Applied Physics Letters
Articles in this Issue
Extended T2 times of shallow implanted NV in chemically mechanically polished diamond
Mechanical polishing of diamond is known to be detrimental to the spin coherence time and strain environment of near-surface defects via intrinsic introduction of subsurface damage: this damage is typ...
Landau levels induced by synthetic strain in plasmonic metasurface
The quantum Hall effect arises when electrons in a two-dimensional plane are subjected to a magnetic field, causing them to undergo cyclotron motion and form discrete energy levels, known as Landau le...
High resolution multicolor holograms encoded into color print images with hybrid dielectric/plasmonic metasurfaces
Multicolor holograms encoded into color print images are structures that generate holographic images when illuminated with lasers, while showing completely different images when viewed with the eye or...
Color astrophotography with a 100 mm-diameter f/2 polymer flat lens
We demonstrate a 100 mm-diameter, 2.4 μm-thick multilevel diffractive lens (MDL) with a 200 mm focal length, optimized for the 400 to 800 nm wavelength range—specifications that are difficult to achie...
Laser-induced thermal size effects in micro-Raman thermal conductivity measurements
Thermal conductivity measurements of submicrometer structures are at the core of the efficient power design of semiconductor devices. Micro-Raman spectroscopy measures thermal conductivity in a fast,...
Raman signal enhancement via a micro-ring resonator
This study presents the use of micro-ring resonator (MRR) devices to extract and enhance nonlinear signals. MRRs “trap” incoming light and, therefore, have been shown to achieve extremely high local i...
Accurate and real-time acoustic holography using super-resolution and physics combined deep learning
Acoustic holography is a promising technique for contactless manipulation, remote sensing, and energy harvesting. It involves retrieving holograms used to modulate acoustic sources for reconstructing...
Homogeneous linewidth behavior of narrow optical emitters at sub-kelvin temperatures
We explore the properties of ultranarrow spectral holes in ensembles of solid-state emitters in crystals over a range of sub-kelvin temperatures, as a new step toward leveraging their exceptional cohe...
Stearic acid/CNT-wrapped superhydrophobic/oleophilic sponge with Joule-heating effect for efficient removal of crude oil
Crude oil spill accidents cause extreme environmental damage, with huge economic costs that include the loss of oil resources. Despite the advances in conventional oil spill cleanup technology, such a...
Tunable mode-locked laser in the 2.0–2.6 <b> <i>μ</i> </b>m range with GHz-level spectral width and sub-nanosecond pulse duration
Mode-locked lasers with narrow spectral bandwidths and high power spectral density are valuable for various applications that require selective and efficient light–matter interactions. However, mode-l...
High-Q silicon two-dimensional photonic crystal slot nanocavities with asymmetric low-index claddings
Photonic crystal nanocavities with high quality (Q) factors find extensive application in silicon (Si)-integrated photonics owing to their highly selective wavelength filtering, optical buffering, and...
Facile synthesis of vanadium oxide thin films by atomic layer deposition and post-annealing
We report the facile synthesis of vanadium oxide (VOx) thin films on sapphire substrates by atomic layer deposition (ALD) and post-annealing. Amorphous VOx thin films are grown by ALD employing tetrak...
Optical anisotropy in WS2/ReS2 heterostructure with one-dimensional moiré pattern
Two-dimensional (2D) materials with low symmetry have garnered considerable attention due to their anisotropic electrical and optical properties, demonstrating great potential in various fields. Recen...
Pressure-tuned biexciton emission in CH3NH3PbBr3 perovskite quantum dots
Pressure-induced evolution of the bandgap, structural phase transitions, and changes in exciton effects can significantly modulate the luminescent properties of lead halide perovskites (LHPs) quantum...
Superionic conduit of alkaline earth metals confined by two-dimensional boron–carbon layers
Superionic conductors feature fast super-ion diffusion in the solid-state framework, making them ideal materials for safe, high-performing electrolytes. It is, therefore, in hot pursuit of seeking sol...
Regulation of intermolecular interaction energies for improving polarization-sensitive photodetection
In this study, we systematically modified the polymer structure by incorporating non-conjugated units and substituting atoms in the fused-ring core, resulting in significant alterations to intermolecu...
Buried Au nanoparticles-assisted enhancement of local electric field toward improved resistance switching in Au/ZnO/Si structures
In this work, we reported the fabrication of improved Au/ZnO/Si resistance switching (RS) devices achieved by introducing buried cone-like Au nanoparticles (NPs). The Au NPs were facilely obtained by...
Heat transfer characteristics of a flat plate pulsating heat pipe with microstructures for unidirectional thermal-to-mechanical energy conversion
The phase change of a liquid into vapor results in a sharp volume expansion, generating a powerful driving force, which is fundamental for the operation of pulsating heat pipes (PHPs). However, the pe...
Efficient room-temperature spin-amplified luminescence of an InAs quantum dot tunnel coupled with a thin GaNAs spin filter
Dilute nitride GaNAs has attracted much attention for spin generation owing to its defect-engineered spin filtering at room temperature. Strong, circularly polarized luminescence reflecting the spin-p...
Engineering mechanical resonances of magnetoelectric transducers
Magnetoelectric transducers are being investigated as a promising alternative for wireless power transfer in cases where small device size and/or low operation frequency are desired. To maximize the o...
Spin glass and complex magnetism in a high-entropy spinel oxide with five cations at both tetrahedral and octahedral sites
We report the stabilization and investigation of a hitherto unexplored high-entropy spinel oxide with the composition (Mg0.2Co0.2Ni0.2Cu0.2Zn0.2)(Cr0.4Mn0.4Fe0.4Al0.4Ga0.4)O4, representing the spinel...
A simple method to find temporal overlap between THz and x-ray pulses using x-ray-induced carrier dynamics in semiconductors
X-ray-induced carrier dynamics in silicon and gallium arsenide were investigated through intensity variations of transmitted terahertz (THz) pulses in the pico- to microsecond timescale with x-ray fre...
Perspective on phase change composites in high-efficiency solar-thermal energy storage
To clarify future research directions, this study first analyzes the heat transfer process of solar-thermal conversion and then reviews solar-thermal phase change composites for high-efficiency harnes...
Coupling and propagation of strong-field THz waves on tungsten wires
Free-space strong-field terahertz (THz) radiation has significant applications in non-equilibrium quantum matter modulation, all-optical electron acceleration and manipulation, THz biomedical effects,...
Sputter epitaxy of ScAlN films on GaN high electron mobility transistor structures
ScAlN has emerged as a promising material for GaN-based high electron mobility transistors (HEMTs) due to its unique piezoelectric and ferroelectric properties, which can significantly enhance electro...