title: Analysis on the origin of the ultrafast optical nonlinearity of carbon disulfide around 800 nm.
abstract: The femtosecond open-aperture Z-scan of standard sample CS(2) at 800 and 780 nm is present here by using thinner sample length and an integrating sphere. The open-aperture Z-scan signal is verified to arise mainly from nonlinear scattering, not from two- or three-photon absorption as reported in literature. And the two- and three-photon absorption coefficients of CS(2) are negligible. Therefore, around 800 nm the femtosecond open-aperture Z-scan of CS(2) cannot be used to calibrate Z-scan measurement system, but the closed-aperture Z-scan is capable.
authors.affiliation: The Key Laboratory of Weak Light Nonlinear Photonics, Ministry of Education, Teda Applied Physics School, Nankai University, Tianjin 300457, China.
authors.forename: Xiao-Qing
authors.initials: XQ
authors.lastname: Yan
authors.forename: Zhi-Bo
authors.initials: ZB
authors.lastname: Liu
authors.forename: Shuo
authors.initials: S
authors.lastname: Shi
authors.forename: Wen-Yuan
authors.initials: WY
authors.lastname: Zhou
authors.forename: Jian-Guo
authors.initials: JG
authors.lastname: Tian
mesh_terms: D002246:Carbon Disulfide / Q000737:chemistry*; D017711:Nonlinear Dynamics; D012031:Refractometry / Q000379:methods*
chemical_list: D002246:Carbon Disulfide