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Transient-reflection spectroscopy of laser-plasma formation on solid and liquid surfaces
https://repo.qst.go.jp/records/84865
https://repo.qst.go.jp/records/84865d2386b5d-266e-4ed3-95ef-ebd3ab897453
| Item type | 会議発表用資料 / Presentation(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2022-01-31 | |||||
| タイトル | ||||||
| タイトル | Transient-reflection spectroscopy of laser-plasma formation on solid and liquid surfaces | |||||
| 言語 | ||||||
| 言語 | eng | |||||
| 資源タイプ | ||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_c94f | |||||
| 資源タイプ | conference object | |||||
| アクセス権 | ||||||
| アクセス権 | metadata only access | |||||
| アクセス権URI | http://purl.org/coar/access_right/c_14cb | |||||
| 著者 |
ITAKURA, Ryuji
× ITAKURA, Ryuji× Ryuji, Itakura |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | We investigate ultrafast dynamics of laser-plasma formation by measuring transient reflection from a PM formed by an intense laser pulse. Transient reflectivity measurement enables us to visualize spatial dynamics of ablating surfaces. The spallation in excited fused silica (FS) and organic polymers is clearly identified from a temporal oscillation lasting for longer than 500 ps with a period of several tens of picoseconds. The surface expansion and densification in the outer region of an ablating hole are also suggested by the spatial dependence of the transient reflectivity measurement. Using UV and VUV pulses, we measure the increase in reflectivity of the excited FS and water liquid sheet surfaces. On the basis of the Drude model, it is suggested that the electron density increases to the level of 10^{22} cm^{-3}. The spectrum measurement of the transient reflection provides more exact time-dependent reflectivity including phase through the cross-correlation type frequency-resolve optical gating analysis. |
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| 会議概要（会議名, 開催地, 会期, 主催者等） | ||||||
| 内容記述タイプ | Other | |||||
| 内容記述 | 4th Asian symposium on Intense Laser Science (ASILS) online seminar | |||||
| 発表年月日 | ||||||
| 日付 | 2022-02-11 | |||||
| 日付タイプ | Issued | |||||
