We discover that different high harmonics have a significantly different wavefront curvature. This results in spatial and temporal chirp of attosecond pulses. We consider an implications of these findings on attosecond science and technology.
© 2011 OSA
(120.5050) Instrumentation, measurement, and metrology : Phase measurement
(260.1960) Physical optics : Diffraction theory
(020.2649) Atomic and molecular physics : Strong field laser physics
E. Frumker, G. G. Paulus, D. M. Villeneuve, and P. B. Corkum, "Order-dependent wavefront structure of high harmonic radiation," in CLEO:2011 - Laser Applications to Photonic Applications, OSA Technical Digest (CD) (Optical Society of America, 2011), paper QMC7.