Monochromatic-Tunable Terahertz-Wave Sources Based on Nonlinear Frequency Conversion Using Lithium Niobate Crystal

We review widely tunable terahertz (THz)-wave generation by optical parametric processes using lithium niobate crystal. Applying the parametric oscillation of LiNbO_{3} or a MgOdoped LiNbO_{3} crystal pumped by a nanosecond Q-switched Nd:YAG laser, we realized coherent THz-wave sources with a simple configuration widely tunable in the range of 0.7–3 THz. For efficient coupling of the THz wave, we used a monolithic grating coupler or a Si-prism array coupler. In addition, Fourier transform limited THz-wave spectrum narrowing was achieved by introducing the injection seeding method. A line width of about 100 MHz (0.003 cm^{−1} ) was assured by measuring the absorption spectrum of low-pressure water vapor. Using the difference frequency generating method with a periodically poled LiNbO_{3} crystal, we achieved higher conversion efficiency and realized continuous THz-wave generation. This room temperature operated, tabletop system promises to be a widely tunable THz-wave source suited to a variety of applications.journal articl

ピエール・ボエスチュオー研究（５） 『驚異の物語集』１

application/pdf大阪府立大学紀要（人文・社会科学）. 2020, 68, P.1-19departmental bulletin pape

The Characteristics of Unified Educational Activities from Kindergarten and to Early Secondary Revels in order to Foster Each Child's Abilites to Relate to Others and Things (Part3) : Focusing on Educational Activities peculiar to the Schools Attached to University

departmental bulletin pape

The Characteristics of Unified Educational Activities from Kindergarten and to Early Secondary Revels in order to Foster Each Child's Abilites to Relate to Others and Things (Part5) : Focusing on Basic Educational Activities : Play(Kindergaeten), Subjects and Teaching Practice

departmental bulletin pape

The Characteristics of Unified Educational Activities from Kindergarten and to Early Secondary Revels in order to Foster Each Child's Abilites to Relate to Others and Things (Part2) : Focusing on Extra-Curricular Activities based on the Same Objectives

departmental bulletin pape

塗布法を用いた波長選択型有機光電変換素子

Organic image sensor have been attracting considerable attention for sensing applications owing toseveral special characteristics compared to semiconductor materials, such as high absorption coefficient, flexibility, stacked structure, and low fabrication cost. By now, our research group reported a color selective organic photoconductive device via a wet process. In this report, we investigated optical characteristics of a blue-sensitive organic photoconductive device by doping several silole derivatives to improve a device performance. We used poly(dioctylfluorenyl-co-benzo-thiadiazole) [F8BT] as a photoconductive and blue sensitive polymer because of its high carrier mobility and absorption coefficient. Most of silole derivatives showed only the absorption bands at blue or violet wavelength regions. Therefore, silole derivative is found to be suitable material for a blue-sensitive organic photoconductive device. A maximum external quantum efficiency of 8.9% was obtained by doping 1,1-dimethyl-2,5-bis(N,N-dimethylaminophenyl)-3,4-diphenylsilole in F8BT. This value was two orders higher than that of the reference device with F8BT only.textapplication/pdfdepartmental bulletin pape

Evidence for Muon Neutrino Oscillation in an Accelerator-Based Experiment

journal articl

Light effect on the photoperiodic regulation of flowering

奈良先端科学技術大学院大学博士(バイオサイエンス)doctoral thesi

原始的な花粉媒介システムにおける訪花者と果実食者の比較群集学的研究

application/pdf果樹アテモヤに訪花する甲虫類の群集構成を調査するとともに、アテモヤまたはその近縁種チェリモヤを始めとする果物をトラップとして調査した。訪花者および実食者群集の組成にはその調査場所の地理的条件が影響し、その場所の果実食昆虫群集の一部がアテモヤに訪花したと考えられた。三重県御浜町に於いては訪花者群集に近いのはチャリモヤの果実の群集であり、石垣市ではアテモヤとバナナのものであった。花香は♀ステージの段階では甲虫に対して誘引力があったが、♂ステージになった後では誘引力はなかった。平成18~20年度科学研究費補助金(基盤研究(C))研究成果報告書18580052research repor

東京都現存植生図

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