[2024 OPEN ACCESS] Ultra-thin optical power converters based on Gires–Tournois resonator configuration operating in high-order modes 2024 Appl. Phys. Express 17 072002 iopscience.iop.org/article/10.3... #APEX #Physics #Openaccess #optical #resonator #OPC

[2025 OPEN ACCESS] Instantaneous deposition-rate modulator for vacuum vapor deposition: fabrication of polarization gradated organic film 2025 Appl. Phys. Express 18 021001 iopscience.iop.org/article/10.3... #APEX #OpenAccess #Physics #organic #LED #molecular #Alq3 #velocity #deposition

[2025 OPEN ACCESS] Improving radiation tolerance with room temperature annealing of pre-existing defects 2025 Appl. Phys. Express 18 017001 iopscience.iop.org/article/10.3... #APEX #OpenAccess #Physics #Radiation #tolerance #Zener #diode #ion #irradiation

[2024 OPEN ACCESS] Room temperature optical coupling of neodymium ions to photonic crystal L3 cavity in gallium nitride semiconductor 2024 Appl. Phys. Express 17 072001 iopscience.iop.org/article/10.3... #APEX #Physics #Openaccess #photonic #crystal #gallium #nitride #semiconductor

[Open Access] High-energy-resolution passivated implanted planar silicon detectors 2025 Jpn. J. Appl. Phys. 64 011004 iopscience.iop.org/article/10.3... #JJAP #physics #Openaccess #Alpha #particle #detector #irradiation #efficiency

[Open Access] Analysis of a second peak of electron density observed in high-power impulse magnetron sputtering plasma using a Langmuir probe 2024 Jpn. J. Appl. Phys. 63 016003 iopscience.iop.org/article/10.3... #JJAP #physics #openaccess #Langmuir #probe #electron #ionisation #density #plasma

[Latest Article: Open Access] High-power oscillations exceeding 1 mW using a single resonant-tunneling diode oscillator in the 0.6–0.7 THz range 2025 Appl. Phys. Express 18 111001 iopscience.iop.org/article/10.3... #APEX #OpenAccess #Physics #Terahertz #THz #Resonant #tunneling #diode #RTD

[2025 OPEN ACCESS] 1380 nm VCSELs using surface-activated bonding of GaAs-based DBRs on a Ge substrate 2025 Appl. Phys. Express 18 016507 iopscience.iop.org/article/10.3... #APEX #OpenAccess #Physics #Surface #bonding #wavelength #infrared #Vertical #Cavity #Surface #Emitting #Laser

Microgrooves with low-index facets in halide vapor deposited (001) β-Ga2O3: origin of reverse leakage current in Schottky barrier diodes observed by high-sensitive emission microscopy and synchrotron X-ray topography 2024 17 071004 iopscience.iop.org/article/10.3... #APEX #Physics

[Open Access] Impact of aluminum concentration variations on the performance of thin barrier enhancement-mode GaN MIS-HEMTs 2025 Jpn. J. Appl. Phys. 64 01SP18 iopscience.iop.org/article/10.3... #JJAP #physics #Openaccess #AlGaN #GaN #HEMT #ferroelectric #thin #barrier

[Open Access] Oxide-semiconductor channel ferroelectric field-effect transistors for high-density memory applications: 3D NAND operation and the potential impact of in-plane polarization 2024 Jpn. J. Appl. Phys. 63 014003 iopscience.iop.org/article/10.3... #JJAP #physics #openaccess #FET

[Latest Article: Open Access] Fabrication of β-Ga2O3/air-gap structures on (010) β-Ga2O3 by wet etching in tetramethylammonium hydroxide (TMAH) 2025 Appl. Phys. Express 18 116501 iopscience.iop.org/article/10.3... #APEX #OpenAccess #Physics #Ga2O3 #TMAH #cantilever #bridge #etching #MEMS

