Search Results - "Hara, Kazuhiko"

Optimization of capacitively coupled Low Gain Avalanche Diode (AC-LGAD) sensors for precise time and spatial resolution by Kita, Sayuka, Nakamura, Koji, Ueda, Tatsuki, Goya, Ikumi, Hara, Kazuhiko

“…Capacitively-coupled Low-Gain Avalanche Diode (AC-LGAD) sensors are being developed for high-energy particle physics experiments as a detector which provides…”
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Thickness Dependence on Wavelength Range of Random Laser in Ultrathin ZnO Crystals Grown by Mist-CVD on C -plane Sapphire Substrate by Iwata, Junichi, Sakai, Masaru, Syouji, Atsushi, Hara, Kazuhiko, Kouno, Tetsuya

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Study of time resolution of low-gain avalanche detectors by Onaru, Kyoji, Hara, Kazuhiko, Harada, Daigo, Wada, Sayaka, Nakamura, Koji, Unno, Yoshinobu

“…A Low Gain Avalanche Diode (LGAD) is a semiconductor device that amplifies signals inside a sensor, using an avalanche mechanism. As the charge multiplication…”
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Photoluminescence properties and random lasing behaviors of mist-CVD-grown ZnO disordered nanocrystals on c-plane sapphire substrate by Iwata, Junichi, Sakai, Masaru, Ohashi, Kosei, Hara, Kazuhiko, Kouno, Tetsuya

“…We fabricated ZnO disordered nanocrystals on a c-plane sapphire substrate by mist chemical vapor deposition (mist-CVD). Grown ZnO disordered nanocrystals were…”
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Quantum Cone-A Nano-Source of Light with Dispersive Spectrum Distributed along Height and in Time by Medvids, Arturs, Ščajev, Patrik, Hara, Kazuhiko

“…We study a quantum cone, a novel structure composed of multiple quantum dots with gradually decreasing diameters from the base to the top. The dot distribution…”
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Visualizing hidden electron trap levels in Gd3Al2Ga3O12:Ce crystals using a mid-infrared free-electron laser by Kitaura, Mamoru, Zen, Heishun, Kamada, Kei, Kurosawa, Shunsuke, Watanabe, Shinta, Ohnishi, Akimasa, Hara, Kazuhiko

“…The energy levels of electron traps (namely, defect complexes associated with oxygen vacancies) in Gd3Al2Ga3O12:Ce (GAGG:Ce) were studied at 12 K using…”
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Shallow electron traps formed by Gd2+ ions adjacent to oxygen vacancies in cerium-doped Gd3Al2Ga3O12 crystals by Kitaura, Mamoru, Watanabe, Shinta, Kamada, Kei, Jin Kim, Kyoung, Yoshino, Masao, Kurosawa, Shunsuke, Yagihashi, Toru, Ohnishi, Akimasa, Hara, Kazuhiko

“…To clarify the origin of shallow electron traps in cerium-doped Gd3Al2Ga3O12 (Ce:GAGG), the optical properties of cerium-doped Lu3−xGdxAl2Ga3O12 crystals were…”
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Deep Red Photoluminescence from Cr3+ in Fluorine-Doped Lithium Aluminate Host Material by Kamada, Yuki, Hayasaka, Ryusei, Uchida, Kento, Suzuki, Taisei, Takei, Takahiro, Kitaura, Mamoru, Kominami, Hiroko, Hara, Kazuhiko, Matsushima, Yuta

“…Deep red phosphors have attracted much attention for their applications in lighting, medical diagnosis, health monitoring, agriculture, etc. A new phosphor…”
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Quantum Prism-Nano Source of Light with Dispersive Spectrum and Optical Upconversion by Medvids, Arturs, Ščajev, Patrik, Miasojedovas, Saulius, Hara, Kazuhiko

“…A quantum prism, a new structure, consisting of many quantum wires with a diameter that gradually decreases from the base to the top, is the focus of our…”
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Sensing operations based on hexagonal GaN microdisks acting as whispering-gallery mode optical microcavities by Kouno, Tetsuya, Sakai, Masaru, Kishino, Katsumi, Hara, Kazuhiko

“…Using room temperature photoluminescence measurements, we have demonstrated a sensing operation based on hexagonal GaN microdisks with a side length of…”
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Lasing action of ZnO nanowires grown by mist chemical vapor deposition using thin Au layer on c-plane sapphire substrate by Nakahara, Ryota, Sakai, Masaru, Kimura, Taiki, Yamamoto, Mikihiro, Syouji, Atsushi, Hara, Kazuhiko, Kouno, Tetsuya

