TY - JOUR AU - Wahlstrand, Jared AU - Zahedpour, Sina AU - Bahl, Anand AU - Kolesik, Miroslav AU - Milchberg, H C2 - Physical Review Letters DA - 2018-05-02 DO - https://doi.org/10.1103/PhysRevLett.120.183901 LA - en M1 - 120 PB - Physical Review Letters PY - 2018 TI - Bound electron nonlinearity beyond the ionization threshold ER -