期刊
STRUCTURAL DYNAMICS-US
卷 3, 期 6, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.4964821
关键词
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资金
- EPSRC programme [EP/I032517/1]
- ERC ASTEX Project [290467]
- EPSRC/DSTL MURI [EP/N018680/1]
- Marie Curie ITN [EC317232]
- NSERC [PGSD3-454096-2014]
- Marie Sklodowska-Curie [641272]
- Imperial College JRF scheme
- Engineering and Physical Sciences Research Council [1378532] Funding Source: researchfish
- Marie Curie Actions (MSCA) [641272] Funding Source: Marie Curie Actions (MSCA)
We use a high harmonic generated supercontinuum in the soft X-ray region to measure X-ray absorption near edge structure (XANES) spectra in polythiophene (poly(3-hexylthiophene)) films at multiple absorption edges. A few-cycle carrier-envelope phase-stable laser pulse centered at 1800 nm was used to generate a stable soft X-ray supercontinuum, with amplitude gating limiting the generated pulse duration to a single optical half-cycle. We report a quantitative transmission measurement of the sulfur L-2,L-3 edge over the range 160-200 eV and the carbon K edge from 280 to 330 eV. These spectra show all the features previously reported in the XANES spectra of polythiophene, but for the first time they are measured with a source that has an approximately 1 fs pulse duration. This study opens the door to measurements that can fully time-resolve the photoexcited electronic dynamics in these systems. (C) 2016 Author(s).
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