AI Article Synopsis
- - The new pump-probe system uses a 60-MHz dual-comb oscillator and ultra-low noise supercontinuum to improve measurement speed and reduce complexity, especially for low excitation fluences.
- - This setup is capable of operating in different modes and allows for detailed study of excited-state dynamics, specifically of the non-fullerene electron acceptor Y6, which is important for solar cell technology.
- - The system achieves high sensitivity in differential transmission measurements and aims to enhance ultrafast spectroscopy research.
Article Abstract
Amplifier-based pump-probe systems, while versatile, often suffer from complexity and low measurement speeds, especially when probing samples require low excitation fluences. To address these limitations, we introduce a pump-probe system that leverages a 60-MHz single-cavity dual-comb oscillator and an ultra-low noise supercontinuum. The setup can operate in equivalent time sampling or in programmable optical delay generation modes. We employ this system to study the wavelength-dependent excited-state dynamics of the non-fullerene electron acceptor Y6, a compound of interest in solar cell development, with excitation fluences as low as 1 nJ/cm, well below the onset of nonlinear exciton annihilation effects. Our measurements reach a shot-noise limited sensitivity in differential transmission of 3.4·10. The results demonstrate the system's potential to advance the field of ultrafast spectroscopy.
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| http://dx.doi.org/10.1364/OL.538105 | DOI Listing |
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