Applied Physics Letters
Articles in this Issue
Wavelength-dependent C8-BTBT/C60 heterojunction transistor array for optical communication and image recognition functions
Organic optoelectronic transistors are promising for artificial vision systems, thanks to their excellent optical properties and facile processability. However, low charge transport efficiency and nar...
Efficient sub-bandgap excitation in near-infrared luminescence of modulation-doped InAs quantum dot system
This study investigates highly efficient sub-bandgap excitation and roles of donor–acceptor (D–A) pairs in Si modulation-doped InAs/GaAs quantum dot (QD) systems with low-temperature variable-excitati...
Temperature effect on the dispersion of spin waves in the ferromagnetic thin film with Dzyaloshinskii–Moriya interaction
Ferromagnetic thin films are one of the promising platforms for developing spintronic devices due to the multi-field-controlled diverse dynamic behaviors of spin waves and magnetization topologies lik...
Fabrication of fully suspended Hall crosses in GaAs/AlGaAs heterostructures and scaling of submicron AuGeNi ohmic contacts
In this work, we demonstrate the fabrication of a device to investigate electron–phonon coupling in quantum systems on a suspended island, together with a systematic study of submicrometer AuGeNi ohmi...
A topologically engineered honeycomb-like (2-0)-2 piezoceramic composite ultrasonic transducer with superior sensitivity
Piezoelectric ultrasonic transducers (PUTs) are widely utilized across a variety of technological fields; however, further advancement in ultrasonic transducer performance faces fundamental limitation...
Ultra-long-life zinc-iodine batteries enabled by efficient conversion of iodine on high-spin Fe single-atom sites embedded into 3D porous graphene
The practical application of aqueous zinc-iodine batteries as promising low-cost and large-scale energy storage devices is still hindered by the polyiodide shuttle effect and sluggish iodine redox kin...
Electrochemical hydrogen pumps powered by <i>in situ</i> waste heat recovery and enhanced by 3D MXene-CNT carriers
Electrochemical hydrogen pump (EHP) technology is promising for purifying industrial by-product hydrogen (IBH), but low cost and high efficiency are key for practical use. This study recovers low-temp...
Multijunction photovoltaic fibers with record efficiency for energy-harvesting textiles
Multijunction (MJ) photovoltaics offer the highest demonstrated solar power conversion efficiencies but have not been previously integrated into deformable textile architectures. Here, we demonstrate...
Tailoring arbitrary convex self-bending and low-diffraction elastic waves via deep-subwavelength metasurfaces
Precise control over elastic wave propagation paths, particularly for complex trajectories with preserved beam integrity, remains a significant challenge in various applications. Here, we present a de...
Rubidium copper iodide single crystals for deep-ultraviolet detection and imaging
Deep-ultraviolet (DUV) detectors are indispensable for a wide range of applications, including environmental monitoring, flame warning, and intelligent imaging systems. However, the development of DUV...
Dual-tunable polarity reversal of exchange bias in the Fe3GaTe2/O-Fe3GaTe2 heterostructures
The polarity reversal of exchange bias (EB) in two-dimensional (2D) van der Waals magnets remains a significant scientific challenge, yet is highly desirable for advanced spintronic applications. Conv...
Alleviating the trade-off between thermal stability and fast switching in Ru-doped Sb3Te phase change films
Phase change memory is a promising candidate for next-generation nonvolatile memory. Improving the amorphous thermal stability of phase-change materials usually comes at the expense of crystallization...
Bloch oscillations in a semiconductor superlattice shifting from capacitive to conductive responses with electric-field-induced interminiband mixing
We investigate the initial phase of Bloch oscillations in a GaAs-based superlattice designed for fine bias control of interminiband mixing. The type of oscillation current, determined from terahertz e...
Defect-engineering induced sub-bandgap stimulation in BeZnO for optoelectronic synapse
Optoelectronic synaptic devices offer a promising way to overcome the traditional von Neumann bottleneck, while most studies focused on above-bandgap photons but overlooked sub-bandgap stimulation. In...
Mechanically driven piezocatalytic wastewater-to-hydrogen conversion in two-dimensional SnSe nanosheets
Piezocatalysis is an emerging mechano-to-chemistry energy conversion technique that uses mechanically generated positive and negative charges to drive chemical reactions, opening broad opportunities i...
Measuring carrier lifetimes of an InGaAs/GaAsSb T2SL using an optical phase-shift technique
An optical phase-shift technique is demonstrated to measure the carrier lifetime of an InGaAs/GaAsSb type-II superlattice as a function of excess carrier density, showing good agreement with time-reso...
Interlayer coupling driven by polarization and stacking: A mechanism for tailoring optoelectronic properties in CuInP2S6/AsSBr heterostructures
Two-dimensional (2D) van der Waals (vdW) ferroelectric heterostructures serve as an ideal platform for tunable optoelectronic devices, yet the precise regulation mechanism of interlayer coupling on th...
Observation of suppression of Anderson localization of light
In a disordered-medium, light can be localized in the spaces between scattering sites, which represents the optical mean free path (MFP). However, the fundamental question of the smallest MFP that can...
Volatile and nonvolatile resistive switching reconfiguration in CeO2-based memristor
The era of big data and the rapid development of artificial intelligence pose urgent demand on reconfigurability of memristive devices. Here, we demonstrate that a Pt/CeO2/V memristor can exhibit both...
Composition-dependent ferroelectricity in epitaxial AlYN
We report molecular beam epitaxy and ferroelectric properties of Al1-xYxN thin films with Y composition up to x = 41%. Structural characterization reveals that a wurtzite lattice structure is well pre...
Recorded 1.4 kV/1.24 GW/cm2 BFOM AlGaN/GaN Schottky barrier diodes grown on Si substrate with fan-shaped AlGaN polarization superjunction
In this work, AlGaN/GaN Schottky barrier diodes on silicon (Si) substrates are proposed and fabricated. The proposed devices feature fan-shaped AlGaN polarization field plates (FPs) with a gradient de...
Revealing and optimizing coherence-driven trade-offs in partially coherent differential imaging
Optical analog computing under partially coherent illumination offers a promising route toward high-speed, low-noise, and interference-robust information processing. However, the role of spatial coher...
Physics-constrained autofocus in fiber-coupled single-pixel microscopy
Most existing reconstruction-free autofocus methods in single-pixel imaging (SPI) are designed for global focus assessment, whereas many applications require target-selective focusing on designated ta...
Light harvesting and carrier separation in N-doped graphene clusters/Si heterojunctions for photodetection and spatial image recognition
Two-dimensional (2D) graphene photodetectors have limited light absorption, short carrier lifetimes, and a dependence on external bias, which hinder sensitivity and power efficiency. This study presen...
Single-sided magnetic-field generation based on transformation optics with a multilayer coil structure
We propose a transformation-optics-based method for generating a single-sided time-varying magnetic field. In this method, an inhomogeneous anisotropic medium exhibiting a spatially asymmetric respons...