The Z-scan experimental technique is used for measuring the nonlinear refractive index and nonlinear absorption coefficient of optical materials.

The sample is translated along an optical path of a focused laser beam and its intensity is simultaneously measured with open-aperture and closed-aperture photodiodes. When the sample is in the vicinity of beam focus, changes in the closed-aperture signal are mainly caused by nonlinear refraction-induced self-focusing, while the open-aperture signal deviation is mostly due to nonlinear absorption. Simultaneous fitting of the measured Z-scan traces with the theory allows for the identification of both refraction and absorption nonlinear parameters of the material.

The Z-scan measurement can be carried out inside the HARPIA-TB module using the harmonics of PHAROS or CARBIDE laser fundamental radiation or optical parametric amplifier (OPA) pump pulses. In the latter case, dispersion of nonlinear parameters can be measured, as well.

  • Delivery of an additional femtosecond or picosecond beam
  • Polarization, intensity, and delay control
  • Femtosecond stimulated Raman scattering (FSRS) support
  • Z-scan support
  • 100 fs – 20 ps tunable pulse duration
  • 4 mJ maximum pulse energy
  • 20 W maximum output power
  • Single-shot – 1 MHz repetition rate
  • BiBurst
  • Automated harmonic generators (up to 5th harmonic)
  • 190 fs – 20 ps tunable pulse duration
  • 2 mJ maximum pulse energy
  • 80 W maximum output power
  • Single-shot – 2 MHz repetition rate
  • BiBurst
  • Air-cooled version
  • 190 – 16000 nm tuning range
  • Single-shot – 2 MHz repetition rate
  • Up to 80 W pump power
  • Up to 2 mJ pump pulse energy
  • Completely automated
  • 515 nm, 343 nm, 258 nm, and 206 nm outputs
  • Simple selection of active harmonic
  • Simultaneous or switchable outputs
  • Customizable or high-power and -energy models

Flexible and Transparent Oligothiophene-o-Carborane-Containing Hybrid Films for Nonlinear Optical Limiting Based on Efficient Two-Photon Absorption

W. Feng, K. Liu, J. Zang, G. Wang, R. Miao, L. Ding, T. Liu, J. Kong, and Y. Fang, ACS Applied Materials & Interfaces (2021).

Highly broadband NLO response of acceptor–donor–acceptor materials with a planar conformation

Y. Huang, W. Zhou, X. Li, L. Jiang, and Y. Song, Materials Advances 6 (2), 2097-2103 (2021).

Highly Emissive Deep-Red Perovskite Quantum Dots in Glass: Photoinduced Thermal Engineering and Applications

K. Sun, D. Tan, J. Song, W. Xiang, B. Xu, and J. Qiu, Advanced Optical Materials, 2100094 (2021).

Linear and nonlinear optical characteristics of CsPbBr3 perovskite quantum dots-doped borosilicate glasses

Z. Xu, T. Chen, D. Zhang, G. Zheng, J. Wu, J. Yan, X. Liu, and J. Qiu, Journal of the European Ceramic Society 1 (41), 729-734 (2021).

Nonlinear optical properties of 6H-SiC and 4H-SiC in an extensive spectral range

X. Guo, Z. Peng, P. Ding, L. Li, X. Chen, H. Wei, Z. Tong, and L. Guo, Optical Materials Express 4 (11), 1080 (2021).

Anthracene derivatives as broadband nonlinear optical materials: nonlinear absorption and excited-state dynamics analysis

W. Zhou, Y. Fang, X. Wu, Y. Han, J. Yang, L. Shen, and Y. Song, RSC Advances 34 (10), 19974-19981 (2020).

D–π–A-Type Pyrene Derivatives with Different Push–Pull Properties: Broadband Absorption Response and Transient Dynamic Analysis

R. Niu, Y. Wang, X. Wu, S. Chen, X. Zhang, and Y. Song, The Journal of Physical Chemistry C 9 (124), 5345-5352 (2020).

Enhanced Reverse Saturable Absorption in Substituted Twistacenes from Visible to Near-Infrared: Modulation of Terminal Twisted π-Conjugated Units

J. Jia, X. Wu, Y. Fang, J. Yang, Y. Han, J. Xiao, X. Zhang, Y. Wang, and Y. Song, The Journal of Physical Chemistry C 8 (124), 4701-4708 (2020).

Investigation of ultrafast optical nonlinearities in novel bis-chalcone derivatives

Y. Yang, X. Wu, J. Jia, L. Shen, W. Zhou, J. Yang, and Y. Song, Optics & Laser Technology 123, 105903 (2020).

Ultrafast broadband nonlinear optical properties and excited-state dynamics of two bis-chalcone derivatives

L. Shen, Z. Li, X. Wu, W. Zhou, J. Yang, and Y. Song, RSC Advances 26 (10), 15199-15205 (2020).

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