title: Intense THz source based on BNA organic crystal pumped at Ti:sapphire wavelength.
abstract: We report on high-energy terahertz pulses by optical rectification (OR) in the organic crystal N-benzyl-2-methyl-4-nitroaniline (BNA) directly pumped by a conventional Ti:sapphire amplifier. The simple scheme provides an optical-to-terahertz conversion efficiency of 0.25% when pumped by collimated laser pulses with a duration of 50 fs and a central wavelength of 800 nm. The generated radiation spans frequencies between 0.2 and 3 THz. We measured the damage threshold, as well as the dependency of the conversion efficiency on the pump fluence, pump wavelength, and pulse duration.
authors.forename: Mostafa
authors.initials: M
authors.lastname: Shalaby
authors.forename: Carlo
authors.initials: C
authors.lastname: Vicario
authors.forename: Karunanithi
authors.initials: K
authors.lastname: Thirupugalmani
authors.forename: Srinivasan
authors.initials: S
authors.lastname: Brahadeeswaran
authors.forename: Christoph P
authors.initials: CP
authors.lastname: Hauri