[2025 OPEN ACCESS] AlScN/GaN HEMTs with 4 A/mm on-current and maximum oscillation frequency >130 GHz 2025 Appl. Phys. Express 18 016506 iopscience.iop.org/article/10.3... #APEX #OpenAccess #Physics #FET #Heterostructures #Ohmic #Alloys #Nitrides #Semiconductors #Electrical

[2024 OPEN ACCESS] Thermal conductivity of BaZrO3 and KTaO3 single crystals 2024 Appl. Phys. Express 17 071003 iopscience.iop.org/article/10.3... #APEX #Physics #Openaccess #thermal #conductivity #single #crystal #perovskite

[Open Access] Hot-wire-type micromachined chemiresistive gas sensors for battery-powered city gas alarms 2025 Jpn. J. Appl. Phys. 64 01SP13 iopscience.iop.org/article/10.3... #JJAP #physics #Openaccess #Gas #sensor #MEMS #Methane #oxide #semiconductor #SnO2

[Open Access] Simultaneous observation of semi-continuous and Ramsey-coherent population trapping resonances using the Ramsey pulse sequence with drive current modulation 2024 Jpn. J. Appl. Phys. 63 012005 iopscience.iop.org/article/10.3... #JJAP #physics #openaccess #coherent #population #trap

[2025 OPEN ACCESS] Fabrication of GaN vertical junction barrier Schottky diode by Mg diffusion from shallow N/Mg ion-implantation segment 2025 Appl. Phys. Express 18 016505 iopscience.iop.org/article/10.3... #APEX #OpenAccess #Physics #GaN #Vertical #doping #Mg #ion #implantation #diode #Schottky

[2024 OPEN ACCESS] Electrolyte gating using ionic crystals: demonstration of iontronics with ionic crystals 2024 Appl. Phys. Express 17 071002 iopscience.iop.org/article/10.3... #APEX #Physics #Openaccess #electrolyte #ionic #crystal #CNT #graphene

[Open Access] Reflectance spectral studies of spark plasma sintered tungsten carbide pellet 2025 Jpn. J. Appl. Phys. 64 010905 iopscience.iop.org/article/10.3... #JJAP #physics #Openaccess #solar #absorber #thermal #energy #reflectance #plasma #theory #calculation

[Spotlights 2024] Near-infrared gas spectroscopy based on plasmonic photodetector applied for multiple gas species 2024 Jpn. J. Appl. Phys. 63 012004 iopscience.iop.org/article/10.3... #JJAP #physics #surface #plasmon #resonance #spectroscopy #sensing #Schottky #infrared

[2025 OPEN ACCESS] 2 kV Al0.64Ga0.36N-channel high electron mobility transistors with passivation and field plates 2025 Appl. Phys. Express 18 016504 iopscience.iop.org/article/10.3... #APEX #OpenAccess #Physics #AlGaN #HEMT #Ultrawide #bandgap #semiconductor #transistor #Power

[2024 OPEN ACCESS] High linearity AlGaN/GaN HEMTs with Au-free Ti/Al/Ni/Ti ohmic contacts for Ka-band applications 2024 Appl. Phys. Express 17 071001 iopscience.iop.org/article/10.3... #APEX #Physics #Openaccess #GaN #HEMT #ohmic

[OPEN ACCESS] Ultra-fast etching of photoresist by reactive atmospheric-pressure thermal plasma jet with surface temperature measurement 2025 Appl. Phys. Express 18 016503 iopscience.iop.org/article/10.3... #APEX #OpenAccess #Physics #Plasma #Etching #Temperature #Measurement #Organic #film #Edge

[OPEN ACCESS] High breakdown voltage of 1.3 kV and low turn-on voltage of 0.48 V β-Ga2O3 heterojunction barrier Schottky diode with tungsten Schottky contact 2024 Appl. Phys. Express 17 066501 iopscience.iop.org/article/10.3... #APEX #Physics #Openaccess #Ga2O3 #heterojunction #Schottky #diode

[2025 OPEN ACCESS] Multi-channel AlN/GaN Schottky barrier diodes 2025 Appl. Phys. Express 18 016502 iopscience.iop.org/article/10.3... #APEX #OpenAccess #Physics #GaN #Schottky #Barrier #Diodes #channel #AlN/GaN #2DEG

