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New Mexico State University
Department of Physics
Emeriti

Dr. Robert Armstrong

Ph.D., John Hopkins University (1970)


Department of Physics

Office: Gardiner Hall 103

MSC 3D
New Mexico State University
PO Box 30001
Las Cruces, NM
88003-8001

Phone: 575-646-4308
Phone: 575-646-5692, Lab Phone

FAX: 575-646-1934

Personal Web Page >>
E-mail: roarmstr@nmsu.edu

Robert Armstrong
Office Hours Fall 2010

TBA

About

Professor Armstrong's research is primarily nonlinear optics. Rather than study the nonlinearities themselves, Armstrong is more interested in their dependence on the type of media, in particular on novel classes including nanostructured, micro-structured, and fractal media. A well known example of a medium effect on a nonlinear optical process, second harmonic generation, is forbidden in symmetric bulk media, but permitted in nanostructured media. In particular, Armstrong's interests lie in exploiting the novel optical sensors and optical amplifiers. In the sensor development area, resonant properties, characteristic of many of these media, have led to the development of ultra-sensitive optical sensors that may be used to detect spectral emissions from extremely low, (including single-molecule-level) concentrations of molecular species. If the sensor is fabricated using nanostructured metallic particle using Surface Enhanced Raman Scattering (SERS), provides additional sensor gain.