Search Results 1-20 of 47

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  • Broadband Multi-cycle Frequency-chirped Terahertz pulse generation from PPLN  [in Japanese]

    浜崎 淳一 , 小川 洋 , 関根 徳彦 , 笠松 章史 , 菅野 敦史 , 山本 直克 , 寶迫 巌

    電子情報通信学会技術研究報告 = IEICE technical report : 信学技報 116(15), 13-17, 2016-04-21

  • New Progress of Ultraintense THz Pulse Generation Technology(Experimental Development)  [in Japanese]

    Hirori Hideki

    … の「テラヘルツ(THz)光」である.一般にテラヘルツ光というと,振動数0.1〜10THz(3.3〜333cm^<-1>),エネルギー0.4〜41meV,波長30μm〜3mm程度の電磁波をさす.フェムト秒レーザー光を非線形光学結晶や光伝導アンテナに照射するとテラヘルツ波パルスを発生することは,90年代から知られていた.非線形光学結晶を用いる発生法は,入射光(フェムト秒レーザーパルス)と発生光(THzパルス)の間で …

    Butsuri 71(1), 34-39, 2016

    J-STAGE 

  • Generation of Arbitrarily Patterned Pulse Trains in the THz Range by Spectral Synthesis of Optical Combs

    MOROHASHI Isao , SAKAMOTO Takahide , SEKINE Norihiko , KAWANISHI Tetsuya , KASAMATSU Akifumi , HOSAKO Iwao

    … We demonstrated generation of arbitrarily patterned optical pulse trains and frequency tunable terahertz (THz) pulses by spectral synthesis of optical combs generated by a Mach-Zehnder-modulator-based flat comb generator (MZ-FCG). … In our approach, THz pulses were generated by photomixing of a multi-tone signal, which is elongated pulse train, and a single-tone signal. …

    IEICE Transactions on Electronics E98.C(8), 793-798, 2015

    J-STAGE 

  • Development of Frequency-Tunable Narrowband Time-Domain Terahertz Wave Generation System

    SOURAV Roy , ZHANG Caihong , AVETISYAN Yuri , KAWAYAMA Iwao , MURAKAMI Hiro , TONOUCHI Masayoshi

    … In recent years, narrowband terahertz (THz) radiation along with broadband terahertz has attracted great deal of attention in both fundamental and applied sciences. … For many frequency specific applications, the tunability of both central frequency and bandwidth of the narrowband THz radiation is vital. …

    IEICE technical report. Electron devices 114(387), 27-31, 2014-12-22

  • Generation of Terahertz-waves using Ultrashort Electron Beams from a Photocathode Radio-frequency Gun Linac  [in Japanese]

    Kan Koichi , Yang Jinfeng , Ogata Atsushi , Kondoh Takafumi , Gohdo Masao , Shibata Hiromi , Yoshida Yoichi

    … Ultrashort, e.g., picosecond or femtosecond, electron beams are useful for electro-magnetic radiation production in terahertz (THz) range due to the inverse of 1 ps bunch length corresponding to the frequency of 1 THz. … The accelerated electron beams were compressed by a magnetic bunch compressor, resulting in femtosecond pulse width. …

    IEEJ Transactions on Electronics, Information and Systems 134(4), 502-509, 2014

    J-STAGE 

  • High-peak-power terahertz-wave generation and sensitive detection using nonlinear optical wavelength-conversion  [in Japanese]

    MINAMIDE Hiroaki

    … テラヘルツ波発生では、ニオブ酸リチウム結晶を用いてキロワット尖頭値を有するテラヘルツ波発生を実現し、一方テラヘルツ波を近赤外光に変換して100aJ/pulseの微小テラヘルツ波検出と約10桁のダイナミックレンジを有する高感度検出を実現した。 …

    IEICE technical report. Electron devices 113(357), 63-68, 2013-12-16

  • Enhancing the energy of terahertz radiation from plasma produced by intense femtosecond laser pulses

    Jahangiri Fazel , Hashida Masaki , Tokita Shigeki , Nagashima Takeshi , Hangyo Masanori , Sakabe Shuji

    Terahertz (THz) radiation from atomic clusters illuminated by intense femtosecond laser pulses is investigated. … By studying the angular distribution, polarization properties and energy dependence of THz waves, we aim to obtain a proper understanding of the mechanism of THz generation. … The properties of THz waves measured in this study differ from those predicted by previously proposed mechanisms. …

    Applied Physics Letters 102(19), 2013-05

    IR 

  • Nonlinear Optical Phenomena Induced by Intense Single-Cycle Terahertz Pulses

    Hirori Hideki , Tanaka Koichiro

    … Recent developments in high-power table-top terahertz (THz) pulse sources enable us to coherently drive low-energy transitions into the nonlinear regime and to study fascinating nonlinear effects in various materials. … This paper describes a tilted-pulse-front pumping scheme with a LiNbO$_{3}$ crystal to generate intense single-cycle THz pulses. …

    IEEE Journal of Selected Topics in Quantum Electronics 19(1), 2013-01

    IR 

  • Comparison between two-mode continuous-wave oscillation and mode-locked pulse oscillation as input light in THz-TDS  [in Japanese]

    KIMOTO Takuya , TAKEMOTO Naofumi , WADA Kenji , MATSUYAMA Tetsuya , HORINAKA Hiromichi

    電気学会研究会資料. LAV, 光応用・視覚研究会 2012(9), 17-20, 2012-08-01

    References (3)

  • High-Power Terahertz Pulse Generation and Nonlinear Terahertz Spectroscopy  [in Japanese]

    TANAKA Koichiro , HIRORI Hideki

    レーザー研究 40(7), 480-485, 2012-07-15

    References (38)

  • Nonlinear optical phenomena induced by intense terahertz pulses  [in Japanese]

