Papers by David Armbruster
Frontiers in Optics 2008/Laser Science XXIV/Plasmonics and Metamaterials/Optical Fabrication and Testing, 2008
The purpose of this research was to produce, characterize, and optimize laserinduced air plasma a... more The purpose of this research was to produce, characterize, and optimize laserinduced air plasma as a preliminary step in using the plasma as a source of terahertz radiation. An 800 nanometer, 50 femtosecond, 0.75 Watt, pulsed Ti:Sapphire laser system was used as the source infrared beam. A beam expander was used to expand the beam to a diameter of approximately 6.5 mm, and the beam was focused through a 25 mm focal length achromatic lens to produce laser-induced plasma in ambient air. A 40 kHz ultrasonic transducer was used to detect the plasma. A second harmonic generation crystal was placed within the beam expander to generate 400 nm blue light, enabling production of THz in the plasma via four wave mixing; a third-order nonlinear process.
MLO: medical laboratory observer
MLO: medical laboratory observer, 1992
MLO: medical laboratory observer, 1997
On-site workplace drug testing is fast becoming an attractive alternative to traditional methodol... more On-site workplace drug testing is fast becoming an attractive alternative to traditional methodologies. Among the reasons for its growing popularity is that these assays can be performed quickly and inexpensively by nonlaboratorians using simple equipment.
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Papers by David Armbruster