Generation of intense ultrashort midinfrared pulses by laser-plasma interaction in the bubble regime

Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/52759

Title:	Generation of intense ultrashort midinfrared pulses by laser-plasma interaction in the bubble regime
Authors:	Pai,CH;Chang,YY;Ha,LC;Xie,ZH;Lin,MW;Lin,JM;Chen,YM;Tsaur,G;Chu,HH;Chen,SH;Lin,JY;Wang,J;Chen,SY
Contributors:	物理學系
Keywords:	ELECTRON-BEAMS;QUALITY;OPTICS
Date:	2010
Issue Date:	2012-06-11 10:43:01 (UTC+8)
Publisher:	國立中央大學
Abstract:	As an intense laser pulse propagates through an underdense plasma, the strong ponderomotive force pushes away the electrons and produces a trailing plasma bubble. In the meantime the pulse itself undergoes extreme nonlinear evolution that results in strong spectral broadening toward the long-wavelength side. By experiment we demonstrate that this process can be utilized to generate ultrashort midinfrared pulses with an energy three orders of magnitude larger than that produced by crystal-based nonlinear optics. The infrared pulse is encapsulated in the bubble before exiting the plasma, hence is not absorbed by the plasma. The process is analyzed experimentally with laser-plasma tomographic measurements and numerically with three-dimensional particle-in-cell simulation. Good agreement is found between theoretical estimation, numerical simulation, and experimental results.
Relation:	PHYSICAL REVIEW A
Appears in Collections:	[Department of Physics] journal & Dissertation

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