title: Controlling attosecond angular streaking with second harmonic radiation.
abstract: High harmonic generation, which produces a coherent burst of radiation every half cycle of the driving field, has been combined with ultrafast wavefront rotation to create a series of spatially separated attosecond pulses, called the attosecond lighthouse. By adding a coherent second harmonic beam with polarization parallel to the fundamental, we decrease the generating frequency from twice per optical cycle to once. The increased temporal separation increases the pulse contrast. By scanning the carrier envelope phase, we see that the signal is 2π periodic.
authors: T J
authors: TJ
authors: Hammond
authors: Kyung Taec
authors: KT
authors: Kim
authors: Chunmei
authors: C
authors: Zhang
authors: D M
authors: DM
authors: Villeneuve
authors: P B
authors: PB
authors: Corkum