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Invited Article: The coherent optical laser beam recombination technique (COLBERT) spectrometer: Coherent multidimensional spectroscopy made easier

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4 Author(s)
Turner, Daniel B. ; Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA ; Stone, Katherine W. ; Gundogdu, Kenan ; Nelson, Keith A.

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We have developed an efficient spectrometer capable of performing a wide variety of coherent multidimensional measurements at optical wavelengths. The two major components of the largely automated device are a spatial beam shaper which controls the beam geometry and a spatiotemporal pulse shaper which controls the temporal waveform of the femtosecond pulse in each beam. We describe how to construct, calibrate, and operate the device, and we discuss its limitations. We use the exciton states of a semiconductor nanostructure as a working example. A series of complex multidimensional spectra—displayed in amplitude and real parts—reveals increasingly intricate correlations among the excitons.

Published in:

Review of Scientific Instruments  (Volume:82 ,  Issue: 8 )