title: Measurement of the polarization of high-order harmonics from aligned N(2) molecules by spatial interferometry.
abstract: The polarization of high-harmonics from aligned N(2) molecules was measured by observing the visibility of spatial interference between two high-harmonics generated separately. The minimum visibility was observed at an angle of 60 degrees between the polarization of the harmonic generation laser field and the molecular orientation. In this case, the angular shift of harmonic polarization is 15 degrees from the molecular orientation. Our measurement of the visibility variation matches the theoretical prediction based on the harmonic field calculation for aligned N(2) molecules.
authors.affiliation: Department of Physics and Coherent X-Ray Research Center, KAIST, Kuseong-dong, Yuseong-gu, Daejeon, Korea.
authors.forename: Gae Hwang
authors.initials: GH
authors.lastname: Lee
authors.forename: I Jong
authors.initials: IJ
authors.lastname: Kim
authors.forename: Seung Beom
authors.initials: SB
authors.lastname: Park
authors.forename: Tae Keun
authors.initials: TK
authors.lastname: Kim
authors.forename: Chang Hee
authors.initials: CH
authors.lastname: Nam