Themed collection Nanoscale and Nanoscale Horizons: Nanophotonics

Raman line shapes depending on the excitation wavelength is one of the confirmations for the presence of Fano resonance in any material, but the same is often not clearly visible in low dimensional materials owing to several system-specific reasons.

In this review, the basic principles of plasmon-enhanced SHG, different methods to enhance the SHG intensity of metal nanostructures, and related applications of SHG based on metal nanostructures are introduced.

Integrating 2D van der Waals materials generates new functionalities for nanophotonic structures, like integrated waveguides, microcavities, fibers, and metasurfaces, to prototype novel optoelectronic applications with challenges and perspectives.

Current advances in photodetectors integrating waveguide and semiconductor materials, with focus on waveguide materials, waveguide types, semiconductor materials, and integrated-waveguide photodetector types.

Photoluminescence upconversion is a phenomenon involving light–matter interaction and has a broad application prospect. In this review, we summarize the mechanism of PL upconversion and ultrafast photophysical processes.

Silicon photonics is rapidly evolving as an advanced chip framework for implementing quantum technologies.

This paper presents an all-inclusive review of assembly strategies of MNWs, discusses the underlying mechanisms, assesses the developed techniques, and summarizes the representative applications in flexible and stretchable electronics.

Co-adsorbed hydroxyl species play a significant role in changing the energy landscape of the plasmon-mediated CO₂ reaction. These promote CO₂ activation and transfer of hot electrons in newly formed hybridized orbitals, thereby improving selectivity.

This manuscript presents an interesting new CdSe/CdS dot in rod morphology, termed the ‘nanonail’, produced via a controlled seeded hot injection approach.

Phenethylammonium bromide as an interlayer showed great potential to reduce trap states, balance charge carrier injection, and thus maximize the electroluminescent efficiency of quantum-dot LED.

Graphene oxide nanosheets within magnetized ferrofluids orient themselves parallel to the direction of a magnetic field, allowing for the formation of photonic liquids with reversible color changes.

In this paper, we report the use of phosphinecarboxamide as a convenient, air and moisture tolerant group-V precursor for the simple synthesis of InP-based quantum dots.

We present a novel approach of fluorescence technique for the determination of nonlinear chiroptical properties of two enentiomeric forms of nanoclusters: L- and D-Arg/ATT-AuNCs.

SPDC in a metasurface with the signal and idler photons emitted in opposite directions.

Novel yellow emissive carbon dots (CDs) with a large Stokes shift are synthesized. The CDs can be employed to fabricate high-performance large-area luminescent solar concentrators due to successful suppression of reabsorption losses.

Abnormal optical response of layered hyperbolic metamaterial with plasmonic nanoparticle arrays on top.

Scanning photocurrent microscopy is used to measure plasmon-enhanced photoresponse of single Ag nanowires and their network devices. Results presented here may enable fabrication of low-cost all-metallic photosensitive devices.

Microwave reflection photoconductive decay carrier lifetimes of Ge0.94Sn0.06 materials on oriented GaAs substrates at 300 K.

After extended aging, InAs quantum dot lasers form dislocation loops in the active region due to the coalescence of point defects. The point-defect formation process drives gradual laser degradation and is a key impediment to long-life lasers.

A meshed miniaturized frequency-selective metasurface is proposed, which has high transparency in the visible-near-infrared band as well as a microwave transmission window with a low passband loss and an insensitive incidence microwave angle.

The structure of the electronic band and density of states of InSb were theoretically calculated, and the usage of an InSb-microfiber as an ultrafast photonic device to generate Q-switched and mode-locked pulses in fiber lasers is demonstrated.

We present a secondary ligand-induced orthogonal self-assembly of atomically precise silver nanocluster building blocks into complex superstructures with enhanced emission.

Cs₂AgInCl₆ double perovskite (DP) nanocrystals (NCs) are an emerging class of materials with promising application potential in photonics/optoelectronics owing to their nontoxicity, direct bandgap, and high thermal and moisture stability.

The mode-locking operation is realized based on γ-graphyne for the first time, the vector nature of which is further studied. Additionally, an Er-doped Q-switched fiber laser with γ-graphyne as an optical switch is also firstly demonstrated.

In this work, SSPM effects of VP Ns and their reaction dynamics were studied for the first time (left). Using the superior coherence electronic nonlinearity of VP Ns, all-optical switches based on the SSPM effect (right) were prepared.

Plasmon-assisted harmonic generation in highly-doped graphene nanoribbons is strongly enhanced by the nonlocal optical response associated with large electromagnetic field gradients in closely-spaced ribbons that have optimal size and position.

The photoluminescence decay dynamics of silicon vacancy centers in a polycrystalline diamond film indicate that they are not linked with other defects of the film, thereby opening the door for their application in diamond photonics or sensing.

Copper-based hybrid organic–inorganic perovskites with chiral amines, (R-NEA)₂CuCl₄ (NEA = 1-naphthylethylamine) and (R-CYHEA)₆Cu₃Cl₁₂, show second harmonic generation.

Longitudinal electromagnetic fields produced by strongly focused Laguerre-Gaussian and Bessel optical vortices are responsible for novel optical chirality of structured light at the nanoscale.

Large-scale coupling of nanodiamonds hosting NV centers to silicon dimer nanoantennas was achieved by AFM nanoxerography. This controlled process, yielding configurations down to a single deposited quantum emitter, leads to their enhanced brightness.