Near shot-noise limited time-resolved circular dichroism pump-probe spectrometer
Journal Article
·
· Review of Scientific Instruments
- Purdue Univ., West Lafayette, IN (United States). Dept. of Physics and Astronomy
- Washington Univ., St. Louis, MO (United States). Dept. of Biology and Chemistry, Photosynthetic Antenna Research Center
We describe an optical near shot-noise limited time-resolved circular dichroism (TRCD) pump-probe spectrometer capable of reliably measuring circular dichroism signals in the order of $$\mu$$deg with nanosecond time resolution. Such sensitivity is achieved through a modification of existing TRCD designs and introduction of a new data processing protocol that eliminates approximations that have caused substantial nonlinearities in past measurements and allows the measurement of absorption and circular dichroism transients simultaneously with a single pump pulse. The exceptional signal-to-noise ratio of the described setup makes the TRCD technique applicable to a large range of non-biological and biological systems. Finally, the spectrometer was used to record, for the first time, weak TRCD kinetics associated with the triplet state energy transfer in the photosynthetic Fenna-Matthews-Olson antenna pigment-protein complex.
- Research Organization:
- Energy Frontier Research Centers (EFRC) (United States). Photosynthetic Antenna Research Center (PARC)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
- Grant/Contract Number:
- SC0001035; SC0001341
- OSTI ID:
- 1470599
- Alternate ID(s):
- OSTI ID: 1425540
- Journal Information:
- Review of Scientific Instruments, Journal Name: Review of Scientific Instruments Journal Issue: 3 Vol. 89; ISSN 0034-6748
- Publisher:
- American Institute of Physics (AIP)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Ultrafast broadband circular dichroism in the deep ultraviolet
|
journal | January 2019 |
Ultrafast broadband circular dichroism in the deep ultraviolet
|
text | January 2019 |
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