= David W. McCamant
{c}
<David W. McCamant> is a physical chemist studying light–matter interactions and fast molecular processes. His Rochester research-group biography describes his Berkeley doctoral work with <Richard A. Mathies> on <femtosecond stimulated Raman spectroscopy>. The2003 method paper independently verifies his full byline as David W. McCamant.<David W. McCamant research-group biography at the University of Rochester>[Principal-investigator biography.]{ref}<Femtosecond Broadband Stimulated Raman: A New Approach for High-Performance Vibrational Spectroscopy by David W. McCamant and others>[Full author byline.]{ref}
The coauthored apparatus uses a filtered pump near793nm, a continuum probe and spectrally resolved probe/reference detection to measure vibrational gain.<Femtosecond Broadband Stimulated Raman: A New Approach for High-Performance Vibrational Spectroscopy by David W. McCamant and others>[Materials and Methods, Instrumentation and Fig.2.]{ref} This makes a molecular vibration accessible through the difference between optical frequencies.
For an original conversion example, a793-nm pump and an850-nm Stokes probe correspond to <Raman shift>
$$
\Delta\widetilde\nu=10^7\left(\frac1{793}-\frac1{850}\right)\,\mathrm{cm^{-1}}\approx846\,\mathrm{cm^{-1}}.
$$
The factor $10^7$ converts reciprocal nanometres to reciprocal centimetres. Subtracting wavelengths directly would not give the vibrational wavenumber. The850-nm value is stipulated for this example, not attributed as a measured band in the paper.
The method connects pulse design, <spectral resolution> and quantitative signal processing with questions about molecular dynamics. A rapidly changing signal still needs a molecular assignment and appropriate instrumental controls before it establishes a particular reaction pathway.
\Image[https://www.sas.rochester.edu/chm/groups/mccamant/assets/images/mccamant-d.png]
{title=<David W. McCamant>, portrait identified by his Rochester research-group page}
Back to article page
