the exploration …
Enhanced second-harmonic generation in monolayer MoS2 on suspended metallic nanostructures by plasmonic resonances
Monolayer transition metal dichalcogenides (TMDs) possess large second-order nonlinear responses due to the broken inversion symmetry, which can extend their intriguing applications in nonlinear nanophotonics and optoelectronics. However, the atomic thickness …
Driving plasmonic nanoantennas at perfect impedance matching using generalized coherent perfect absorption
Coherent perfect absorption (CPA) describes the absence of all outgoing modes from a lossy resonator, driven by lossless incoming modes. Here, we show that for nanoresonators that also exhibit radiative losses, e.g., plasmonic nanoantennas, a generalized …
Nanosecond-order long–short fluorescence lifetime switchable encryption with enlarged coding capacity
The turn-off fluorescent photoswitches for information encryption are constantly being developed. However, there are no reports about time-switchable (fluorescence lifetime-switchable) encryption to overcome the limitations of tunable encoding numbers in …
Cooperative optical wavefront engineering with atomic arrays
Natural materials typically interact weakly with the magnetic component of light which greatly limits their applications. This has led to the development of artificial metamaterials and metasurfaces. However, natural atoms, where only electric dipole …
Plasmonic hot-electron photodetection with quasi-bound states in the continuum and guided resonances
Hot electrons generated in metallic nanostructures have shown promising perspectives for photodetection. This has prompted efforts to enhance the absorption of photons by metals. However, most strategies require fine-tuning of the geometric parameters to …
Difference-frequency generation in optically poled silicon nitride waveguides
Difference-frequency generation (DFG) is elemental for nonlinear parametric processes such as optical parametric oscillation and is instrumental for generating coherent light at long wavelengths, especially in the middle infrared. Second-order nonlinear …
Three-dimensional plasmonic nano-router via optical antennas
A three-dimensional (3D) nanoscale optical router is a much-desired component in 3D stacked optical integrated circuits. However, existing 3D routers based on dielectric configurations suffer from large footprints and nanoscale routers based on plasmonic …