[2024 OPEN ACCESS] Epitaxial growth of high-quality Mg3Sb2 thin films on annealed c-plane Al2O3 substrates and their thermoelectric properties 2024 Appl. Phys. Express 17 065501 iopscience.iop.org/article/10.3... #APEX #Physics #Openaccess #epitaxy #thermoelectric #Al2O3 #Zintl

[Open Access] Theoretical study on structural stability and miscibility of ScAlN alloys: effect of lattice constraint 2025 Jpn. J. Appl. Phys. 64 01SP03 iopscience.iop.org/article/10.3... #JJAP #physics #Openaccess #ScAlN #structure #stability #density #function #calculation

[Progress Review 2024 Open Access] Thermoelectric cloths using carbon nanotube yarn for wearable electronics 2024 Jpn. J. Appl. Phys. 63 010803 iopscience.iop.org/article/10.3... #JJAP #physics #Openaccess #thermoelectric #generator #cloth #carbon #nanotube #yarn #protein

[Review] Advancements in power device technologies to meet the demands of power electronics applications 2025 Appl. Phys. Express 18 110102 iopscience.iop.org/article/10.3... APEX-NEXT (Noteworthy Excellent Topics) iopscience.iop.org/collections/... #APEX #OpenAccess #Review #Physics #GaN #MOSFET

[2024 OPEN ACCESS] Drag of electron–hole bilayer in silicon-on-insulator metal-oxide-semiconductor field-effect transistor at low temperature 2024 Appl. Phys. Express 17 064003 iopscience.iop.org/article/10.3... #APEX #Physics #Openaccess #electron #silicon #MOSFET #oxide

[INVITED REVIEW : FREE ARTICLE] Recent developments on plasma based neutron sources from microscopic innovations to meter-scale applications 2025 Jpn. J. Appl. Phys. 64 010002 iopscience.iop.org/article/10.3... #JJAP #Physics #review #laser #neutron #spherical #tokamaks #microreactors #beamline

[Open Access] Evaluation of electron–phonon coupling strength and average phonon energy in MoS2 thin film 2024 Jpn. J. Appl. Phys. 63 12SP25 iopscience.iop.org/article/10.3... #JJAP #physics #Openaccess #2D #TMDCs #MoS2 #phonon #energy #electron #coupling

[2024 OPEN ACCESS] Enhanced field-effect mobility (>250 cm2/V·s) in GaN MOSFETs with deposited gate oxides via mist CVD 2024 Appl. Phys. Express 17 064002 iopscience.iop.org/article/10.3... #APEX #Physics #Openaccess #GaN #MOSFET #oxide #CVD

[2025 OPEN ACCESS] 3 kV monolithic bidirectional GaN HEMT on sapphire 2025 Appl. Phys. Express 18 016501 iopscience.iop.org/article/10.3... #APEX #OpenAccess #Physics #GaN #HEMT #Bidirectional #Transistor #Bandga #Mobility #Transistor

[Spotlight] An ultrasonic transducer focusing ultrasound into a thin waveguide by two elliptical reflectors 2024 Appl. Phys. Express 17 064001 iopscience.iop.org/article/10.3... Spotlight iopscience.iop.org/journal/1882... #APEX #Physics #Openaccess #ultrasonic #transducer #ultrasound #reflector

[Latest Article] Degradation driven by ambient oxygen and moisture during film preparation of solution-processed PHPS barrier films 2025 Appl. Phys. Express 18 115501 iopscience.iop.org/article/10.3... #APEX #OpenAccess #Physics #perhydropolysilazane #VUV #irradiation #environment #barrier #film

[OPEN ACCESS] Enantiospecific mirror-imaged growth in overlayers of enantiopure thiadiazole-[9]helicene on Au(111) without commensurability 2025 Appl. Phys. Express 18 015502 iopscience.iop.org/article/10.3... #APEX #OpenAccess #Physics #Surface #Chiral #molecule #electron #diffraction #Epitaxial

