OOIR: Observatory of International Research

Papers

(The H4-Index of Applied Physics Express is 23. The table below lists those papers that are above that threshold based on CrossRef citation counts [max. 250 papers]. The publications cover those that have been published in the past four years, i.e., from 2022-05-01 to 2026-05-01.)

Article	Citations
Vertical GaN p–n diode with deeply etched mesas by contactless photo-electrochemical etching	78
Formation of neuron-microelectrode junction mediated by a synapse organizer	68
Magnetism control of thin CoFeB layers by ferroelectric polarization	64
Detecting the orbital angular momentum from speckle via convolutional neural network	49
Thermoelectric measurements of nanomaterials by nanodiamond quantum thermometry	48
Enhancement of short-wavelength range responsibility for PIN silicon photodetectors using additional fluorescent carbon quantum dots nanoparticles	38
Evaluation and bioparticle density correlation analysis of extended gate HEMT sensors for biological detection from microscopic view	37
Broadband optical wavelength conversion through four-wave mixing in W3-type AlGaAs photonic crystal waveguides	35
Strong light confinement and optical force enhancement in phosphorene with acoustic plasmons	33
One-step assembly of TA-FeIII supramolecular shell on AgNPs surface for regulating fluorescence intensity of quantum dots	33
N-polar GaN p-n junction diodes with low ideality factors	32
Corrigendum: GaN high electron mobility transistors with a breakdown voltage over 2500 V achieved by low temperature MBE growth, subdivision of channel, and single field plate structure [Appl. Phys. E	31
Magnetic field tuning of photoelectric and photoluminescence effects in BiFe_0.9Co_0.1O₃ thin film	31
Vortex structure in relaxed BaTiO₃/SrTiO₃ superlattice	30
High power diode lasers at 1470 nm with continuous power exceeding 10 W	30
Femtosecond Z-scan measurement of third-order nonlinear optical response of fluorine-doped tin oxide	30
Wide-field imaging of the magnetization process in soft magnetic-thin film using diamond quantum sensors	29
Lightweight and high-precision materials property prediction using pre-trained Graph Neural Networks and its application to a small dataset	29
Axis thermal expansion switching in transition-metal zirconides TrZr₂ by tuning the c/a ratio	24
Recent advances in the physics of Dirac plasmons in graphene and related 2D materials and their THz device applications	24
High throughput observation of latent images on resist using laser-based photoemission electron microscopy	24
Quartz-free hydride vapor phase epitaxy for production of large size GaN-on-GaN epitaxial wafers	23
Layer-number tailoring and template-induced orientation control of 2D perovskites on 3D perovskites by adopting the Dion–Jacobson phase	23
Next-generation light-emitting devices combining organic emitters and halide perovskites	23
RFSoC-based radio-frequency reflectometry in gate-defined bilayer graphene quantum devices	23

Effective suppression of interface states in recessed-gate MIS-HEMTs by TMAH wet etching