Applied Physics B

, Volume 95, Issue 2, pp 375–381

Z-scan analytical theories for characterizing multiphoton absorbers


DOI: 10.1007/s00340-009-3426-y

Cite this article as:
Gu, B., Huang, XQ., Tan, SQ. et al. Appl. Phys. B (2009) 95: 375. doi:10.1007/s00340-009-3426-y


The open-aperture Gaussian-beam Z-scan measurements for characterizing an optically thin multiphoton-absorbing material were systematically investigated. Two widely used temporal profiles of the laser pulses on Z-scan traces were considered as well. The analytical polynomial expressions of Z-scan traces were presented for a thin sample with only one nonlinear process at a time [two-, three-, four-, or five-photon absorption (2PA, 3PA, 4PA, or 5PA)] and concurrence of two different processes (e.g., 2PA and 3PA, 3PA and 4PA, or 4PA and 5PA), respectively. A simple yet highly efficient approach was presented for identifying and evaluating the simultaneous n- and (n+1)-photon absorption coefficients.


42.25.Bs 42.70.Jk 42.70.Nq 

Copyright information

© Springer-Verlag 2009

Authors and Affiliations

  1. 1.Jiangsu Key Laboratory on Opto-Electronic Technology and Department of PhysicsNanjing Normal UniversityNanjingChina
  2. 2.Department of PhysicsNational University of SingaporeSingaporeSingapore

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