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Permanent URL to this publication: http://dx.doi.org/10.5167/uzh-49633

Rehault, J; Zanirato, V; Olivucci, M; Helbing, J (2011). Linear dichroism amplification: Adapting a long-known technique for ultrasensitive femtosecond IR spectroscopy. Journal of Chemical Physics, 134(12):124516.

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Abstract

We demonstrate strong amplification of polarization-sensitive transient IR signals using a pseudo-null crossed polarizer technique first proposed by Keston and Lospalluto [Fed. Proc. 10, 207 (1951)] and applied for nanosecond flash photolysis in the visible by Che et al. [Chem. Phys. Lett. 224, 145 (1994)]. We adapted the technique to ultrafast pulsed laser spectroscopy in the infrared using photoelastic modulators, which allow us to measure amplified linear dichroism at kilohertz repetition rates. The method was applied to a photoswitch of the N-alkylated Schiff base family in order to demonstrate its potential of strongly enhancing sensitivity and signal to noise in ultrafast transient IR experiments, to simplify spectra and to determine intramolecular transition dipole orientations.

Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Institute of Physical Chemistry
DDC:540 Chemistry
Language:English
Date:28 March 2011
Deposited On:01 Mar 2012 13:00
Last Modified:02 Dec 2013 03:48
Publisher:American Institute of Physics
ISSN:0021-9606
Funders:Swiss National Science Foundation (SNF)
Publisher DOI:10.1063/1.3572334
Citations:Web of Science®. Times Cited: 4
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