THz generation by optical Cherenkov emission from ionizing two-color laser pulses

Abstract

Two-color photoionization produces a cycle-averaged current driving broadband, conically emitted THz radiation. We investigate, through simulation, the processes determining the angle of conical emission. We find that the emission angle is determined by an optical Cherenkov effect, where the front velocity of the current source is faster than the THz phase velocity.

9 pages, 9 figures

References in corpus (2)

• Strong Field Ionization Rate for Arbitrary Laser Frequencies
• Initial carrier-envelope phase of few-cycle pulses determined by THz emission from air plasma

Cited by in corpus (9)

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• Steering laser-produced THz radiation in air with superluminal ionization fronts
• Boosting terahertz-radiation power with two-color circularly polarized midinfrared laser pulses
• Model for the Atomic Dielectric Response in Time Dependent Laser Fields
• Far-field model of two-color laser driven terahertz radiation including field element interference and plasma response
• Strong field ionization and gauge dependence of nonlocal potentials