Journal of Applied Physics
Articles in this Issue
Terahertz detection using germanium-based photoconductive antennas on various substrates
Germanium (Ge) is emerging as a promising material for terahertz (THz) devices due to its non-polar nature, which enables gapless, broadband radiation. It also offers the advantage of CMOS compatibili...
Phase-field simulation of countercurrent spontaneous imbibition in fractured porous media with heterogeneous mixed wettability
Countercurrent spontaneous imbibition governs fracture–matrix fluid exchange in fractured reservoirs. While the influence of wettability on imbibition has been widely recognized, the pore-scale mechan...
Micrometer-scale displacement and thickness sensing using a single terahertz resonant-tunneling diode
Resonant-tunneling diodes (RTDs) support room-temperature terahertz (THz) oscillation and simultaneous THz-band detection, enabling compact monostatic THz sensors for practical and cost-effective sens...
A stochastic simulation of the dislocation-mediated etching of porous GaN distributed Bragg reflectors
Distributed Bragg reflectors (DBRs) can be fabricated by electrochemically etching nitride epitaxial structures consisting of alternating layers of highly n-type doped and non-intentionally doped (NID...
Synergistic damage buildup and helium segregation in helium-accumulated copper under overlapping cascades
The accumulation of transmutant helium (He) poses a major challenge to the structural integrity of materials in the nuclear industry. To elucidate the He effects on microstructural evolution, we perfo...
Green synthesis of TiO2 nanoparticles using <i>Azadirachta indica</i> flower extract and evaluation of their photocatalytic performance
Industrial dyes such as methylene blue (MB) and methyl orange (MO) pose significant ecological risks when released into aquatic systems. In this study, titanium dioxide nanoparticles (TiO2 NPs) were s...
Evaluation of thermal and electrical properties of GaN grown using oxide vapor-phase epitaxy
In this study, we investigated the thermal and electrical properties of gallium nitride (GaN) crystals grown usingthe oxide vapor-phase epitaxy (OVPE) method. We comprehensively evaluated the thermal...
Near transform-limited single photons from rapid-thermal annealed quantum dots
Single-photon emitters are essential components for quantum communication systems, enabling applications such as secure quantum key distribution and the long-term vision of a quantum internet. Among v...
Hopping conduction in GeSiSn alloys: Impact of structural disorder on electrical transport
Temperature-dependent charge transport in epitaxial GeSiSn films with varying thicknesses and Si and Sn content, grown on Ge/Si(001) substrates, was investigated using admittance spectroscopy. The con...
Study on catastrophic optical damage behavior of GaN-based high-power blue laser diodes
Facet degradation in blue GaN-based laser diodes operating at output optical powers exceeding 17 W is investigated. Facet coating failure in large optical cavity devices is shown to originate from an...
Stabilizing low-loss pyrochlore phase for high-efficiency energy storage
Bismuth-based pyrochlore phases, as linear dielectrics, offer a compelling combination of ultralow loss, moderate permittivity, and high breakdown strength, rendering them promising for dielectric ene...
Silicon-based metamaterial selective emitter for thermophotovoltaic applications
In this work, we present the design and optimization of a silicon-based selective emitter (SE) for thermophotovoltaic (TPV) systems with enhanced spectral efficiency. The proposed SE combines a broadb...
Pressure-threshold explosive cathode processes as the dominant source of a high-density plasma in nanosecond air discharges
We report a pressure-threshold phenomenon in nanosecond air discharges: explosive cathode processes become the dominant source of a dense highly ionized plasma at air pressures above ∼100 Torr. Picose...
Achieving ultrastable piezoelectric response over a wide temperature range in BF–BT ceramics via phase-domain-defect regulation
Developing lead-free piezoelectric materials with high thermal stability is essential for sensing and actuation applications in harsh environments. In this work, trace amounts of lithium niobate (LiNb...
Study of linear electro-optical effects in silicon materials under the action of continuous stress field
To investigate the mechanism of the linear electro-optic effect in strained silicon and advance the practical application of silicon-based optical modulators, this paper addresses the limitations of e...
Modeling chirality transfer at graphene–liquid crystal interfaces driven by non-collinear graphene corrugations
Graphene exhibits optical chirality only when its in-plane mirror symmetries are broken—by strain corrugation, buckling, interlayer twist, chemical corrugation, or planar patterning—yet the microscopi...
Evolution of the near-infrared-to-ultraviolet model dielectric function of InAs from room temperature to 250 °C determined by spectroscopic ellipsometry
We present a model dielectric function composed of critical point functions in order to parameterize the temperature and wavelength dependencies of the dielectric function of InAs. This model is based...
Reconfigurable generation of order-controllable acoustic orbital angular momentum beams
Acoustic vortex beams carrying orbital angular momentum (OAM) have attracted a broad research interest in the past 20 years. Due to the orthogonality of OAM beams with different orders, a wealth of in...
Effect of Ga composition of a Ga–Na melt on the dislocation density in the coalescence region of GaN crystals grown by the Na-flux multi point seed technique
Low threading dislocation density (TDD) GaN substrates are essential for fabricating vertical GaN power devices. In this study, we fabricated large-diameter, low-TDD GaN wafers using the Na-flux multi...
THz near-field spatial mapping of dipole–dipole interactions in free space and near interfaces
Dipole–dipole interactions are central to energy-transfer processes. Understanding the interaction dynamics is essential across diverse fields, including solar energy harvesting, organic light-emittin...
High-pressure sintering driven defect modulation for enhanced thermoelectric performance in Li+/S2− co-doped Cu2Se
As a typical ionic crystal exhibiting liquid-like behavior, p-type semiconductor Cu2Se has been a research hotspot in thermoelectric materials due to its low thermal conductivity. In this work, by var...
On mechanism of phase stabilization in ferroelectric and high- <i>k</i> HfO2
We present a systematic first-principles study of dopant-induced phase stabilization in HfO2 across ferroelectric (FE) and non-ferroelectric polymorphs for a large set of dopants. To overcome the stro...
Synergistic experimental and theoretical investigation of ZnO derived from ZIF-8 photocatalysts for methylene blue degradation under visible light
Metal organic frameworks (MOFs) have emerged as a promising structure to improve the physicochemical performance of semiconductors by constructing MOF-based structures. In this study, ZnO photocatalys...
Synchrotron-radiation x-ray topography and reticulography of bulk β-Ga2O3 crystals grown by the cold crucible method
The structural properties of a β-Ga2O3 single crystal grown by the oxide crystal growth from cold crucible (OCCC) method were investigated using synchrotron radiation x-ray topography and x-ray reticu...
Semiconducting p-GaN gate HEMT with avalanche-like non-destructive breakdown capability
Non-destructive avalanche breakdown is crucial for enhancing the robustness of power devices against overvoltage stresses and surge energy, whereas state-of-the-art GaN HEMTs present no avalanche capa...