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Related Experiment Video

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Measurement of X-ray Beam Coherence along Multiple Directions Using 2-D Checkerboard Phase Grating

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Published on: October 11, 2016

Carrier-Envelope-Phase Characterization for an Isolated Attosecond Pulse by Angular Streaking.

Pei-Lun He¹, Camilo Ruiz², Feng He¹

¹Key Laboratory for Laser Plasmas (Ministry of Education) and Department of Physics and Astronomy, Collaborative Innovation Center of IFSA (CICIFSA), Shanghai Jiao Tong University, Shanghai 200240, China.

Physical Review Letters

|June 4, 2016

Summary

We present a method to measure the carrier envelope phase (CEP) of isolated attosecond pulses (IAPs) by simulating electron tunneling ionization. This technique enables precise characterization of ultrafast laser pulses for advanced research.

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Area of Science:

Quantum Optics
Attosecond Science
Laser Physics

Background:

The carrier envelope phase (CEP) is critical for defining the waveform of few-cycle laser pulses.
Characterizing the CEP of extreme ultraviolet (EUV) pulses is essential for controlling ultrafast phenomena.

Purpose of the Study:

To propose and numerically simulate a direct method for characterizing the CEP of isolated attosecond pulses (IAPs).
To enable precise control and understanding of sub-EUV-cycle dynamics.

Main Methods:

Numerical simulation of hydrogen atom tunneling ionization in combined IAP and IR laser fields.
Exploiting the exponential amplification of CEP-induced modulations on the ionization rate.
Analyzing photoelectron momentum distributions resulting from angular streaking.

Main Results:

Distinct time-dependent tunneling ionization rates are sensitive to IAP CEP variations.
Angular streaking of photoelectrons provides a measurable signature of CEP modulations.
Successful retrieval of the IAP CEP is demonstrated through simulated photoelectron momentum distributions.

Conclusions:

The proposed method offers a direct route to characterize the CEP of isolated attosecond pulses.
This capability is crucial for advancing ultrafast science and probing sub-EUV-cycle dynamics.