Applied Physics Letters
Articles in this Issue
Enhanced athermal phonon responsivity in a kinetic inductance detector with integrated phonon collectors
Cryogenic phonon detectors are adopted in light dark matter searches and coherent elastic neutrino-nucleus scattering experiments as they can achieve low energy thresholds. The phonon-mediated sensing...
Enhanced thermo-optic tuning micro-ring resonator on silicon nitride platform
The rapid growth of integrated photonics for optical computing, LiDAR, and quantum information processing has established silicon nitride (SiN) as a leading platform due to its ultra-low optical loss...
Enhanced thermoelectric properties of AgBi3S5 through grain boundary and band engineering via Te alloying and Cd doping
AgBi3S5-based thermoelectric materials, characterized by their unique monoclinic crystal structure, exhibit intrinsically low lattice thermal conductivity. The presence of earth-friendly elements furt...
High-efficiency narrowband terahertz generation in novel wide-bandgap barium chalcogenide crystals
We report an extensive experimental investigation of novel barium chalcogenides (BaGa4Se7, BaGa2GeSe6, and BaGa2GeS6) for the generation of strong narrowband terahertz (THz) radiation. These Ba-contai...
Terahertz-wave generation via difference-frequency mixing from resonant above-barrier states in weakly strained InGaAs/GaAs multiple quantum wells
Asymmetric electronic states are essential for generating second-order optical nonlinearity, which enables terahertz-wave generation via difference-frequency mixing. While surface electric fields are...
MEMS-metasurface integration for light scanning and 3D LiDAR imaging
LiDAR (Light Detection and Ranging) is a critical imaging technology providing quantitative three-dimensional information to autonomous vehicles and robotic systems. Here, we demonstrate a compact, lo...
Ultralow-loss and high-modulation depth terahertz amplitude modulation enabled by coupled-resonant structures
Efficient amplitude modulation of terahertz (THz) waves is essential for high-speed communication systems. However, the long-standing trade-off between low insertion loss (IL) and high-modulation dept...
Enhanced stimulated four-wave mixing in a bipartite silicon resonator for phase mismatch switching
Four-wave mixing (FWM) in integrated photonic platforms requires phase matching, which typically limits the bandwidth and conversion efficiency. In this work, we experimentally demonstrate, for the fi...
Spectrally tailored and polarimetric shortwave infrared detection with narrowband response via quasi-BIC enhanced third harmonic generation
Shortwave infrared (SWIR) detectors offer excellent penetration capabilities, making them highly valuable for applications such as target recognition and optical communication. However, traditional SW...
Dynamic control of polarization states with barium titanate integrated photonic devices
We demonstrate continuous control of polarization from a two-dimensional grating outcoupler of a modified Mach–Zehnder interferometer, fabricated in barium titanate grown on a silicon substrate. The p...
Dual Zr–N co-doping endowing 3D Li-ion transport and enhanced Li-ion concentration in UCl3-type chloride electrolytes
Halide solid electrolytes are attractive candidates for all-solid-state batteries owing to their favorable ionic conductivity, high oxidation stability, and superior mechanical deformability. However,...
Spectral diffusion and indistinguishability in electrically injected silicon T centers
The integration of spin-photon interfaces into standard silicon electronics remains the elusive keystone for a scalable quantum internet. While T centers in silicon emerge as luminous candidates for t...
Frequency division multiplexed dual-band infrared phototransistors for absolute temperature sensing
High-performance multispectral infrared photodetectors are essential for advanced imaging and sensing technologies. Here, we demonstrate a frequency division multiplexed (FDM) dual-band infrared photo...
Temperature- and light-driven crossover behavior in quantum Hall scaling of a wide HgTe quantum well
HgTe quantum wells (QWs) with inverted band structures and strong spin–orbit coupling provide a versatile platform for studying topological quantum transport. Quantum Hall scaling near plateau–plateau...
Hard particle effects on frictional heating of PBX surrogates characterized by high spatiotemporal resolution
A tiny hot spot can start a devastating explosion. Among potential mechanical stimuli such as drop, impact, and puncture, localized frictional heating is regarded as one of the most probable, especial...
Vapor sorption-based critical dimension metrology for uniaxial anisotropic nanopatterns
A major challenge in modern semiconductor, photonic, and quantum technology is the accurate characterization of ultrathin (<100 nm) patterns with ever-decreasing lateral feature sizes (<...
Linkage between tailored crystalline morphology and charge transport in LDPE: Insights from fractions
High-voltage direct-current (HVDC) power cables predominantly rely on cross-linked polyethylene as the key insulating material, and the performance is determined by the properties of low-density polye...
Enhanced electronic transport and near-infrared photodetection in multilayer Bi-doped InSe
Two-dimensional (2D) indium selenide (InSe) is a promising semiconductor for next-generation electronic and near-infrared (NIR) photonic devices. However, its practical performance is constrained by l...
Multifunctional triboelectric nanogenerator based on SCASN:Eu phosphor for integrated energy harvesting and photoelectric conversion
Triboelectric nanogenerators (TENGs) offer an effective solution for harvesting mechanical energy for distributed electronic devices; however, their functional singularity limits application in multi-...
Strain and ferroelectric polarization tune magnetic phase transition and anomalous Hall effect in Ti2Se2S/PbTe heterostructure with Rashba effect
Altermagnets have attracted considerable attention for uniting the advantages of ferromagnets and antiferromagnets and for their promise in advancing spintronics. However, investigations focused on tu...
Large orbital torque with concurrent mitigation of magnetic damping in titanium/rare-earth lutetium metallic heterostructures
Improving the spin–orbit torque efficiency is essential for achieving high-performance and low-power spintronic devices. However, enhancing torque efficiency inevitably intensifies spin pumping, which...
Strain-driven topological phase transition between anomalous valley Hall and quantum anomalous Hall states in hexagonal ferromagnets
The anomalous valley Hall (AVH) effect, characterized by a polarized valley degree of freedom, provides a route toward a valley-dependent quantum anomalous Hall (QAH) state. Yet, realizing both in one...
Strain transition and mosaicity evolution in m-plane non-polar <b> <i>α</i> </b> -Ga2O3 heteroepitaxy
The heteroepitaxy of α-phase gallium oxide (α-Ga2O3) is fundamentally limited by its metastability and the strong coupling between strain relaxation and phase transformation. Here, non-polar α-Ga2O3 f...
Electronic origins of p-type transparent conductivity in SrCu2O2
SrCu2O2 retains the p-type conductivity of Cu2O while exhibiting a pronounced upward shift of the conduction band minimum (CBM), enhancing visible-light transparency. This CBM upshift is commonly attr...
Phonon-assisted light absorption and emission in cubic boron nitride
Cubic boron nitride (cBN) is a wide-bandgap polymorph of boron nitride whose optical response remains only partially understood due to the coexistence of indirect electronic transitions and strong exc...