Now showing items 1-6 of 6
Compact gas sensors based on mid-infrared frequency conversion of semiconductor lasers
Design, development, and application of novel all-solid-state spectroscopic gas sensors is reported. These compact instruments employ mid-infrared difference-frequency generation pumped by room-temperature semiconductor ...
Trace gas detection of chemical species
The theory of continuous wave difference frequency generation (DFG) is studied for a mixing of two waves in a nonlinear medium, the absorption effect of the material is included and optimization conditions are studied. ...
Studies of ionic alkali halide excimer molecules excited by laser-produced plasmas
New ionic states of alkali halide molecules, which are isoelectronic to the neutral rare gas halide molecules, have been generated by direct photoionization using the soft x-ray flux from a laser-produced plasma. The ...
Investigating the electronic properties of carbon nanostructures with scanning tunneling microscopy
Utilizing the scanning tunneling microscope, the electronic and structural properties of a variety of carbon based nanostructures, are explored. Among these, threefold electron scattering on graphite generated by vacancies ...
Difference frequency generation: Spectrometers and spectroscopy
The theory of difference frequency generation has been further developed. Derived from basic principles, the equations developed here accurately predict the conversion of power to the idler wave. Critical phasematching can ...
FT-ICR studies of gallium arsenide cluster ions
Gallium arsenide clusters have been studied on a Fourier transform ion cyclotron resonance(FT-ICR) mass spectrometer with an external supersonic cluster source. Reaction of GaAs cluster cations with ammonia revealed that ...