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Title: Near shot-noise limited time-resolved circular dichroism pump-probe spectrometer

Journal Article · · Review of Scientific Instruments
DOI:https://doi.org/10.1063/1.5009468· OSTI ID:1470599
ORCiD logo [1]; ORCiD logo [2];  [2];  [1]
  1. Purdue Univ., West Lafayette, IN (United States). Dept. of Physics and Astronomy
  2. 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)
Grant/Contract Number:
SC0001035; FG02-09ER16084; SC0001341
OSTI ID:
1470599
Alternate ID(s):
OSTI ID: 1425540
Journal Information:
Review of Scientific Instruments, Vol. 89, Issue 3; Related Information: PARC partners with Washington University in St. Louis (lead); University of California, Riverside; University of Glasgow, UK; Los Alamos National Laboratory; University of New Mexico; New Mexico Corsortium; North Carolina State University; Northwestern University; Oak Ridge National Laboratory; University of Pennsylvania; Sandia National Laboratories; University of Sheffield, UK; ISSN 0034-6748
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 9 works
Citation information provided by
Web of Science

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Cited By (2)

Ultrafast broadband circular dichroism in the deep ultraviolet journal January 2019
Ultrafast broadband circular dichroism in the deep ultraviolet text January 2019