Masato Naruse
A5103275478- Superconducting and THz Device Technology
- Radio Astronomy Observations and Technology
- Physics of Superconductivity and Magnetism
- Microwave Engineering and Waveguides
- Particle Detector Development and Performance
- Atomic and Subatomic Physics Research
- Radiation Detection and Scintillator Technologies
- Radio Frequency Integrated Circuit Design
- Cosmology and Gravitation Theories
- Advanced Semiconductor Detectors and Materials
- Quantum and electron transport phenomena
- Semiconductor Quantum Structures and Devices
- Photonic and Optical Devices
- Advanced MEMS and NEMS Technologies
- Quantum Information and Cryptography
- Magnetic Field Sensors Techniques
- Antenna Design and Optimization
- Terahertz technology and applications
- Superconducting Materials and Applications
- Nuclear Physics and Applications
- 3D IC and TSV technologies
- CCD and CMOS Imaging Sensors
- Thermal Radiation and Cooling Technologies
- Infrared Target Detection Methodologies
- Particle accelerators and beam dynamics
Korea Astronomy and Space Science Institute
2024
Saitama University
2015-2024
Tohoku University
2024
Fuji Oil (Japan)
2023
Kyoto University
2020
Delft University of Technology
2020
Nitto RIKEN (Japan)
2018
McGill University
2016
The University of Tokyo
2009-2016
The Graduate University for Advanced Studies, SOKENDAI
2016
Surugamides A-E (1-5), cyclic octapeptides with four D-amino acid residues, were isolated from the broth of marine-derived Streptomyces sp. Their planar structures determined by analyses spectroscopic data, and absolute configuration constituent amino residues was Marfey's method. Differentiation D-Ile L-Ile in sequence established chiral analysis fragment peptides obtained partial hydrolysate, whose identification conducted LC-MS/MS.
Terahertz spectrometers with a wide instantaneous frequency coverage for passive remote sensing are enormously attractive many terahertz applications, such as astronomy, atmospheric science, and security. Here we demonstrate wide-band spectrometer based on single superconducting chip. The chip consists of an antenna coupled to transmission line filterbank, microwave kinetic inductance detector behind each filter. Using division multiplexing, all detectors read-out simultaneously, creating...
LiteBIRD is a next generation satellite aiming for the detection of Cosmic Microwave Background (CMB) B-mode polarization imprinted by primordial gravitational waves generated in era inflationary universe. The science goal to measure tensor-to-scaler ratio r with precision δr < 10<sup>-3</sup>♦, offering us crucial test major large-single-field slow-roll inflation models. planned conduct an all sky survey at sun-earth second Lagrange point (L2) angular resolution about 0.5...
We have developed 220 and 440-GHz cameras using microwave kinetic inductance detectors (MKIDs) for astronomical observations. The optical system of the MKID camera is based on double-slot antennas extended hemispherical silicon lens arrays. diameter three times target wavelength. 220-GHz 9 pixels 102 pixels, respectively. array has been directly machined a high-speed spindle an ultra-precision machine. shape fabrication error surface roughness top were typically less than 10 μm...
We have been developing a terahertz camera based on antenna-coupled superconducting resonators, the so-called microwave kinetic inductance detectors (MKIDs), and silicon lens array. The MKID consists of coplanar waveguide coupled to double slot antenna is patterned high-quality aluminum film grown by molecular beam epitaxy. sensitive at frequencies 200-240 GHz. Its bandwidth limited impedance properties antenna. design, fabrication, optical evaluations planar antennas arrays are presented in...
A broadband antireflective subwavelength structure was developed suitable for large diameter silicon or alumina lenses used in the optical systems of superconducting cameras. In this study, a that can be easily fabricated with dicing blade designed. The model comprised both pyramidal section (550 μm depth) and straight (150 to simplify fabrication metal bonded V-shaped normal dicing-blade. simulated transmittance between 97 334 GHz >90%, which is comparable 700-μm-depth tapered structure. on...
The Mattis-Bardeen theory for the anomalous skin effect in superconductors has been extended taking complex gap energy into account and surface impedance of calculated using theory. It is found that resistance superconductor increases with increasing magnitude imaginary part energy. demonstrated a NbN film quantitatively agrees measured one. Itis also temperature dependence Q values super conducting resonators well describedby those by equation.
The surface impedance of a superconductor has been calculated using the extended Mattis-Bardeen theory, in which complex gap energy are taken into account. It is found that resistance increases with increasing magnitude imaginary part energy. also an NbN film by equation quantitatively agrees well measured one. shown temperature dependence not only values but residual numbers quasiparticles superconducting resonators agree those equation. phonon-assisted gradual relaxation excess passing...
We have developed an optics for 220 GHz observations, which is a compact cold re-imaging one from telescope focal plane, with F/# = 6 to detector plane 1 at 100 mK. It employs two high refractive lenses, purity alumina (n=3.1) and silicon (n=3.4). To reduce the incident stray light into detector, nested baffle composed of four reflectors same spherical shape has been developed. The power simulated be 0.2 μW corresponds quarter that without-baffles case. total transmittance three kinds IR...
We demonstrate a design of octave-band circular waveguide coupled planar ortho-mode transducer (OMT) with Microwave Kinetic Inductance Detector (MKID) for LiteBIRD mission, small-size satellite cosmic microwave background (CMB) polarization signal full-sky mapping. In our 4-pixel prototype design, each single pixel is sensitive to two frequency bands (90 GHz and 150 GHz) corresponding atmospheric window. Silicon on insulator (SOI) has been selected OMT structure broadband coplanar (CPW)...