In this paper, control of the evolution of a two electron wave packet through the application of a static electric field is demonstrated. Specifically, application of a small electric field is used to produce pulsed autoionization events, the timing of which can be controlled on a picosecond time scale. The technique is demonstrated by exciting calcium atoms using a short-pulsed laser to the 4p3/219d doubly excited state, which is energy degenerate with the 4p1/2nk stark states. Evolution of the resultant wave packet is monitored through the application of a second short laser pulse, which stimulates the atoms to emit a photon producing singly excited Rydberg states which are detected using field ionization.



Keywords and Phrases

Calcium; Electric field effects; Electron transitions; Electronic density of states; Electrons; Energy gap; Numerical methods; Oscillations; Photons; Pulsed laser applications; Quantum theory; Pulse autoionization; Quantum defect theory; Rydberg states; Stark states; Two electron wave packets; Ionization

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Document Type

Article - Journal

Document Version

Final Version

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© 2001 American Institute of Physics (AIP), All rights reserved.

Publication Date

01 Jan 2001

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Physics Commons