Projects per year
Abstract
We describe the development of a broadband magneto-optical spectrometer with femtosecond temporal resolution. The absorption spectrometer is based on a white-light supercontinuum (∼320 to 750 nm) using shot-to-shot temporal and spectral referencing at 1 kHz. Static and transient absorption spectra using circularly polarized light are collected in a magnetic field. The difference spectra with respect to the external field direction give the static and transient magneto-optical Faraday rotation (magnetic optical rotary dispersion) and ellipticity (magnetic circular dichroism) spectra. An achromatic quarter-wave plate is used, and the impact of the deviation from ideal retardance on the spectra is discussed. Results from solution-based and thin-film samples are used to demonstrate the performance and wide applicability of the instrument. The sensitivities for the static and time-resolved data were found to be 5 and 0.4 mdeg, respectively. The method presents a simple way to measure magneto-optical spectra using a transient absorption spectrometer and an electromagnet.
Original language | English |
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Article number | 113001 |
Journal | Review of Scientific Instruments |
Volume | 92 |
Early online date | 8 Nov 2021 |
DOIs | |
Publication status | E-pub ahead of print - 8 Nov 2021 |
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Dive into the research topics of 'A femtosecond magnetic circular dichroism spectrometer'. Together they form a unique fingerprint.Projects
- 2 Finished
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Femtosecond Coherences in Single-Molecule Magnets
Johansson, O. (Principal Investigator) & Brechin, E. (Co-investigator)
5/04/21 → 4/04/24
Project: Research
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Ultrafast spin dynamics in molecular magnets
Johansson, O. (Principal Investigator)
1/04/19 → 30/06/22
Project: Research