title: Autocorrelation and phase retrieval in the UV using two-photon absorption in diamond pin photodiodes.
abstract: We report on the utilization of the two-photon induced free carrier generation in a diamond pin-type photodiode to record fringe-resolved second-order autocorrelations of femtosecond pulses in the UV. Measurements in photovoltaic mode are performed at the second and third harmonic of a Ti:sapphire laser (lambda(0)=401 nm and lambda(0)=265 nm) with pulse energies down to about 2 nJ. The band gap of diamond of 5.5 eV sets a short wavelength limit at about 225 nm. Combined with the simultaneously recorded linear autocorrelation the spectral phase is reconstructed employing an iterative algorithm.
authors.affiliation: Westfälische Wilhelms-Universität Münster, Physikalisches Institut, 48149 Münster, Germany.
authors.forename: Nils Fabian
authors.initials: NF
authors.lastname: Kleimeier
authors.forename: Thorben
authors.initials: T
authors.lastname: Haarlammert
authors.forename: Henrik
authors.initials: H
authors.lastname: Witte
authors.forename: Udo
authors.initials: U
authors.lastname: Schühle
authors.forename: Jean-Francois
authors.initials: JF
authors.lastname: Hochedez
authors.forename: Ali
authors.initials: A
authors.lastname: BenMoussa
authors.forename: Helmut
authors.initials: H
authors.lastname: Zacharias
mesh_terms: D000465:Algorithms; D000537:Aluminum Oxide / Q000737:chemistry; D007834:Lasers; D008027:Light; D016011:Normal Distribution; D055095:Optics and Photonics; D017785:Photons; D013053:Spectrophotometry / Q000379:methods*; D014025:Titanium / Q000737:chemistry; D014466:Ultraviolet Rays
chemical_list: D014025:Titanium; D000537:Aluminum Oxide