Canova Frederico, Clady Raphael, Chambaret Jean-Paul, Flury Manuel, Tonchev Svtelen, Fechner Renate, Parriaux Olivier
Opt Express. 2007 Nov 12;15(23):15324-34. doi: 10.1364/oe.15.015324.
High efficiency, broad-band TE-polarization diffraction over a wavelength range centered at 800 nm is obtained by high index gratings placed on a non-corrugated mirror. More than 96% efficiency wide band top-hat diffraction efficiency spectra, as well as more than 1 J/cm(2) damage threshold under 50 fs pulses are demonstrated experimentally. This opens the way to high-efficiency Chirped Pulse Amplification for high average power laser machining by means of all-dielectric structures as well as for ultra-short high energy pulses by means of metal-dielectric structures.
