Journal of the European Optical Society-Rapid Publications, Volume. 19, Issue 1, 2023008(2023)

Novel time-resolved CARS implementation for application in microscopy

Pieter H. Neethling1,*... Ruan Viljoen1, Alexander M. Heidt2, Dirk Spangenberg1,2, Thomas Feurer2 and Erich G. Rohwer1 |Show fewer author(s)
Author Affiliations
  • 1Laser Research Institute, Stellenbosch University, 7600 Stellenbosch, South Africa
  • 2Institute for Applied Physics, University of Bern, 3012 Bern, Switzerland
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    Figures & Tables(3)
    (A) Spectrogram of the CS2/benzene mixture with three regions of interest (R1, R2, and R3) highlighted. R1 shows the resonant response from the CS2 656 cm−1 peak, while R2 shows the resonant response of the 991 cm−1 benzene peak. R3 highlights the instrument response function, used to measure the temporal profile of the probe pulse. (B) The instrument response as measured from a lineout in region R3, with a Gaussian fit to the central maximum, with full-width-at-half-maximum (FWHM) of 265 fs.
    (A) A lineout from the spectrogram in Figure 1A taken at the 656 cm−1 CS2 peak. (B) A lineout from the spectrogram in Figure 1A taken at the 991 cm−1 benzene peak. In both figures the data was fitted with an exponential decay function (pink line) from 400 fs onwards.
    (A) The spectrogram of the CS2/benzene mixture obtained by targeting different wavenumbers using quadratic phase spectral focussing and a probe delayed by 800 fs with respect to the pump. (B) The lineouts at 656 cm−1 and 991 cm−1 target wavenumbers, indicating the suppression of the non-resonant background.
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    Pieter H. Neethling, Ruan Viljoen, Alexander M. Heidt, Dirk Spangenberg, Thomas Feurer, Erich G. Rohwer. Novel time-resolved CARS implementation for application in microscopy[J]. Journal of the European Optical Society-Rapid Publications, 2023, 19(1): 2023008

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    Paper Information

    Category: Research Articles

    Received: Dec. 12, 2022

    Accepted: Feb. 27, 2023

    Published Online: Aug. 31, 2023

    The Author Email: Neethling Pieter H. (pietern@sun.ac.za)

    DOI:10.1051/jeos/2023008

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