Transient absorption with a hollow core fibre
Noble-gas-filled hollow-core fibres (HCFs) are convenient for accessing extremely broadband excitation spectra. We use the output of an HCF as both pump and probe pulses after spectral selection and additional broadening steps. This leads to a highly versatile experiment, employed for studying
- Photocatalytic activity of organic photocatalysts and substrates
- Photophysics of DNA-stabilized silver clusters
- Energy- and charge transfer dynamics in organic solar cell materials
- Vibrational cooling and energy transfer dynamics of chlorophylls and carotenoids
- ...and in your potential Bachelor/Master/PhD-project.
Involved group members
Ajeet Kumar
ajeet.kumar@tum.de
Erika Keil
erika.keil@tum.de
Further reading
Ma, X.; Dostál, J.; Brixner, T. Broadband 7-fs diffractive-optic-based 2D electronic spectroscopy using hollow-core fiber compression. Opt. Express 2016, 24 (18), 20781-20791. DOI: 10.1364/OE.24.020781.
Own work
Keil, E.; Malevich, P.; Hauer, J. Achromatic frequency doubling of supercontinuum pulses for transient absorption spectroscopy. Opt. Express 2021, 29 (24), 39042-39054. DOI: 10.1364/OE.442400.
Kumar, A.; Malevich, P.; Mewes, L.; Wu, S.; Barham, J. P.; Hauer, J. Transient absorption spectroscopy based on uncompressed hollow core fiber white light proves pre-association between a radical ion photocatalyst and substrate. The Journal of Chemical Physics 2023, 158 (14), 144201. DOI: 10.1063/5.0142225.