Visible pump-mid infrared pump-broadband probe: Development and characterization of a three-pulse setup for single-shot ultrafast spectroscopy at 50 kHz
Montanaro A, Giusti F, Colja M, Brajnik G, Marciniak AMA, Sergo R, De Angelis D, Glerean F, Sparapassi G, Jarc G, Carrato S, Cautero G, Fausti D (2020)
Publication Type: Journal article
Publication year: 2020
Journal
Book Volume: 91
Article Number: 073106
Journal Issue: 7
DOI: 10.1063/5.0016362
Abstract
We report here an experimental setup to perform three-pulse pump-probe measurements over a wide wavelength and temperature range. By combining two pump pulses in the visible (650 nm-900 nm) and mid-IR (5 μm-20 μm) range, with a broadband supercontinuum white-light probe, our apparatus enables both the combined selective excitation of different material degrees of freedom and a full time-dependent reconstruction of the non-equilibrium dielectric function of the sample. We describe here the optical setup, the cryogenic sample environment, and the custom-made acquisition electronics capable of referenced single-pulse detection of broadband spectra at the maximum repetition rate of 50 kHz, achieving a sensitivity of the order of 10-4 over an integration time of 1 s. We demonstrate the performance of the setup by reporting data on a mid-IR pump, optical push, and broadband probe in a single crystal of Bi2Sr2Y0.08Ca0.92Cu2O8+δ across the superconducting and pseudogap phases.
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APA:
Montanaro, A., Giusti, F., Colja, M., Brajnik, G., Marciniak, A.M.A., Sergo, R.,... Fausti, D. (2020). Visible pump-mid infrared pump-broadband probe: Development and characterization of a three-pulse setup for single-shot ultrafast spectroscopy at 50 kHz. Review of Scientific Instruments, 91(7). https://doi.org/10.1063/5.0016362
MLA:
Montanaro, Angela, et al. "Visible pump-mid infrared pump-broadband probe: Development and characterization of a three-pulse setup for single-shot ultrafast spectroscopy at 50 kHz." Review of Scientific Instruments 91.7 (2020).
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