TY - GEN
T1 - Attosecond nonlinear optics in plasmas for coherent x-ray generation
AU - Zhang, Xiaoshi
AU - Lytle, Amy L.
AU - Cohen, Oren
AU - Gaudiosi, David M.
AU - Popmintchev, Tenio
AU - Paul, Ariel
AU - Murnane, Margaret M.
AU - Kapteyn, Henry C.
AU - Reagan, Brendan
AU - Grisham, Mike
AU - Rocca, Jorge J.
PY - 2007
Y1 - 2007
N2 - The process of high-order harmonic generation (HHG) can be used to generate bright, coherent beams of light in the extreme-ultraviolet and soft x-ray region of the spectrum by upconverting intense femtosecond pulses to very short wavelengths. These high-order harmonics result from ionization of the gas used as a nonlinear medium; thus, a full understanding of the process involves incorporating atomic physics, quantum dynamics, and plasma physics into an already non-trivial nonlinear optics problem. In the past several years, we have developed a new technology of "extreme" nonlinear optics that uses the rich, attosecond time-scale physics of the process in novel ways to manipulate the characteristics of this source, improving both the flux and the spectral characteristics. Most recently, we have (1) demonstrated that quasi phase matching of the high-order harmonic conversion process can be accomplished by the use of weak counterpropagating pulse trains that modulate the conversion process, constituting a nonlinear-optical "crystal" made of light; and (2) we have demonstrated that high-order harmonics can be generated by ionization of ions in a guided-wave geometry, using a discharge- created plasma waveguide to pre-ionize the gas and form a guiding electron density profile.
AB - The process of high-order harmonic generation (HHG) can be used to generate bright, coherent beams of light in the extreme-ultraviolet and soft x-ray region of the spectrum by upconverting intense femtosecond pulses to very short wavelengths. These high-order harmonics result from ionization of the gas used as a nonlinear medium; thus, a full understanding of the process involves incorporating atomic physics, quantum dynamics, and plasma physics into an already non-trivial nonlinear optics problem. In the past several years, we have developed a new technology of "extreme" nonlinear optics that uses the rich, attosecond time-scale physics of the process in novel ways to manipulate the characteristics of this source, improving both the flux and the spectral characteristics. Most recently, we have (1) demonstrated that quasi phase matching of the high-order harmonic conversion process can be accomplished by the use of weak counterpropagating pulse trains that modulate the conversion process, constituting a nonlinear-optical "crystal" made of light; and (2) we have demonstrated that high-order harmonics can be generated by ionization of ions in a guided-wave geometry, using a discharge- created plasma waveguide to pre-ionize the gas and form a guiding electron density profile.
UR - http://www.scopus.com/inward/record.url?scp=77958017261&partnerID=8YFLogxK
U2 - 10.1063/1.2768845
DO - 10.1063/1.2768845
M3 - 会议稿件
AN - SCOPUS:77958017261
SN - 9780735404366
T3 - AIP Conference Proceedings
SP - 145
EP - 148
BT - Atomic Processes in Plasmas - 15th International Conference on Atomic Processes in Plasmas, APiP
T2 - 15th International Conference on Atomic Processes in Plasmas, APiP
Y2 - 19 March 2007 through 22 March 2007
ER -