title: Angular spectrum of diffracted wave fields with apochromatic correction.
abstract: We report on compensation of diffraction-induced angular dispersion of ultrashort pulses up to a second order. A strategy for chromatic correction profits from high dispersion of kinoform-type zone plates. Ultraflat dispersion curves rely on a saddle point that may be tuned at a prescribed wavelength. Validity of our approach may reach the few-cycles regime.
authors.affiliation: Departamento de Optica, Universidad de Valencia, 46100 Burjassot, Spain. carlos.zapata@uv.es
authors.forename: Carlos J
authors.initials: CJ
authors.lastname: Zapata-Rodríguez
authors.forename: María T
authors.initials: MT
authors.lastname: Caballero
authors.forename: Juan J
authors.initials: JJ
authors.lastname: Miret