Subfemtosecond electron bunch generation by a tightly focused laser pulse Masuda, S. ; Nakajima, K. ; Kando, M. ; Kotaki, H. ; Koyama, K. ; Miura, E. ; Kato, S. ; Adachi, M. ; Watanabe, T. Abstract Publication: Journal of Plasma Physics Pub Date: December 2006 DOI: 10.1017/S002237780600554X Bibcode: 2006JPlPh..72.1277M