Angular spectrum of diffracted wave fields with apochromatic correction.
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.
Zapata-Rodríguez
Carlos J
CJ
Departamento de Optica, Universidad de Valencia, 46100 Burjassot, Spain. carlos.zapata@uv.es
Caballero
María T
MT
Miret
Juan J
JJ