Applied Physics Letters
Articles in this Issue
Atmospheric pressure plasma penetrating into multilayer fiber membrane
Atmospheric pressure cold plasma has been extensively used for low-melting fiber membrane surface modification to improve their inert properties. A significant challenge arises from the plasma's limit...
A stretchable thermoacoustic sounder based on vertical graphene
Thermoacoustic effect sounders have great potential in achieving the vibration-free sound generation of conductive films. However, the fabrication of stretchable conductive films with high stability r...
Artificial tactile perception enabled by triboelectric effect
Artificial tactile receptors based on triboelectric nanogenerators (TENGs) hold great promise due to their high sensitivity and active pressure sensing. In this Perspective, we summarize the working m...
Size-dependent localized acoustic vibrations in MoS2 thin film with patterned nanohole arrays
The study of coherent acoustic vibrations in nanostructured materials, particularly in two-dimensional (2D) semiconductors, has gained significant interest due to their potential applications in sensi...
Reconfigurable phase-change metasurface for multifunctional control of chiral emission
In optoelectronics and photonics, developing multifunctional light-emitting devices has become a prominent research area. However, achieving integration of polarization control, intensity modulation,...
Dynamic tuning of surface lattice resonances via mechano-optical coupling in flexible nanoring metasurfaces
Flexible metasurfaces comprising arrays of sub-wavelength thick nanoparticles embedded in soft and transparent substrates have attracted significant research interest due to their ability to generate...
Epitaxial lateral overgrowth of <i>c</i>-plane <b> <i>α</i> </b>-Ga2O3 using a stripe mask with ultra-narrow windows
We demonstrated the epitaxial lateral overgrowth of α-Ga2O3 by halide vapor phase epitaxy using a stripe mask with an ultra-narrow window width of 50 − 750 nm. α-Ga2O3 stripes were formed only on the...
Signal inversion and defect selectivity in charge pumping electrically detected magnetic resonance of a 4H-SiC n-channel metal-oxide-semiconductor field-effect transistor
Charge pumping electrically detected magnetic resonance (CP-EDMR) has previously been demonstrated as a characterization technique for performance-limiting point defects in metal-oxide-semiconductor f...
Kinetics of short-range order formation in GeSn alloy: MBE vs CVD
Recently, short-range order (SRO) has attracted significant attention, challenging the conventional view of the atomic positions in alloys being random. Furthermore, the presence of SRO has been predi...
Design of Au urchin embedded in PMMA: A solution to balance photoresponse and dark-current for WS2 plasmonic photodetectors
The local surface plasmon resonance effect has made an outstanding contribution to high-performance optoelectronic devices due to its unique light absorption ability. However, it is urgent to solve th...
Anomalously dominating four-phonon scattering in pressure-dependent thermal transport in beryllium oxide
Rocksalt beryllium oxide (BeO) exhibits a unique combination of a large bandgap and high dielectric constant, but it is stable only at high pressures. While ambient-pressure wurtzite BeO plays a cruci...
Anharmonic suppression of ultra-narrow graphene nanoribbons confined in carbon nanotubes through host–guest interactions
One-dimensional (1D) graphene nanoribbons (GNRs) hold significant promise for graphene-based nanodevices, but their reduced dimensionality leads to enhanced anharmonicity, which strongly impacts their...
Efficient eco-friendly light-emitting diodes enabled by lead-free cesium manganese bromine with superior luminescence
Metal halide perovskites have opened up a frontier in light-emitting diodes (LEDs) by virtue of their superior optoelectronic performances. Nevertheless, concerns regarding the potential lead toxicity...
Controlled polarity inversion in GaAs/Ge/GaAs{111} heterostructures
We have fabricated the GaAs/Ge/GaAs heterostructures on the {111}-oriented substrates using molecular-beam epitaxy for quasi-phase matching applications in nonlinear optics. The nonlinear optical coef...
Origin of reduced efficiency in GaN-based micro-LEDs studied by scanning near-field optical microscopy
The quantum efficiency of micro-light emitting diodes (micro-LEDs) is lower than that of large area LEDs. This efficiency reduction is typically attributed to the nonradiative Shockley–Read–Hall recom...
Quantitative mapping of cell–cell interactions using the micropipette force sensor
Mechanical interactions among cells play an essential role in immune processes and tumorigenesis. However, quantitative mapping of the interactions between suspended cells remains challenging. In this...
Tailoring Pt nanoboxes with Bi atoms and SnO2 adatoms for efficient hydrogen evolution electrocatalysis
Engineering Pt-based nanocrystals at the atomic scale holds promise for achieving high-performance electrocatalysts, yet it remains challenging for multimetallic and hierarchical nanostructures. Herei...
Carbon in GaN as a nonradiative recombination center
Trap-assisted nonradiative recombination has been shown to limit the efficiency of optoelectronic devices. While substitutional carbon (CN) has been suggested to be a nonradiative recombination center...
Spatial sound modulation through manual reconfiguration of phased plate
Ultrasonic phased array technology, while versatile, often requires complex computing resources and numerous amplifier components. We present a manually reconfigurable phased array that physically con...
Oxygen diffusion in LaInO3 films grown by molecular beam epitaxy
Oxygen tracer diffusion experiments were used to characterize oxygen transport, and thus oxygen-vacancy behavior, in thin films of the perovskite-type oxide LaInO3, grown by molecular beam epitaxy (MB...
Tunable metamaterial with quantitatively switchable anapole modes via quasi-BIC using two methods
Traditional anapole metamaterials exhibit limited tunability and only support single mode. Herein, we employ two methods to achieve the switch from anapole to dual-anapole in a simple metal-perforated...
Generation of ring-shaped optical skyrmion with a high topological number
Optical skyrmions, unlike their magnetic counterpart, can be generated and detected with a wide variety of topological structures, as they are missing constraints due to energy minimization and availa...
Emerging thermal metrology for ultra-wide bandgap semiconductor devices
Ultrawide bandgap (UWBG) semiconductor materials, such as β−Ga2O3 (gallium oxide), AlN (aluminum nitride), AlxGa1−xN (AlGaN), and diamond, have emerged as essential candidates for components in high-p...
Enhancement of second harmonic generation in two-dimensional monolayer materials empowered by merging BICs of photonic crystals
We investigate second harmonic generation (SHG) in two-dimensional (2D) monolayer materials on silicon photonic crystals by van der Waals contacts. By finely tuning the thickness of the photonic cryst...
Anomalous thermal conductivity anisotropy in bulk hexagonal AlN induced by structural phase transition
Hexagonal aluminum nitride (h-AlN), an ultrawide bandgap semiconductor with exceptional thermal conductivity, holds great promise for applications in power electronics and optoelectronics. Prior studi...