Temporal characterization of a two-color laser field using tunneling ionization

Area of Science:

• Atomic, Molecular, and Optical Physics
• Ultrafast Laser Science
• Nonlinear Optics

Background:

• Asymmetric laser fields formed by fundamental and second harmonic pulses have diverse applications.
• Temporal characterization of these two-color laser fields is essential but challenging.
• Challenges arise from broad bandwidths and spectral gaps between frequency components.

Purpose of the Study:

• To demonstrate a new method for the temporal characterization of two-color laser fields.
• To enable complete temporal characterization, including the relative phase between frequency components.

Main Methods:

• Utilized multiple ionization yield measurements.
• Performed measurements in the vicinity of the laser focus.
• Applied the technique to a laser field composed of fundamental and second harmonic pulses.

Main Results:

• Successfully demonstrated the temporal characterization of the two-color laser field.
• The method provides a complete temporal profile of the laser field.
• The relative phase between the fundamental and second harmonic components was determined.

Conclusions:

• The developed method offers a robust solution for characterizing complex two-color laser fields.
• This technique overcomes previous limitations in temporal characterization.
• Enables precise control and understanding of laser-matter interactions for advanced applications.