{ "item_title" : "Production and Characterization of Femtosecond-Laser-Induced Air Plasma", "item_author" : [" David R. Armbruster "], "item_description" : "The purpose of this research was to produce, characterize, and optimize laser-induced air plasma as a preliminary step in using theplasma as a source of terahertz radiation. An 800 nanometer, 50 femtosecond, 0.75 Watt, pulsed Ti: Sapphire laser system was usedas the source infrared beam. A beam expander was used to expand the beam to a diameter of approximately 6.5 mm, and the beamwas focused through a 25 mm focal length achromatic lens to produce laser-induced plasma in ambient air. A 40 kHz ultrasonictransducer was used to detect the plasma. A second harmonic generation crystal was placed within the beam expander to generate400 nm blue light, enabling production of THz in the plasma via four wave mixing; a third-order nonlinear process. Whileplasma-produced THz was not detected, all the preliminary groundwork was accomplished, including full characterization of theplasma, blue light, and alignment of the system to generate and detect THz. The electro-optic detection apparatus was assembled, aligned and used to successfully detect a diagnostic THz signa", "item_img_path" : "https://covers1.booksamillion.com/covers/bam/1/28/830/866/1288308663_b.jpg", "price_data" : { "retail_price" : "15.95", "online_price" : "15.95", "our_price" : "15.95", "club_price" : "15.95", "savings_pct" : "0", "savings_amt" : "0.00", "club_savings_pct" : "0", "club_savings_amt" : "0.00", "discount_pct" : "10", "store_price" : "" } }

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