OOIR: Observatory of International Research

Papers

(The H4-Index of Applied Physics Express is 25. 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 2021-04-01 to 2025-04-01.)

Article	Citations
1380 nm VCSELs using surface-activated bonding of GaAs-based DBRs on a Ge substrate	63
Tip-enhanced photoluminescence imaging of porphyrin tapes: exploring the nonlocality of molecular orbitals	61
Optically pumped lasing in a single crystal cavity of thiophene/phenylene co-oligomers grown via improved crystal growth methods in solution	60
Plasmonic dual-band waveguide with independently controllable band-notched characteristics	56
Increasing the flame resistance of cellulose by nonthermal plasma coupled with chemical treatments	54
Evaluation of spin-transfer-torque efficiency using magnetization reversal against a magnetic field: comparison of FeCr with negative spin polarization and NiFe	54
Si-doped AlN using pulsed metalorganic chemical vapor deposition and doping	46
Vertical β-Ga₂O₃ Schottky barrier diodes with trench staircase field plate	45
Exceptional point in tunable terahertz metasurface based on bulk Dirac semimetal	45
Vertical GaN p–n diode with deeply etched mesas by contactless photo-electrochemical etching	45
Investigation of timing margin in single-flux-quantum 4 bit adders for increasing clock frequency of gate-level-pipelined circuits	43
Detection of defects with carbon–carbon single-bonds in near-surface region of SiC induced by low-oxygen-partial-pressure annealing by using FTIR	39
Physical reservoir computing with graphene-based solid electric double layer transistor and the information processing capacity analysis	39
Oxygen vacancy region formation in BaTiO₃ adjacent to the interface between the internal electrode and the dielectric layer in Ni–Sn internal electrode multilayer ceramic capacitor exhibiti	38
Orthogonal set of engineered synapse organizers for multiplexed molecularly inducible neuron-microelectrode interfaces	34
Improving AlN crystalline quality by high-temperature ammonia-free microwave plasma chemical vapor deposition	34
Artificial control of layer thickness in Co-Pt alloy multilayer nanowires fabricated by dual-bath electrodeposition in nanoporous polycarbonate membranes	33
High-frequency characteristics of ultra-short gate MoS₂ transistors	29
AlGaN/GaN HEMT on a free-standing GaN substrate with record 85.2% power-added efficiency at 2.45 GHz	29
8.7 A/700 V β-Ga₂O₃ Schottky barrier diode demonstrated by oxygen annealing combined with self-aligned mesa termination	27
Corrigendum: “Fabrication of microfluidic electrogenerated chemiluminescence cells incorporated with titanium dioxide nanoparticles to improve luminescent performances” [Appl. Phys. Express 13, 107001	27
Semitransparent perovskite solar cells with exceptional efficiency and transmittance	27
Sub-pT magnetic field detection by tunnel magneto-resistive sensors	27
Stabilization of the ferroelectric phase in Hf-based oxides by oxygen scavenging	26
Enhancement of quantum entanglement between twin beams via a four-wave mixing process with double feedback	26

Triarylborane-based thermally activated delayed fluorescence materials with an efficient reverse intersystem crossing	25
Half-integer Shapiro-steps in superconducting qubit with a π-Josephson junction	25