研究・研究者
研究会・セミナー
| 演 題 | 「Ultrafast coherent transfer of angular momentum by tuning the envelope of a light pulse」 |
|---|---|
| 日 時 | 2013年02月08日(金) 11:00 |
| 講演者 | 樋口 卓也（東京大学理学系研究科物理学専攻 特任研究員） |
| 場 所 | 分子科学研究所 研究棟2階 201セミナー室 |
| 概 要 |
In this Presentation, we discuss a general approach to control low-energy rotational excitations by impulsive stimulated Raman scattering (ISRS). ISRS is free from thermalization, because the scattered light carries away the excess energy. For such process, a femtosecond pulse is often employed for its broadband spectrum that covers the needed frequencies in a single pulse. However, a design for a continuous spectrum in nonlinear process usually imposes a complex analysis of the electromagnetic and material parameters. Here, we theoretically show that the temporal trajectory of the envelope of electromagnetic-field vector enables us to intuitively interpret ISRS experiments and to optimize the controlling laser pulse. To describe the envelope of a light pulse, we introduce instantaneous Stokes parameters (ISP) under the slowly varying envelope approximation. |
| お問合せ先 | 鹿野 豊・大森賢治 |
