Journal
REVIEW OF SCIENTIFIC INSTRUMENTS
Volume 92, Issue 10, Pages -Publisher
AIP Publishing
DOI: 10.1063/5.0066760
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Funding
- European Research Council (ERC) under the European Union's Horizon 2020 Research and Innovation Programme [758461]
- Marie Sklodowska-Curie Grant [754510]
- Ministry of Science, Innovation, and Universities (MCIU)
- State Research Agency (AEI)
- European Regional Development Fund (FEDER) [PGC2018-097027-B-I00]
- Spanish MINECO [SEV-2015-0522, SEV2015-0496]
- Fundacio Privada Cellex
- CERCA Programme/Generalitat de Catalunya
- European Research Council (ERC) [758461] Funding Source: European Research Council (ERC)
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This study introduces an achromatic pump-probe setup for few-cycle pulses covering the visible to near-infrared wavelength regions. By performing measurements on Pr0.5Ca1.5MnO4, the setup's high temporal resolution and strong dependence on probe wavelength are demonstrated. The observation of a 16.5 THz phonon further showcases the setup's capabilities.
In this work, we present an achromatic pump-probe setup covering the visible (VIS) to near-infrared (NIR) wavelength regions (500-3000 nm) for few-cycle pulses. Both the pump and probe arms can work either in the VIS or the NIR wavelength regions, making our setup suitable for multi-color, broadband pump-probe measurements. In particular, our setup minimizes time-smearing due to the phase front curvature, an aspect of ultrafast spectroscopy that has been missing from previous works and allowing us to achieve sub-20-fs temporal resolution. We demonstrate the capabilities of our setup by performing measurements on Pr0.5Ca1.5MnO4. We pump and probe in both wavelength regions with a range of pump fluences and demonstrate how the observed dynamics depend strongly on the probe wavelength. Furthermore, the observation of a 16.5 THz phonon demonstrates the high temporal resolution of the setup.
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