| Autor: |
Gruber C, Pupeikis J, Camenzind SL, Willenberg B, Camargo FVA, Lang L, Hamm P, Rampur A, Heidt A, Phillips CR, Cerullo G, Keller U |
| Jazyk: |
angličtina |
| Zdroj: |
Optics letters [Opt Lett] 2024 Nov 15; Vol. 49 (22), pp. 6445-6448. |
| DOI: |
10.1364/OL.538105 |
| Abstrakt: |
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 2 , well below the onset of nonlinear exciton annihilation effects. Our measurements reach a shot-noise limited sensitivity in differential transmission of 3.4·10 -7 . The results demonstrate the system's potential to advance the field of ultrafast spectroscopy. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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