Molecular Physics

In studying molecular relationships and chemical bonds, important experimental techniques include spectroscopy for new practical applications and devices in aerospace, green tech, and other industries.

SRI’s Molecular Physics Program provides government and commercial clients with fundamental and applied research in mass spectroscopy, laser sensors and diagnostics, atmospheric processes, combustion, and atomic, molecular, and optical physics.

Our innovative technologies include:

  • Jet-REMPI: SRI's patented technology uses supersonic nozzles and resonant laser ionization to detect hazardous air pollutants.

  • Molecular upconverters: molecular-sized (not particle-sized) reporters based on rare-earth ion chelates that produce visible light when illuminated by infrared lasers

  • Gas chromatography/field ionization mass spectroscopy (GC-FIMS): allows rapid identification of complex mixtures of hydrocarbons including crude oils or fuels


spectral glow

Spectral emission studies reveal meteorites’ contribution to airglow.

Products & Solutions

screenshot of LIFBASE chart

A database and spectral simulation tool for diatomic molecules.

Fluorsecence Image

Ideally, biological assays will yield quick, clear results through sensitive and selective detection in complex mixtures. Proximity assays are favored for facilitating high-throughput screening and revealing relative distances between analytes.

Press Releases

SRI International celebrates 50 years of its Molecular Physics Laboratory (MPL), which provides fundamental and applied research in areas such as atmospheric chemistry and physics; trace species detection; biomedical optics; and high-temperature materials.