Journal of Applied Physics
Articles in this Issue
Modeling threading dislocation density evolution in Ge/Si during cyclic annealing
A compact kinetic framework is developed to describe threading dislocation evolution in Ge/Si buffers by linking the final dislocation density to the initial defect level and an Arrhenius-weighted the...
Electrical and optical analysis of core–shell InGaN/GaN nanowire array μLEDs by analytical compact modeling
We extend an analytical electrical compact model, originally developed for planar InGaN/GaN quantum-well (QW) micro-light-emitting diodes (μLEDs), to core–shell InGaN/GaN QW nanowire-array μLEDs. By e...
Experimental and numerical study of dragonfly ( <i>Anax parthenope julius</i> ) in climbing flight: Aerodynamic mechanisms for stable ascent
Dragonflies' exceptional climb capability plays a crucial role in essential survival behaviors such as predation and evasion. However, the climb performance in aerial vehicles remains relatively weak,...
Quantitative analysis of grain boundary attributes and their impact on device performance in perovskite solar cells based on 3D modeling
The complex generation, transport, and recombination behaviors of charge carriers in perovskite solar cells are fundamentally governed by the diverse orientations, locations, and defect properties of...
Background pressure effects on gridded ion thruster operations
Power level requirements for near-term and future envisioned 10–100 + kW electric propulsion systems are expected to outpace the capability of ground test facilities to provide an adequate test enviro...
Amplitude modulation of acoustic oscillations inside an acoustic resonator via the thermoacoustic effect: An experimental study
Acoustic energy harvesting has attracted considerable attention due to its promising applications in low-power sensors, self-powered monitoring systems, and Internet of Things (IoT) nodes. In this stu...
Piezoelectric energy harvesting using defect induced cruciform shaped phononic crystal with multiple bandgaps
Although numerous studies have been directed toward the piezoelectric energy harvesting using phononic crystals, generating high voltage output remains challenging. This is mainly due to the difficult...
Thickness-dependent spin pumping in YIG/W90Ti10 bilayers
We investigate the spin-pumping efficiency in YIG/W90Ti10 bilayers by measuring the thickness dependence of both the YIG and WTi layers by broadband ferromagnetic resonance (FMR) spectroscopy. The dep...
Coupling-controlled low-dispersion quasi-longitudinal wave and its application in highly robust acoustic resonators
Acoustic waves in thin films always suffer from high dispersion, leading to significant sensitivity to film thickness and corresponding device instability in practical applications. The quasi-longitud...
Effect of atomic-scale surface roughness on the electrical resistivity of epitaxial Ru(0001) thin films
The effect of atomic-scale surface roughness on electron transport is investigated using 6.5 nm-thick epitaxial Ru(0001) films, a promising metal for next-generation interconnects. Sputter deposition...
Extremely low-frequency vibration–rotation converter based on granular crystals
Recent study of granular crystals has provided a unique platform for elastic wave control, facilitating the applications of mechanical functional devices. In this work, we propose a granular-crystal-b...
Optical gain analysis of MOCVD-grown InAs/InP quantum dot lasers
The optical gain characteristics of InAs/InP quantum dot (QD) laser structures grown on an InP (001) substrate has been investigated at room temperature, using the segmented contact stripe length meth...
Measurements of elastic constants of wide Al-composition range AlGaN epi-materials from metalorganic chemical vapor deposition
Brillouin scattering measurements and investigation on AlGaN alloy films with Al compositions of 00.62 from metalorganic chemical vapor deposition are performed. Six elastic constants and bulk modulus...
Physics-data hybrid-driven neural network for radiation-pattern analysis of optical nanostructures
Far-field radiation pattern is a pivotal metric for characterizing the electromagnetic response of dielectric nanostructures. Traditional full-wave numerical methods, including the finite-difference t...
Saw-tooth slot antenna sensor for dielectric characterization of alcohols, saline solutions, and glucose
In this study, a low-profile and saw-tooth-shaped slot antenna sensor is proposed for liquid characterization, demonstrating sensitivity to dielectric variations in glucose, saline, and alcohol-based...
Machine learning-driven optimization of the tunability—Efficiency trade-off in dual-modulated MoS2/WSe2 van der Waals optoelectronics
In van der Waals heterostructures, the quantum-confined Stark effect enables electrical control of optical transitions, yet it carries an intrinsic penalty: every field increment that redshifts the em...