Waveguide-enhanced 2D-IR spectroscopy in the gas phase

Gregory M. Greetham*, Ian P. Clark, Damien Weidmann, Michael N. R. Ashfold, Andrew J. Orr-Ewing, Michael Towrie

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)peer-review

9 Citations (Scopus)
391 Downloads (Pure)


A method for obtaining high-quality 2D-IR spectra of gas-phase samples is presented. Time-resolved IR absorption spectroscopy techniques, such as 2D-IR spectroscopy, often require that beams are focused into the sample. This limits the exploitable overlapped path length through samples to a few millimeters. To circumvent this limitation, 2D-IR experiments have been performed within a hollow waveguide. This has enabled acquisition of 2D-IR spectra of low-concentration gas-phase samples, with more than an order of magnitude signal enhancement compared with the equivalent experiment in free space. The technique is demonstrated by application to the 2D-IR spectroscopy of iron pentacarbonyl. (C) 2013 Optical Society of America

Original languageEnglish
Pages (from-to)3596-3599
Number of pages4
JournalOptics Letters
Issue number18
Publication statusPublished - 15 Sept 2013




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