title: THz pulse shaping and improved optical-to-THz conversion efficiency using a binary phase mask.
abstract: We demonstrate improved optical-to-terahertz (THz) conversion efficiency and THz pulse shaping from an interdigitated GaAs large area photoconductive antenna by using a binary phase mask. The binary phase mask results in a time-delayed excitation of the adjacent antennas, which allows subsequent antennas to produce an additive field, thus resulting in a quasi-single-cycle THz pulse. We demonstrate control over the temporal profile of the THz waveform to maximize optical-to-THz conversion efficiency.
authors.affiliation: INRS-EMT, Advanced Laser Light Source, Université du Québec, Varennes, Québec J3X 1S2, Canada. ropagnol@emt.inrs.ca
authors.forename: Xavier
authors.initials: X
authors.lastname: Ropagnol
authors.forename: Roberto
authors.initials: R
authors.lastname: Morandotti
authors.forename: Tsuneyuki
authors.initials: T
authors.lastname: Ozaki
authors.forename: Matt
authors.initials: M
authors.lastname: Reid