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"Circularly Polarized High-Order Harmonics from Tailored Laser Pulses"

Dr. Wilhelm Becker
Max Born Institut, Berlin, Germany


High harmonics of the fundamental frequency of a laser pulse irradiating a highly nonlinear system such as an atom have become a versatile source of bright radiation in the uv and xuv. Usually, the pump source is linearly polarized generating linearly polarized harmonics. Laser pulses with polarizations other than linear, especially a superposition of two pulses with different colors and opposite circular polarizations, can generate bright circularly polarized harmonics in a frequency regime that is difficult to access otherwise. I will review the generation mechanism, using the so-called strong-field approximation and the resulting "quantum orbits," and sketch various present or potential applications, such as the generation of circularly polarized attosecond pulses, electrons with spin polarization on the attosecond scale, or chiral discrimination.

October 2, 2018
IQSE 578, 12:00 Noon
Mitchell Physics Building

Institute for Quantum Science and Engineering
Texas A&M University

Pizza lunch will be served 15 minutes prior start time