Details

Autor(en) / Beteiligte

• Pirozhkov, A. S.
• Ma, J.
• Kando, M.
• Esirkepov, T. Zh
• Fukuda, Y.
• Chen, L.-M.
• Daito, I.
• Ogura, K.
• Homma, T.
• Hayashi, Y.
• Kotaki, H.
• Sagisaka, A.
• Mori, M.
• Koga, J. K.
• Kawachi, T.
• Daido, H.
• Bulanov, S. V.
• Kimura, T.
• Kato, Y.
• Tajima, T.

Titel

Frequency multiplication of light back-reflected from a relativistic wake wave

Ist Teil von

• Physics of plasmas, 2007-12, Vol.14 (12)

Ort / Verlag

United States

Erscheinungsjahr

2007

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• A method of coherent high-frequency electromagnetic radiation generation, proposed by Bulanov, Esirkepov, and Tajima [Phys. Rev. Lett. 91, 085001 (2003)], is experimentally demonstrated. This method is based on the radiation frequency multiplication during reflection at a mirror flying with relativistic velocity. The relativistic mirror is formed by the electron density modulations in a strongly nonlinear wake wave, excited in an underdense plasma in the wake behind an ultrashort laser pulse. In our experiments, the reflection of a countercrossing laser pulse from the wake wave is observed. The detected frequency multiplication factor is in the range from 55 to 114, corresponding to a reflected radiation wavelength from 7 to 15 nm . This may open a way towards tunable high-intensity sources of ultrashort coherent electromagnetic pulses in the extreme ultraviolet and x-ray spectral regions. Parameters of the reflecting wake wave can be determined using the reflected radiation as a probe.