Welcome to the Ritchie Group website!


We apply optical techniques to explore and exploit the way light interacts with matter. Our experiments include spectroscopic analysis of gases, photolysis, and reaction dynamics, as well as manipulation of colloidal systems using optical tweezers.

Information on MEDIXHALE (Medical Diagnostics Based on Exaled-Air Analysis with Laser Absorption Spectroscopy).


Congratulations to Teri and Nick on completing their Part II projects!

We are delighted to welcome Dr. James Fletcher, our newest post-doctoral research associate.

Congratulations to Dr. James Kirkbride on passing his viva!


Recent Publications

Cavity-enhanced near-infrared laser absorption spectrometer for the measurement of acetonitrile in breath Michele Gianella and Grant A.D. Ritchie, Analytical Chemistry (2015) DOI: 10.1021/acs.analchem.5b01341

RF noise induced laser perturbation for improving the performance of non-resonant cavity enhanced absorption spectroscopy L. Ciaffoni, J. Couper, G. Hancock, R. Peverall, P. A. Robbins, G.A.D. Ritchie, Opt. Exp. (2014) DOI:10.1364/OE.22.017030