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Updated: May 25, 2026
06:42
Generation and Coherent Control of Pulsed Quantum Frequency Combs
Published on: June 8, 2018
Macroscopic control of quantum paths in high order harmonics by a weak second harmonic field
Shaoyi Wang1, Qingbin Zhang, Weiyi Hong
1Huazhong University of Science andTechnology, Wuhan, China.
Optics Express
|January 26, 2012
Summary
We demonstrate a novel method to control quantum paths in high-order harmonic generation using a two-color laser field. This technique enables simultaneous on-axis phase matching for short and long trajectories, aiding in single-atom dipole moment characterization.
Area of Science:
- Quantum optics
- Atomic physics
- Nonlinear optics
Background:
- High-order harmonic generation (HHG) is a crucial process for producing coherent extreme ultraviolet and X-ray radiation.
- Controlling quantum pathways in HHG is essential for optimizing light generation and probing atomic/molecular properties.
Purpose of the Study:
- To investigate the phase matching of quantum paths in HHG within a two-color laser field.
- To explore the modulation of short and long trajectories using an additional weak second harmonic field.
- To achieve simultaneous on-axis phase matching for both trajectories.
Main Methods:
- Utilizing a two-color laser field configuration.
- Introducing a weak second harmonic field to modulate phase-matching properties.
- Employing a near-field on-axis filter to observe interference patterns.
Main Results:
- The addition of a weak second harmonic field effectively modulates the phase-matching properties of both short and long quantum trajectories.
- Simultaneous on-axis phase matching for both trajectories is achieved.
- A bright interference pattern, indicative of simultaneously phase-matched trajectories, is observed.
Conclusions:
- The proposed scheme allows for effective quantum path selection in HHG.
- Simultaneous on-axis phase matching for multiple trajectories is feasible.
- This method holds significant potential for the experimental characterization of the full single-atom dipole moment.
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