Laser multiphoton charge separation spectroscopy



Chemistry and Materials

The Technology

Absorption spectroscopy methods are used for assaying components of a material responsive to absorption of electromagnetic radiation by the material. Common to practice of many of the methods, a material to be assayed is exposed to electromagnetic radiation at a plurality of different wavelengths of the radiation. The absorption of the electromagnetic radiation as a function of wavelength is referred to as an “absorption spectrum’ for the material. Absorption spectroscopy is typically used to assay materials in a gaseous state. Solids or liquids in their naturally occurring states under ambient conditions generally suffers from spectral line broadening that makes it complicated to use absorption spectroscopy to assay components.

The technology provides apparatus and methods for acquiring an absorption spectrum for a solid or liquid under ambient conditions responsive to a multi-photon ionization (MPI) process, and assaying components of the Solid responsive to the absorption spectrum. An MPI is a process in which a plurality of photons interacts with an atom or molecule to ionize it. In a two photon MPI process, a first photon raises an electron in a molecule to an excited state, and a second photon interacts with the molecule before the excited state decays, to add sufficient energy to the electron to free it from and ionize the molecule.


  • Improved spectral parameters: signal-to-noise ratio, peak density, spectral quality and the spectral quality density
  • Adjustable laser light source

 Applications and Opportunities

  • Resolving different molecules in a target material in various field such as explosives, detection of drugs, pharmaceutical analysis, forensic analysis and detection of pesticides.
arrow Business Development Contacts
Shikma Litmanovitz
Director of Business Development, Physical Science