Applied Physics Express and JJAP

[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

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#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

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#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

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#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

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#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

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#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)
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#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