Enhancing high-order above-threshold dissociation of H2+ beams with few-cycle laser pulses |
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Authors: | McKenna J Sayler A M Anis F Gaire B Johnson Nora G Parke E Hua J J Mashiko H Nakamura C M Moon E Chang Z Carnes K D Esry B D Ben-Itzhak I |
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Institution: | J.R. Macdonald Laboratory, Kansas State University, Manhattan, Kansas 66506, USA. |
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Abstract: | High-order (three-photon or more) above-threshold dissociation (ATD) of H(2)(+) has generally not been observed using 800 nm light. We demonstrate a strong enhancement of its probability using intense 7 fs laser pulses interacting with beams of H(2)(+), HD(+), and D(2)(+) ions. The mechanism invokes a dynamic control of the dissociation pathway. These measurements are supported by theory that additionally reveals, for the first time, an unexpectedly large contribution to ATD from highly excited electronic states. |
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