Applied Physics Letters
Articles in this Issue
Terahertz-driven nonlinear phononics induces transient ferromagnetism in antiferromagnetic MnF2
Ultrafast optical manipulation of magnetism provides a promising pathway for next-generation spintronic technologies. Here, we theoretically demonstrate that terahertz-driven nonlinear phononics can i...
Significant reduction of thermal conductivity in monolayer MoSe2 through fractional-layer engineering
Controlling phonon-mediated heat transport in two-dimensional (2D) materials through intrinsic and disorder-free mechanisms remains a fundamental challenge. Here, we demonstrate that fractional-layer...
Surface modulation of two-dimensional perovskite for spatially selective p-type doping in van der Waals stacked MoS2 toward high-performance homojunction photodetector
Homogeneous p–n junctions in two-dimensional transition metal dichalcogenides (e.g., MoS2) demonstrate significant potential in high-performance optoelectronic devices. However, achieving stable and c...
Three-dimensional characterization of laser-induced stress in a bulk GaN substrate using stimulated Raman scattering microscopy
The three-dimensional (3D) stress distribution in a bulk GaN substrate with laser-induced indentations for laser slicing was characterized using stimulated Raman scattering (SRS) microscopy. Local shi...
Recombination mechanisms in CIGS solar cells: Insights from temperature-dependent electrical measurements
Temperature, a key environmental factor affecting photovoltaic devices, strongly influences the electrical performance of CIGS solar cells. This study examines cells with 30 and 60 nm CdS buffer layer...
Temperature-accelerated lifetime testing and failure analysis of GaAs and InGaAs laser power converters
Laser power converters (LPCs) are key components in laser wireless power transmission systems. In this work, accelerated lifetime tests were conducted on GaAs single-junction and InGaAs single-junctio...
MgB2 thermal kinetic inductance detector
Thermal Kinetic Inductance Detectors (TKIDs) inherently combine the phonon-limited noise performance of traditional bolometers with the array scalability and responsivity of superconducting kinetic in...
Pressure-induced contact resistance dominance in scanning spreading resistance microscopy of undoped InAs/GaSb heterostructure
This study examines the nature of current contrast formation and local transport mechanisms during scanning spreading resistance microscopy (SSRM) investigation of an undoped InAs/GaSb heterostructure...
Radiation-resistant InGaAs nanoscale air channel photodiodes
The nanoscale air channel photodiode (NACPD) is an emerging device that combines the advantages of vacuum phototubes and semiconductor photodiodes. Its ballistic transport mechanism theoretically enab...
Hyperspectral single-pixel imaging from visible to short-wave infrared
Hyperspectral imaging enables simultaneous acquisition of spatial and spectral information and plays a key role in material identification and compositional analysis. However, existing camera-based hy...
Performance enhancement in MoS2/CuInP2S6 photodetectors via topography-designed flexoelectric fields
Flexoelectricity, driven by strain gradients, offers a mechanical route to manipulate ferroelectric polarization and electronic states for nanoscale applications. In this work, we demonstrate topograp...
Barrier–channel intermixing and 2-dimensional electron gas degradation in Al-rich Al(Ga)N/AlGaN high electron mobility transistor heterostructures
In this work, we report on recent results in understanding and addressing the issue of interface smearing in high-aluminum content AlGaN/AlGaN heterostructures. On the one hand, the growth of high-cry...
Ultra-wide Love-mode bandgaps in high-frequency thin-film surface acoustic wave phononic crystals on LiTaO3/SiC
Thin-film surface acoustic wave (TF-SAW) phononic crystals (PnCs) are promising for manipulating gigahertz acoustic waves, but achieving wide bandgaps at high frequencies remains challenging because a...
Scattering mechanism of 2DEG in ScAlN/GaN heterostructures grown by plasma-assisted molecular beam epitaxy
We investigated the transport properties of 2DEG in ScAlN/GaN heterostructures prepared by plasma-assisted molecular beam epitaxy. Four samples with Sc compositions of 3%–17% and ScAlN barrier thickne...
Anomalous spatial response of transverse thermoelectric thin-film devices under localized thermal excitation
Localized thermal excitation is ubiquitous in practical heat-flux sensing but deviates from the uniform-heating assumption underlying conventional transverse thermoelectric (TTE) models. Here, we demo...
Significant red-emission enhancement using column-top-exposed InGaN-based nanocolumn plasmonic crystals with honeycomb lattice
Red emission remains a major bottleneck for practical full-color micro-light-emitting diodes (microLEDs) because the quantum efficiencies of InGaN decrease in the long-wavelength region. To enhance re...
Memory and logic operations in self-powered multiferroic photodetectors
The in-sensor computing paradigm, which enables rapid signal processing with low energy consumption, pursues a frontier model to reduce data transmission and redundancy. The direct conversion of light...
Experimental observation of photonic Landau levels induced by synthetic magnetic fields
Pseudo-magnetic fields, as artificially synthesized gauge fields, have been a subject of significant research attention in classical wave systems. In this study, the pseudo-magnetic field control is r...
Combined modulation of electrical and thermal transport properties in diamond (100) surfaces via reconstruction and passivation
The intrinsic metallicity of diamond (100) surfaces, arising from unsaturated dangling bonds, remains a critical bottleneck for their integration into high-performance electronic devices. Here, we con...
Metallic cicada wing-inspired surfaces fabricated via nanoimprint lithography coupled with pulse electrodeposition for enhanced wetting and thermal functionality
Nanostructured surfaces found in nature offer powerful strategies for thermal-fluid manipulation, yet their replication into durable engineered materials is constrained by fabrication limitations and...
Impact of low growth temperature on hole concentration in polarization-doped AlGaN on AlN
We investigated the impact of growth temperature on hole concentration in polarization-doped AlGaN with high AlN mole fraction on AlN, without Mg doping. A significantly lower growth temperature (arou...
Cladding based GaN waveguide engineering for efficient octave-spanning spectra generation and fceo detection
Extending the spectral content of femtosecond lasers to span at least one octave is key for their stabilization through self-referencing. An effective way to achieve this goal is to leverage soliton d...
Magnetic skyrmions in two-dimensional half-metallic MoX2 (X = S, Se)
Magnetic skyrmions hosted in two-dimensional (2D) magnets offer exciting prospects for next-generation spintronic information storage and processing. Nevertheless, progress on skyrmions in 2D systems...
Scattering-induced loss in ferroelectric photonic devices
Ferroelectric materials have colossal optical nonlinearities, but their integration into quantum photonic chips is made challenging by the additional loss mechanisms that they introduce. Here, we pres...
Multiband quantum oscillations and Kohler's rule in the extremely large magnetoresistance material pyrite PtBi2
We present magnetotransport, Seebeck effect, and magnetic torque measurements conducted on the Dirac semimetal PtBi2 single crystals with a temperature range of 1.8–300 K and magnetic field strength u...