@article{oai:repo.qst.go.jp:00081149, author = {Valenta, P. and Timur, Esirkepov and Kevin Koga, James and Necas, A. and M. Grittani, G. and M. Lazzarini, C. and Klimo, O. and Korn, G. and Bulanov, Sergey and Timur, Esirkepov and Kevin Koga, James and Bulanov, Sergey}, journal = {Physical Review E}, month = {Nov}, note = {With analytical calculations and computer simulations, we show that the properties of wakefield excited by an ultrashort laser pulse in high-density plasmas are determined by the effects of dispersion and carrier-envelope phase shift of the driving pulse. The main observed feature is a periodic long-wavelength modulation of the wakefield amplitude. The results obtained are important, e.g., for the enhancement of the quality of electron beams accelerated via laser-wakefield mechanism under the conditions relevant to high-repetition-rate laser systems.}, title = {Polarity reversal of wakefields driven by ultrashort pulse laser}, volume = {102}, year = {2020} }