Applied Physics Letters
Articles in this Issue
Microwave-optical double-resonance vector magnetometry with warm Rb atoms
Atomic systems offer opportunities for noninvasive, accurate vector magnetometers that operate at ambient temperature and are conducive to miniaturization. Here, we demonstrate an unshielded three-axi...
Two-stage dynamics of droplet oscillation under alternating-current electrowetting-on-dielectric
The canonical view in alternating-current electrowetting-on-dielectric (AC EWOD) holds that droplets oscillate at twice the driving frequency (the frequency of the applied voltage). Here, we show that...
Surface morphology evolution in argon ion-beam polishing of barium titanate thin films
Barium titanate (BaTiO3, BTO) is a promising material for integrated photonics, but surface roughness introduced during thin-film growth degrades optical performance. An argon (Ar) ion-beam polishing...
Device variability of Josephson junctions induced by interface roughness
As quantum processors scale to large qubit numbers, device-to-device variability emerges as a critical challenge. Superconducting qubits are commonly realized using Al/AlOx/Al Josephson junctions oper...
Electrical properties of Nb/Au Schottky contacts on p-GaN:Mg enabling high-performance rectification and trap-depleted barrier landscape
This Letter introduces a novel Nb/Au metallic system toward the realization of high-performance Schottky contacts on p-type GaN:Mg. In particular, the influence of depositing a thin niobium layer on t...
Detection, identification, and impact of native point defects on conduction in ITO thin films
We used depth-resolved cathodoluminescence spectroscopy and van-der-Pauw-Hall measurements to determine the effects of molecular beam epitaxy growth and processing conditions on native point defects i...
Decisive role of electron–hole and carrier–phonon interactions on luminescence performance of double perovskite Rb2HfCl6
All-inorganic lead-free vacancy-ordered halide double perovskite (VOHDP) have been attracting significant attention as a promising candidate for white light-emitting diodes, but the fundamental insigh...
Imaging GHz surface acoustic wave modes in electrostricted LaAlO3/SrTiO3 heterostructures
The LaAlO3/SrTiO3 (LAO/STO) interface hosts a gate-tunable superconducting two-dimensional electron gas (2DEG), which can be programmed to create quantum devices, such as ballistic electron waveguides...
High-performance mid-wavelength infrared InAs/InAsSb nBn detector and focal plane array at 230 K enabling imaging of room-temperature human targets
High-performance nBn mid-wavelength infrared (MWIR) photodetectors and focal plane arrays (FPAs) based on an InAs/InAsSb type-II superlattice (T2SL) absorber and an AlSb/AlAsSb T2SL superlattice have...
Influence of dislocation clusters on homoepitaxial layers grown by halide vapor phase epitaxy (001) β-Ga2O3 investigated by synchrotron x-ray topography and scanning transmission electron microscopy
Pit formation on the as-grown halide vapor phase epitaxy (001) β-Ga2O3 surface was primarily attributed to dislocation clusters in the substrate. Cross-sectional x-ray topography showed that these clu...
Unlimited field-of-view focus stacking microscopy based on tilted imaging
Focus stacking microscopy achieves high-resolution, all-in-focus imaging through multi-focus image fusion and is widely applied in fields such as biology, materials science, and semiconductor inspecti...
Large negative thermal expansion in high-strength MnNiFeSi/Cu composites with continuous Cu networks
MM'X intermetallics with magneto-structural transformations related to phase transformation have potential in refrigeration and negative thermal expansion applications. However, the application of the...
Generating all-optical frequency-multiplexed THz logic operations via fractal metasurfaces
The realization of high-speed, low-power computing beyond conventional electronics demands new paradigms for optical logic processing. Here, we present a passive terahertz (THz) metasurface platform t...
Computational analysis of parameter optimization and manufacture mechanics of LIG flexible electrode
With increasing attention paid to wearable devices and flexible sensing technologies, flexible electronics, as an interdisciplinary field integrating materials science and micro/nano manufacturing, is...
Multiple magnetic phase transitions and magnetotransport in antiferromagnet Mn5Si3 bulk single crystal
Mn5Si3 is a metallic antiferromagnet with rich temperature- and field-driven multiple transitions. Using Cu-flux-grown bulk single crystals, we uncover pronounced anomalies in resistivity and magnetor...
Direct observation of nanoscale bond-ordering in amorphous polystyrene
We used Fluctuation Electron Microscopy (FEM) to measure the correlation length of bond ordering on the nanoscale in atactic polystyrene samples of molecular weight of 350 kg/mol. After annealing, the...
Potential ultraviolet luminescence in 2D Bi2SeO5: First-principles insights into its luminescent mechanism
Nitride ultraviolet (UV) LEDs suffer from low efficiency due to high defect densities, p-type doping challenges, and poor carrier mobility. Overcoming these limitations requires defect passivation and...
Polarization–magnetization mutual control at room temperature in polycrystalline Y-type hexaferrite Ba1− <i>x</i> Rb <i>x</i> SrCo2Fe11.2Al0.8O22
Polycrystalline Y-type hexaferrite ceramics Ba1−xRbxSrCo2Fe11.2Al0.8O22 (x = 0, 0.1, 0.2, 0.4) are engineered via A-site Rb+ doping to improve electrical insulation and magnetic-order stability in mul...
High-field tunneling electroluminescence via orbital-selective emission in BSCCO/WSe2 heterostructure
Two-dimensional (2D) transition metal dichalcogenides hold exceptional promise for next-generation light-emitting applications owing to their distinctive electronic configuration and exceptional optoe...
Quantitative analysis of Sb donors in Si by photoluminescence due to bound exciton two-electron transition
Bound exciton (BE) emission line from Sb donors in Si coincides spectrally with that from P donors, preventing their separation by conventional photoluminescence (PL) spectroscopy. In contrast, the en...
End-to-end deep learning for super-oscillatory subtraction imaging
Breaking the diffraction limit in optical imaging is crucial for resolving subwavelength details in a wide range of applications, where super-oscillatory imaging and subtraction imaging are two common...
Scanning biphoton phase imaging with enhanced signal-to-noise ratio for quantum holography
Biphoton phase imaging via two-photon coincidence detection is essential for quantum holography and related quantum imaging applications. Although camera-based methods have been predominantly used in...
Reversible polyamorphic transition inducing transformation from semiconductor to metal-like state in Te53.4Sn33Ga13.6 glass under moderate pressure
We report a reversible transformation from semiconductor to metal-like state in Te53.4Sn33Ga13.6 glass far lower than the common telluride crystallization/metallization pressure (∼7.0 GPa), accompanie...
Direct fabrication of a superconducting two-dimensional electron gas on KTaO3(111) via Mg-induced surface reduction
Two-dimensional electron gases (2DEGs) at the surfaces of KTaO3 have become an exciting platform for exploring strong spin–orbit coupling, Rashba physics, and low-carrier-density superconductivity. Ye...
Black phosphorene/graphene heterostructures as high-performance SERS platforms for ultrasensitive label-free DNA nucleotides detection
Surface-enhanced Raman scattering (SERS) based on two-dimensional materials offers a route toward ultrasensitive and non-destructive biomolecular detection; however, achieving strong and tunable enhan...