Development of high power THz source using phase control technique

利用相位控制技术开发高功率太赫兹源

• 批准号: 20340159
• 负责人: YUGAMI Noboru
• 金额: $ 11.4万
• 依托单位: Utsunomiya University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2008
• 资助国家: 日本
• 起止时间: 2008 至 2010
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-20340159/
• 关键词: チャープ; テラヘルツ; 電離面; DARC; フラッシュ電離; プラズマ

We have demonstrated that the phase-controlled terahertz radiation can be generate by the burst current produced by a laser created ionization front, which is induced an optical-field-induced ionization (OFI) in air with a pulsed electric field. The peak frequency of the radiation spectrum depends on the rise time of the OFI. The central frequencies of the radiation were observed to be 0.3 and 0.1 THz at the pulse durations of 30 and 100 fs (FWHM), respectively. We also have demonstrated the proof-of-principle experiment of flash ionization scheme using the interaction between a terahertz wave and plasmas created by an ultrashort laser pulse. When plasmas were instantaneously created around an electromagnetic wave, frequency of the wave up-converted to the frequency, which depended on the plasma frequency. We observed frequency up-conversion from 0.35 THz to 3 THz by the irradiance of the laser in ZnSe crystal.

我们已经证明了相位控制的太赫兹辐射可以由激光产生的电离前沿产生的突发电流产生，该电离前沿在脉冲电场的诱导下在空气中产生光场诱导电离（OFI）。辐射谱的峰值频率取决于OFI的上升时间。在脉冲持续时间为30和100 fs （FWHM）时，辐射的中心频率分别为0.3和0.1 THz。我们还演示了利用超短激光脉冲产生的太赫兹波与等离子体相互作用的闪离方案的原理验证实验。当等离子体在电磁波周围瞬间产生时，电磁波的频率向上转换为频率，这取决于等离子体的频率。我们观察到激光在ZnSe晶体中的辐照频率从0.35 THz上升到3 THz。

项目成果

Compression of an ultrashort laser pulse via self-modulation in argon gas

在氩气中通过自调制压缩超短激光脉冲

• 发表时间: 2009
• 作者: Takeshi Higashiguchi;et al.
• 通讯作者: et al.

Compression of An Ultrashort Laser Pulse via Self-Phase Modulation in An Argon Channel

在氩通道中通过自相位调制压缩超短激光脉冲

• 发表时间: 2009
• 期刊: AIP Conference Proceedings 1086
• 作者: M. Kudo;T. Higashiguchi;N. Yugami
• 通讯作者: N. Yugami

超短パルスレーザー駆動パルス放電によるテラヘルツ放射

超短激光驱动脉冲放电的太赫兹辐射

• 发表时间: 2010
• 作者: Takeshi Higashiguchi;et al.;湯上登,仲田真大,大塚崇光,鈴木史典,笠間純一,東口武史,千徳靖彦,兒玉了祐;東口武史,柏崎宏明,大塚崇光,宮澤準,大場貴文,鈴木光騎,湯上登,千徳靖彦,兒玉了祐
• 通讯作者: 東口武史,柏崎宏明,大塚崇光,宮澤準,大場貴文,鈴木光騎,湯上登,千徳靖彦,兒玉了祐

大気中を長尺伝搬する超短パルスレーザースペクトルのレッドシフトの観測

大气中长距离传播的超短脉冲激光光谱红移观测

• 发表时间: 2010
• 作者: 大塚崇光;他
• 通讯作者: 他

Characteristics of red-shift of the ultrashort laser spectrum in air

空气中超短激光光谱红移特性

• 发表时间: 2009
• 作者: Takamitsu Otsuka;et al.
• 通讯作者: et al.