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This content will become publicly available on March 6, 2018

Title: Analyte-induced spectral filtering in femtosecond transient absorption spectroscopy

Here, we discuss the influence of spectral filtering by samples in femtosecond transient absorption measurements. Commercial instruments for transient absorption spectroscopy (TA) have become increasingly available to scientists in recent years and TA is becoming an established technique to measure the dynamics of photoexcited systems. Furthermore, we show that absorption of the excitation pulse by the sample can severely alter the spectrum and consequently the temporal pulse shape. This “spectral self-filtering” effect can lead to systematic errors and misinterpretation of data, most notably in concentration dependent measurements. Finally, the combination of narrow absorption peaks in the sample with ultrafast broadband excitation pulses is especially prone to this effect.
Authors:
 [1] ;  [2] ;  [3]
  1. Univ. of Delaware, Newark, DE (United States). Dept. of Chemistry and Biochemistry
  2. Univ. of Delaware, Newark, DE (United States). Dept. of Physics and Astronomy
  3. Univ. of Delaware, Newark, DE (United States). Dept. of Chemistry and Biochemistry and Dept. of Physics and Astronomy
Publication Date:
Grant/Contract Number:
SC0016288
Type:
Accepted Manuscript
Journal Name:
Journal of Luminescence
Additional Journal Information:
Journal Volume: 187; Journal Issue: C; Journal ID: ISSN 0022-2313
Publisher:
Elsevier
Research Org:
Univ. of Delaware, Newark, DE (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; transient absorption; excited state dynamics; concentration effects; resolution
OSTI Identifier:
1345803
Alternate Identifier(s):
OSTI ID: 1414333