= P. Matousek
{c}
\b[P. Matousek], identified by the Central Laser Facility as \b[Pavel Matousek], developed <spatially offset Raman spectroscopy> for chemical measurements through diffusely scattering material. His institutional profile also describes work on <optical parametric chirped pulse amplification> and rejection of <fluorescence> in <Raman spectroscopy>.<Pavel Matousek by the Central Laser Facility>[staff profile, scientific contributions]{ref}
The 2005 team measured a buried <trans-Stilbene> layer below $1\,\mathrm{mm}$ of <Poly(methyl methacrylate)> powder. The reported 19-fold contrast improvement concerned the buried layer's spectral visibility; it did not mean that the sample emitted 19 times as many Raman photons.<Subsurface Probing in Diffusely Scattering Media Using Spatially Offset Raman Spectroscopy by P. Matousek and others>[Abstract, sample and unprocessed contrast result]{ref}
For an original contrast example, a collection arrangement yielding 100 surface counts and 10 buried-layer counts has a buried-to-surface ratio $0.1$. Another arrangement yielding 10 surface counts and 4 buried-layer counts has ratio $0.4$. The ratio improves fourfold although the buried-layer count decreases. This illustrates why a collection geometry can make chemical identification easier without increasing absolute signal. Whether the second measurement is more precise also depends on <noise>, collection duration and background.
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