Published in Applied Physics Express
We investigated the resonant tunneling of a two-spin system through the double quantum dots in Al–N-implanted silicon tunnel FETs (TFETs) by electrical-transport measurements and Landau–Zener–Stückelberg–Majorana interferometry with and without magnetic fields. Our experimental results revealed the coexistence of spin-conserving and spin-flip tunne...
Published in Applied Physics Express
We implement a single-end-access reflectometric configuration for tactile sensing, incorporating a fiber Bragg grating (FBG) inscribed in a polymer optical fiber (POF). The folded architecture of the single-mode-multimode-single-mode structure effectively mitigates the generation of interference patterns, which are commonly induced by multimodal in...
Published in Applied Physics Express
Foundry compatible vertical GaN PiN diodes were fabricated. The devices investigated in this work are based on 8 um drift layer thickness to achieve ∼1.2 kV of voltage blocking. Three different anode doping levels were fabricated on three wafers with the same p-layer thickness, and planar hybrid edge termination. The moderate anode doping level of ...
Published in Applied Physics Express
The electron spin state of the NV color center in the diamond is optically polarized and read out by laser. However, laser irradiation introduces additional temperature noise, and the zero-field splitting term in the Hamiltonian becomes unstable. The main objective of this study is to explain and eliminate the influence of temperature noise generat...
Published in Applied Physics Express
We investigated effects of Fe segregation from partially Fe-substituted MgO (MgFeO) on the magnetic properties of CoFeB/MgFeO multilayers. X-ray photoelectron spectroscopy and magnetic measurements revealed that segregated Fe reduced to metallic Fe and ferromagnetism was exhibited at the CoFeB/MgFeO interface. The CoFeB/MgFeO multilayer showed a mo...
Published in Applied Physics Express
We report current-induced magnetization switching (j sw) with a nanosecond-duration pulse current (t p) in a perpendicularly magnetized nanomagnet under the Dzyaloshinskii–Moriya interaction (DMI) and investigate the effect of the Gilbert damping constant (α), t p, and DMI value (D) on j sw via micromagnetic simulations. When α is sufficiently smal...
Published in Applied Physics Express
Tunnel magnetocapacitance (TMC) ratios greater than 450% are observed at room temperature in epitaxial FeCo/MgAl2O4/FeCo(001) magnetic tunnel junctions (MTJs). A large TMC is observed at a low bias of 75 mV, which is suitable for low-power electronics. The fitting results between experimental data and calculation based on extended Debye–Fröhlich mo...
Published in Applied Physics Express
Optical fibers of a typical chalcogenide glass, As2S3, can be sharply bent only by sideward irradiation of polarized light. The bending direction depends on the polarization; the fiber bends in the forward/backward directions of light propagation for bandgap light that is linearly-polarized orthogonal/parallel to the fiber axis. A reciprocity law b...
Published in Applied Physics Express
An ultra-thin AlGaN last quantum barrier (LQB) with a high Al content is effective in enhancing the hole injection in AlGaN-based deep UV LEDs (DUV-LEDs). However, it is very challenging to realize the ultra-thin LQB by the metalorganic chemical vapor deposition technique. In this work, a well-defined 1.0 nm thick AlGaN LQB with unintentionally hig...
Published in Applied Physics Express
We theoretically propose and demonstrate that broadband polarization-insensitive perfect visible light absorption can be realized in a periodic bimetallic nanotriangle structure with a thick gold plate. The average absorption is 95.79% from 400 nm to 800 nm. The multiple localized surface plasmon resonances of the bimetallic nanostructure are the m...
