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A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
Published on: September 5, 2019
Broadband large-ellipticity harmonic generation with polar molecules
Meiyan Qin1, Xiaosong Zhu, Qingbin Zhang
1Huazhong University of Science and Technology, Wuhan, China.
Optics Express
|January 26, 2012
Summary
Polar molecules generate elliptically polarized high harmonic generation (HHG) due to their asymmetric orbital structure. This finding offers a new method for creating XUV pulses for advanced detection applications.
Area of Science:
- Quantum optics
- Molecular physics
- Attosecond science
Background:
- High harmonic generation (HHG) is a key process for producing extreme ultraviolet (XUV) light.
- Understanding polarization properties of HHG is crucial for its applications.
Purpose of the Study:
- To investigate the polarization characteristics of HHG from polar molecules.
- To identify the origin of observed polarization properties.
Main Methods:
- Theoretical investigation of high harmonic generation from polar molecules.
- Analysis of molecular orbital symmetry and its effect on harmonic polarization.
Main Results:
- Elliptically polarized harmonics are observed across a broad spectral range, from the plateau to the cutoff.
- The non-symmetric structure of the highest occupied molecular orbital is identified as the source of harmonic ellipticity.
Conclusions:
- The study reveals the origin of ellipticity in HHG from polar molecules.
- A method for generating large-ellipticity XUV pulses is proposed, benefiting applications in materials and biological sciences.