“…Abstract ZnO nanowires were grown by mist chemical vapor deposition at a growth temperature of approximately 900 °C (tube furnace temperature) on a c -plane…”
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Fe3+ red phosphors based on lithium aluminates and an aluminum lithium oxyfluoride prepared from LiF as the Li Source by Takahashi, Hide-aki, Takahashi, Hirotaka, Watanabe, Keisuke, Kominami, Hiroko, Hara, Kazuhiko, Matsushima, Yuta

“…LiF was used as the Li source to prepare Fe3+ red phosphors based on lithium aluminates and an aluminum lithium oxyfluoride. LiF led to the three types of the…”
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Room-temperature intrinsic excitonic luminescence from a hexagonal boron nitride thin film grown on a sapphire substrate by low-pressure chemical vapor deposition using BCl3 as a boron source by Umehara, Naoki, Adachi, Takurou, Masuda, Atsushi, Kouno, Tetsuya, Kominami, Hiroko, Hara, Kazuhiko

“…A hexagonal boron nitride thin film was prepared on a c-plane sapphire substrate at a substrate temperature of 1200 °C and a reactor pressure of 5 kPa by…”
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ZnO-based nanowires grown by mist chemical vapor deposition on GaN layer using thin Au layer by Yamamoto, Mikihiro, Nakahara, Ryota, Kimura, Taiki, Ohashi, Kosei, Fujiwara, Kenya, Hara, Kazuhiko, Kouno, Tetsuya

“…ZnO and MgZnO nanowires were grown by mist chemical vapor deposition at a high growth temperature of approximately 950 °C-960 °C on a c-plane GaN layer…”
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Radiation hardness of silicon-on-insulator pixel devices by Hara, Kazuhiko, Aoyagi, Wataru, Sekigawa, Daisuke, Iwanami, Shikie, Honda, Shunsuke, Tsuboyama, Toru, Arai, Yasuo, Kurachi, Ikuo, Miyoshi, Toshinobu, Yamada, Miho, Ikegami, Yoichi

“…Silicon-on-Insulator (SOI) CMOS is an attractive technology because of pixel sensor applications for its inherent advantages such as superior isolation of each…”
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Energy location of Ce3+ 4f level and majority carrier type in Gd3Al2Ga3O12:Ce crystals studied by surface photovoltage spectroscopy by Kitaura, Mamoru, Azuma, Junpei, Ishizaki, Manabu, Kamada, Kei, Kurosawa, Shunsuke, Watanabe, Shinta, Ohnishi, Akimasa, Hara, Kazuhiko

“…Gd3Al2Ga3O12:Ce (GAGG:Ce) was studied by surface photovoltage spectroscopy using the ultraviolet photoelectron spectroscopy technique with synchrotron…”
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Evaluation of characteristics of Hamamatsu low-gain avalanche detectors by Wada, Sayaka, Ohnaru, Kyoji, Hara, Kazuhiko, Suzuki, Junki, Unno, Yoshinobu, Nakamura, Koji, Hanagaki, Kazunori, Ikegami, Yoichi, Yamamura, Kazuhisa, Kamada, Shintaro, Abo, Yuhei, Tokutake, Hitomi, Yamamoto, Daiki

“…Low-gain avalanche detectors (LGADs) are attractive because of their fast response to realize a 4-dimensional (4D) tracker in future experiments in high energy…”
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Investigation of radiation hardness improvement by applying back-gate bias for FD-SOI MOSFETs by Kurachi, Ikuo, Kobayashi, Kazuo, Okihara, Masao, Kasai, Hiroki, Hatsui, Takaki, Hara, Kazuhiko, Miyoshi, Toshinobu, Arai, Yasuo

“…Radiation hardness improvement of fully depleted silicon on insulator (FD-SOI) metal-oxide-silicon field effect transistors (MOSFETs) has been investigated in…”
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Development of a monolithic pixel sensor based on SOI technology for the ILC vertex detector by Ono, Shun, Yamada, Miho, Togawa, Manabu, Arai, Yasuo, Tsuboyama, Toru, Kurachi, Ikuo, Ikegami, Yoichi, Hara, Kazuhiko, Li, Taohan, Ishikawa, Akimasa

“…SOI detector SOFIST is a pixel sensor optimized for the International Linear Collider vertex detector. SOFIST stores both position and timing information of…”
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Electronic Structure Calculation of Cr3+ and Fe3+ in Phosphor Host Materials Based on Relaxed Structures by Molecular Dynamics Simulation by Ichikawa, Joichiro, Kominami, Hiroko, Hara, Kazuhiko, Kakihana, Masato, Matsushima, Yuta

“…The electronic structures of the luminescent center ions Cr3+ and Fe3+ in the deep red phosphors LiAl5O8:Cr3+, α-Al2O3:Cr3+, and γ-LiAlO2:Fe3+ were calculated…”
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