    HIRORI Hideki , TANAKA Koichiro

    <p>本論文では,最近大きな進展のあったニオブ酸リチウムLiNbO<sub>3</sub>結晶を使った高強度テラヘルツパルスの発生法について詳述する.次に,テラヘルツ強電場が半導体多重量子井戸(ZnSe/ZnMgSSe)における励起子およびバンド間遷移による光吸収を大きく変調させる実験結果について述べる.さらに,1MV/cm程度のテラヘルツ強電場がGaAs多重量 …

    Oyo Buturi 81(4), 291-297, 2012-04-10

    J-STAGE  References (46)

  • Tunable terahertz-wave source based on DAST-DFG pumped by injection-seeded optical parametric generator  [in Japanese]

    Nawata Kouji , Notake Takashi , Kawatama Hiroshi , Matsukawa Takeshi , Qi Feng , Minamide Hiroaki

    … 開発した二波長励起光源では、出力パルスエネルギー2.5mJ、出力光スペクトル幅約0.03nmが得られ、これを励起光として用いた差周波テラヘルツ波発生において、周波数範囲1.3-9THzの広帯域テラヘルツ波発生を実現した。 …

    IEICE technical report. Electron devices 111(338), 91-94, 2011-12-14

  • Generation of Ultrabroadband Infrared Wave Ranging up to 200 THz by an Intense sub 10 fs pulse  [in Japanese]

    MATSUBARA Eiichi , NAGAI Masaya , ASHIDA Masaaki

    … 30THz (波長10μm)より高周波の成分は半導体光検出器と分光器の組み合わせで測定した.得られる帯域幅は,入射の基本波および第2高調波のパルス特性に依存することがわかった. …

    IEICE technical report. Electron devices 111(338), 85-89, 2011-12-14

  • Generation of Ultrabroadband Infrared Wave Ranging up to 200THz by an Intense sub 10fs pulse  [in Japanese]

    MATSUBARA Eiichi , NAGAI Masaya , ASHIDA Masaaki

    電子情報通信学会技術研究報告. ED, 電子デバイス 111(338), 85-89, 2011-12-07

    References (17)

  • Broadband and Highly Efficient Generation Technique of Monocycle Terahertz Electromagnetic Pulse in LiNbO_3  [in Japanese]

    NAGAI Masaya , TANAKA Koichiro

    … We introduce the contemporary scheme of high-power terahertz wave generation using tilted pulsefront …

    The Review of Laser Engineering 37(5), 350-354, 2009-05-15

    J-STAGE  References (20)

  • Generation of Terahertz Radiation via Laser Wakefield  [in Japanese]

    YUGAMI Noboru

    レーザー生成磁化プラズマからの電磁波放射を観測した.観測された電磁波は,周波数が最大200GHzであり,パルス幅は200psである.放射電磁波の強度は,印加磁場に比例した.電磁波の偏向も観測され,これらは,理論とよい一致をみている.発生電磁波の周波数は,理論と一致しないが,これは,レーザーによって生成されたプラズマコラム内部のイオン電場による電子振動を考えることによって説明される.

    Journal of plasma and fusion research 84(4), 209-212, 2008-04-25

    NDL Digital Collections  References (33)

  • Ultrafast repetition-rate optical clock generation based on optical spectrum synthesizer using attenuation and phase tunable arrayed waveguide grating  [in Japanese]

    Anzai Shimako , Komai Yuki , Mieno Mitsuko , Kodate Kashiko

    Journal of Japan Women's University. Faculty of science (16), 21-27, 2008-03

    IR 

  • High-sensitive THz-wave detection using nonlinear optical effect in MgO:LiNbO_3 at room temperature

    MINAMIDE Hiroaki , GUO Ruixiang , ITO Hiromasa

    これまで非線形光学結晶を用いた波長変換技術を高め,高性能な広帯域波長可変テラヘルツ波光源の開発を行ってきた.一方,テラヘルツ波領域では,検出技術が近接するマイクロ波や赤外線領域に比べ遅れをとっており,テラヘルツ波発生技術と比べると,研究開発は十分であるとは言えない.本報告では,非線形光学効果を利用し,常温で,かつ高感度にテラヘルツ波検出を行う方法を提案し,発生・検出ともに同様の実験系で実現した結果 …

    IEICE technical report 107(355), 83-88, 2007-11-20

    References (11)

  • Simulation study on cascaded terahertz pulse generation in electro-optic crystals

    HATTORI T. , Takeuchi Kousuke , 服部 利明

    … We studied cascaded optical rectification processes for intenseterahertz (THz) pulse generation in electro-optic crystals using simulationsbased on one-dimensional coupled propagation equations of THz and opticalfields. … Effects of finite optical andTHz absorption, phase mismatches, and pulse width were examined usingparameters of a ZnTe crystal pumped by 800 nm pulses. …

    Optics express 15(13), 8076-8093, 2007-06

    IR  Cited by (2)

  • Terahertz pulse generation from organic crystals by using various short pulse lasers  [in Japanese]

    TAKAHASHI Yoshinori , YOSHIMURA Masashi , MORI Yusuke , KITAOKA Yasuo , TONOUCHI Masayoshi , SASAKI Takatomo

    … 優れた非線形光学特性を有する有機イオン性材料4-dimethylamino-N-methyl-4-stilbazolium tosylate(DAST)の高品質結晶を育成し,波長の異なる3種の赤外フェムト秒レーザーを励起光源としてDAST結晶からのテラヘルツ(THz)波発生評価を実施し,群速度位相整合から振幅スペクトルの相違を議論する。 … また,結晶内のTHz波発生強度の面内分布を調べ,結晶品質について評価した。 …

    IEICE technical report 107(71), 35-40, 2007-05-18

    References (23)

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