Topological lightwave synthesis based on plasma hologram

基于等离子体全息图的拓扑光波合成

• 批准号: 23656041
• 负责人: OMATSU Takashige
• 金额: $ 2.5万
• 依托单位: Chiba University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Challenging Exploratory Research
• 财政年份: 2011
• 资助国家: 日本
• 起止时间: 2011 至 2012
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-23656041/
• 关键词: レーザー; 非線形光学; 特異点光学; プラズマ光学; 高強度レーザー

We performed forward four-wave mixing in plasma created by highly intense optical vortex, so as to transfer the total angular momentum of the optical vortex to the diffracted beam. A laser used was a picosecond Nd:YAG laser (wavelength : 1064nm, pulse width : 20ps, pulse energy : 1~5mJ), and its output was converted to optical vortex with a total angular momentum of 1 by a spiral phase plate. The optical vortex and its reference pulses were spatially overlapped on a target silica glass, thereby forming the plasma grating. Self-diffracted output with an annular intensity profile was then observed. Furthermore, self-diffracted output energy was almost proportional to the cube of the optical vortex energy. These results evidenced that the total angular momentum was transferred from the optical vortex to the diffracted output through four-wave mixing process in plasma grating.

我们在高强度光学涡旋产生的等离子体中进行前向四波混频，从而将光学涡旋的总角动量传递给衍射光束。使用的激光为皮秒Nd:YAG激光(波长：1064nm，脉冲宽度：20ps，脉冲能量：1~5mJ)，其输出通过螺旋相位板转换为总角动量为1的光学涡旋。光学涡流及其参考脉冲在目标石英玻璃上空间重叠，从而形成等离子体光栅。然后观察到具有环形强度分布的自衍射输出。此外，自衍射输出能量几乎与光学涡旋能量的立方成正比。这些结果证明总角动量通过等离子体光栅中的四波混合过程从光学涡旋转移到衍射输出。

项目成果

Dual-frequency picosecond optical parametric generator pumped by a Nd-doped vanadate bounce laser

掺钕钒酸盐反射激光器泵浦的双频皮秒光参量发生器

• 发表时间: 2011
• 作者: Masaki Koichi; Shuto Ujita; Takefumi Saito; Katsuhiko Miyamoto; Takashige Omatsu
• 通讯作者: Takashige Omatsu

High power neodymium-doped mixedvanadate bounce geometry laser, modelocked with nonlinear mirror

高功率掺钕混合钒酸盐反射几何激光器，采用非线性镜锁模

• 发表时间: 2012
• 作者: Gabrielle M. Thomas; Takashige Omatsu; Michael J. Damzen
• 通讯作者: Michael J. Damzen

Nanosecond vortex laser pulses withmillijoule pulse energies from an Yb-doped double-clad fiber power amplifier

来自掺镱双包层光纤功率放大器的纳秒涡旋激光脉冲，具有毫焦耳脉冲能量

• 发表时间: 2011
• 作者: Mio Koyama; Hirose Tetsuya; Masahito Okida; Katsuhiko Miyamoto; Takashige Omatsu
• 通讯作者: Takashige Omatsu

光の角運動量によるナノ構造体のカイラリティー・マニピュレーション

利用光的角动量控制纳米结构的手性

• 发表时间: 2013
• 作者: 尾松孝茂

光波のヘリシティーによる物質のカイラル構造制御

通过光波的螺旋性控制材料的手性结构

• 发表时间: 2013
• 作者: 尾松孝茂