Carrier-envelope-phase measurement of few-cycle mid-infrared laser pulses using high harmonic generation in ZnO
Richard Hollinger, Dominik Hoff, Philipp Wustelt, Sławomir Skruszewicz, Yinyu Zhang, HuiPeng Kang, Daniel Würzler, Tom Jungnickel, Mathieu Dumergue, Arjun Nayak, Roland Flender, Ľudovít Haizer, Máté Kurucz, Bálint Kiss, Sergei Kühn, E. Cormier, Christian Spielmann, G. G. Paulus, P. Tzallas, M. Kübel
Abstract
High-harmonic generation (HHG) in crystals offers a simple, affordable and easily accessible route to carrier-envelope phase (CEP) measurements, which scales favorably towards longer wavelengths. We present measurements of HHG in ZnO using few-cycle pulses at 3.1µm. Thanks to the broad bandwidth of the driving laser pulses, spectral overlap between adjacent harmonic orders is achieved. The resulting spectral interference pattern provides access to the relative harmonic phase, and hence, the CEP.