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A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference

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Controlling two-photon photoemission using polarization pulse shaping.

B Golan¹, Z Fradkin, G Kopnov

¹Department of Chemical Physics, The Weizmann Institute of Science, Rehovot 76100, Israel.

The Journal of Chemical Physics

|February 19, 2009

Summary

Researchers demonstrate controlling electron emission via polarization pulse shaping in two-photon photoemission (2PPE). This method allows tuning electron angular distribution and yield, offering new insights into surface physics.

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Area of Science:

Surface science
Quantum optics
Condensed matter physics

Background:

Two-photon photoemission (2PPE) is a key technique for studying electron dynamics at surfaces.
Previous control over 2PPE relied on ultrashort pulses and single crystals.
The need for advanced methods to precisely control electron emission is critical.

Purpose of the Study:

To investigate the effect of polarization pulse shaping on two-photon photoemission.
To demonstrate control over the angular distribution and yield of emitted photoelectrons.
To explore the relationship between polarization control and surface properties.

Main Methods:

Development of a two-photon photoemission experimental setup incorporating visible-range pulse shaping.
Application of polarization pulse shaping techniques to various surfaces.
Analysis of the angular distribution and yield of photoemitted electrons.

Main Results:

Demonstrated ability to control both the angular distribution and total yield of photoemitted electrons using polarization pulse shaping.
Established a link between the effectiveness of polarization control and the surface corrugation.
Showcased the utility of visible-range pulse shaping for precise control over 2PPE.

Conclusions:

Polarization pulse shaping offers a novel and effective method for controlling electron emission in 2PPE.
Surface corrugation plays a significant role in the observed polarization-dependent control.
This technique opens new avenues for manipulating electron dynamics at surfaces with high precision.