Carrier-envelope phase control over pathway interference in strong-field dissociation of H2

Carrier-envelope phase control over pathway interference in strong-field dissociation of H2

The dissociation of an H2+ molecular-ion beam by linearly polarized, carrier-envelope-phase-tagged 5 fs pulses at 4×10(14) W/cm2 with a central wavelength of 730 nm was studied using a coincidence 3D momentum imaging technique. Carrier-envelope-phase-dependent asymmetries in the emission direction o...

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Veröffentlicht in:Physical review letters 2013-10, Vol.111 (16), p.163004-163004
Hauptverfasser: Kling, Nora G, Betsch, K J, Zohrabi, M, Zeng, S, Anis, F, Ablikim, U, Jochim, Bethany, Wang, Z, Kübel, M, Kling, M F, Carnes, K D, Esry, B D, Ben-Itzhak, I
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container_end_page 163004
container_issue 16
container_start_page 163004
container_title Physical review letters
container_volume 111
creator Kling, Nora G
Betsch, K J
Zohrabi, M
Zeng, S
Anis, F
Ablikim, U
Jochim, Bethany
Wang, Z
Kübel, M
Kling, M F
Carnes, K D
Esry, B D
Ben-Itzhak, I
description The dissociation of an H2+ molecular-ion beam by linearly polarized, carrier-envelope-phase-tagged 5 fs pulses at 4×10(14) W/cm2 with a central wavelength of 730 nm was studied using a coincidence 3D momentum imaging technique. Carrier-envelope-phase-dependent asymmetries in the emission direction of H+ fragments relative to the laser polarization were observed. These asymmetries are caused by interference of odd and even photon number pathways, where net zero-photon and one-photon interference predominantly contributes at H+ + H kinetic energy releases of 0.2-0.45 eV, and net two-photon and one-photon interference contributes at 1.65-1.9 eV. These measurements of the benchmark H2+ molecule offer the distinct advantage that they can be quantitatively compared with ab initio theory to confirm our understanding of strong-field coherent control via the carrier-envelope phase.
doi_str_mv 10.1103/PhysRevLett.111.163004
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title Carrier-envelope phase control over pathway interference in strong-field dissociation of H2
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