[2024 OPEN ACCESS] Enhancement of quantum entanglement between twin beams via a four-wave mixing process with double feedback 2024 Appl. Phys. Express 17 062002 iopscience.iop.org/article/10.3... #APEX #Physics #Openaccess #quantum #beam #optics #wave

[Open Access] The acoustic parameter by acoustic microscopy reveals the physiological transition of brain immune cells 2025 Jpn. J. Appl. Phys. 64 01SP01 iopscience.iop.org/article/10.3... #JJAP #physics #Openaccess #microglia #ultrasound #acoustic #impedance #immune #memory

[Open Access] WS2-contact resistance reduction to nickel by Al2O3 insertion 2024 Jpn. J. Appl. Phys. 63 12SP23 iopscience.iop.org/article/10.3... #JJAP #physics #Openaccess #TMDC #tungsten #disulfide #contact #MIS

[APEX REVIEW : Open Access] Prospects for β-Ga2O3: now and into the future 2024 Appl. Phys. Express 17 090101 Kohei Sasaki, Novel Crystal Technology iopscience.iop.org/article/10.3... #APEX #OpenAccess #Physics #Review #Ga2O3 #gallium #oxide

[2024 OPEN ACCESS] An inverted singlet-triplet excited state in a pentaazaphenalene derivative (5AP-N(C12)2) 2024 Appl. Phys. Express 17 061001 iopscience.iop.org/article/10.3... #APEX #Physics #Openaccess #OLED #organic #fluorescence #pentaazaphenalene

[APEX REVIEW : Open Access] Fundamentals and recent advances of terahertz resonant tunneling diodes 2024 17 070101 Safumi Suzuki, Masahiro Asada, Tokyo Institute of Technology iopscience.iop.org/article/10.3... #APEX #OpenAccess #Physics #Review #terahertz #resonant #tunneling #diode

[2024 OPEN ACCESS] 783 MHz fundamental repetition rate all-fiber ring laser mode-locked by carbon nanotubes 2024 Appl. Phys. Express 17 062001 iopscience.iop.org/article/10.3... #APEX #Physics #Openaccess #fiber #laser #saturable #absorber

[APEX REVIEW : OPEN ACCESS] Surface and interface physics driven by quantum materials 2024 Appl. Phys. Express 17 050101 Shuji Hasegawa, University of Tokyo iopscience.iop.org/article/10.3... #APEX #OpenAccess #Physics #Review #Surface #interface #quantum #material

[2024 OPEN ACCESS] Response of lettuce seeds undergoing dormancy break and early senescence to plasma irradiation 2024 Appl. Phys. Express 17 057001 iopscience.iop.org/article/10.3... #APEX #Physics #Openaccess #plasma #agriculture #DBD #ESR

[OPEN ACCESS] Surface patterning of wide-gap semiconducting β-Ga2O3 thin films by area selective crystallization via room-temperature excimer laser annealing and low-toxic wet etching processes 2025 Appl. Phys. Express 18 015501 iopscience.iop.org/article/10.3... #APEX #OpenAccess #Physics

[2024 OPEN ACCESS] Fabrication of free-standing GaN substrates using electrochemically formed porous separation layers 2024 Appl. Phys. Express 17 055502 iopscience.iop.org/article/10.3... #APEX #Physics #Openaccess #GaN #porous #electrochemical #HVPE

[Open Access] Observation of point defect and carrier lifetime distributions in hydrogen or helium ion implanted SiC PiN diodes for suppression of bipolar degradation 2025 Jpn. J. Appl. Phys. 64 010901 iopscience.iop.org/article/10.3... #JJAP #physics #Openaccess #SiC #ion #implantation #bipolar

[Open Access] Enhanced photovoltaic performance and longevity of perovskite modules via interface engineering of transport layer 2024 Jpn. J. Appl. Phys. 63 12SP20 iopscience.iop.org/article/10.3... #JJAP #physics #Openaccess #interface #engineering #longevity #solar #module #perovskite