PT Journal AU Morgner, U Ell, R Metzler, G Schibli, T Kaertner, FX Fujimoto, JG Haus, HA Ippen, EP TI Nonlinear optics with phase-controlled pulses in the sub-two-cycle regime SO Physical Review Letters PY 2001 BP 5462 EP 5465 VL 86 IS 24 DI 10.1103/PhysRevLett.86.5462 LA english ER