Search Results:　 1-11 of 11

SADEGHI Nader

Optical diagnostics are between the most commonly used tools for the characterization of plasmas and for the better understanding of physical and chemical processes controlling their time and space de …

Journal of plasma and fusion research 80(9), 767-776, 2004-09-25

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YOSHII Yotsumi , KUZE Hiroaki , TAKEUCHI Nobuo

… We propose a new scheme of trace gas detection by the use of a Fabry-Perot cavity (FPC) and the wavelength modulation technique. … Optical propagation length is enhanced using a 25 cm FPC with a finesse of 〜100. … By applying the same modulation to both the laser and cavity frequency, we observe the first derivative signal of acetylene absorption at 1.5 μm. …

Japanese journal of applied physics. Pt. 1, Regular papers & short notes 41(9), 5585-5589, 2002-09-15

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YONEMARU Masao , KIKUCHI Akihiko , KISHINO Katsumi

共振型受光素子は薄膜吸収層において高い受光感度と優れた波長選択性を実現する。本研究ではrfプラズマにより励起した窒素ガスを原料とする分子線エピタキシー法(RF-MBE)によりAlGaN系共振型紫外線受光素子を作製した。MOCVD-GaNをテンプレートとせず、サファイア基板上に素子構造を成長することで受光特性の改善に成功した。暗電流は印加電圧5Vにおいて66pAであった。共振効果による明瞭なピークが …

IEICE technical report. Electron devices 102(116), 9-12, 2002-06-08

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