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We propose a new approach to obtain molecular frame photoelectron angular distributions from molecules ionized by intense laser pulses. With our method we study the angular tunnel ionization probability of H2 at a wavelength of 800 nm over an intensity range of 2\u20134.5\ud71014\u2009\u2009W/cm2. We find an anisotropy that is stronger than predicted by any existing model. To explain the observed anisotropy and its strong intensity dependence we develop an analytical model in the framework of the strong-field approximation. It expresses molecular ionization as a product of atomic ionization rate and a Fourier transform of the highest occupied molecular orbital filtered by the strong-field ionization process.Peer reviewed: YesNRC publication: Ye

physical review letters

Angular Tunneling Ionization Probability of Fixed-in-Space<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mi mathvariant="normal">H</mml:mi><mml:mn>2</mml:mn></mml:msub></mml:math>Molecules in Intense Laser Pulses

Angular Tunneling Ionization Probability of Fixed-in-SpaceH2Molecules in Intense Laser Pulses