Carrier-envelope phase control over pathway interference in strong-field dissociation of H${}_2^{+}$

Abstract

The dissociation of an H${}_2^{+}$ molecular-ion beam by linearly polarized, carrier-envelope-phase-tagged 5 fs pulses at 4$\times 10^{14}$W/cm${}^2$ 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 1-photon interference predominantly contributes at H${}^{+}$+H kinetic energy releases of 0.2 -- 0.45 eV, and net-2-photon and 1-photon interference contributes at 1.65 -- 1.9 eV. These measurements of the benchmark H${}_2^{+}$ molecule offer the distinct advantage that they can be quantitatively compared with \textit{ab initio} theory to confirm our understanding of strong-field coherent control via the carrier-envelope phase.

References in corpus (6)

• Attosecond control of electron dynamics in carbon monoxide
• Attosecond-recollision-controlled selective fragmentation of polyatomic molecules
• Unitary theory of laser Carrier-Envelope Phase effects
• Carrier envelope phase effects in ultrafast, strong-field ionization dynamics of multielectron systems: Xe and CS${}_2$
• Enhancing the intense field control of molecular fragmentation
• Carrier-Envelope-Phase Dependent Dissociation of Hydrogen

Cited by in corpus (7)

• Probing multiphoton light-induced molecular potentials
• Generalized phase-sensitivity of directional bond-breaking in laser-molecule interaction
• Disentangling the role of laser coupling in directional breaking of molecules
• Strong-field photoionization by circularly polarized light
• Phase- and intensity-dependence of ultrafast dynamics in hydrocarbon molecules in few-cycle laser fields
• Zero-energy proton dissociation of H${}_2^{+}$ through stimulated Raman scattering
• Wave-Packet Surface Propagation for Light-Induced Molecular Dissociation