Simplified and economical 2D IR spectrometer design using a dual acousto-optic modulator

TitleSimplified and economical 2D IR spectrometer design using a dual acousto-optic modulator
Publication TypeJournal Article
Year of Publication2013
AuthorsSkoff DR, Laaser JE, Mukherjee SS, Middleton CT, Zanni MT
Secondary TitleChemical Physics
Volume422
Issue30
Pagination8-15
Date Published8/2012
Abstract

Over the last decade two-dimensional infrared (2D IR) spectroscopy has proven to be a very useful extension of infrared spectroscopy, yet the technique remains restricted to a small group of specialized researchers because of its experimental complexity and high equipment cost. We report on a spectrometer that is compact, mechanically robust, and is much less expensive than previous designs because it uses a single pixel MCT detector rather than an array detector. Moreover, each axis of the spectrum can be collected in either the time or frequency domain via computer programming. We discuss pulse sequences for scanning the probe axis, which were not previously possible. We present spectra on metal carbonyl compounds at 5 μm and a model peptide at 6 μm. Data collection with a single pixel MCT takes longer than using an array detector, but publishable quality data are still achieved with only a few minutes of averaging.

URLhttp://www.sciencedirect.com/science/article/pii/S0301010412003151
DOI10.1016/j.chemphys.2012.08.019
Short TitleChemical Physics