Journal article
Carrier-envelope phase effects in above-threshold ionization of atomic hydrogen
WC Wallace, MG Pullen, DE Laban, O Ghafur, H Xu, AJ Palmer, GF Hanne, K Bartschat, AN Grum-Grzhimailo, HM Quiney, IV Litvinyuk, RT Sang, D Kielpinski
New Journal of Physics | IOP PUBLISHING LTD | Published : 2013
Abstract
Recent experiments in ultrafast physics have established the importance of above-threshold ionization (ATI) experiments in measuring and controlling the carrier-envelope phase (CEP) of few-cycle laser pulses. We have performed an investigation of atomic hydrogen subjected to intense CEP-stable few-cycle laser pulses. The experimental ATI spectra have been compared to predictions from an ab initio numerical solution of the time-dependent Schrödinger equation in three dimensions. Good agreement between experiment and theory has been achieved without using any free fit parameters. Our results provide an important step towards obtaining calibrated reference data for a direct comparison of ATI el..
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Awarded by National Science Foundation
Funding Acknowledgements
We thank Daniel Kleppner for assistance with the atomic hydrogen beam source. This work was supported by the United States Air Force Office of Scientific Research (USA-FOSR) under grant number FA2386-09-1-4015 and the Australian Research Council under grant numbers DP0878560 and CE0561787. WCW, MGP and DEL were supported by Australian Postgraduate Awards. KB acknowledges support from the United States National Science Foundation under grant number PHY-1068140. DK was supported by ARC Future Fellowship FT110100513.