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Cooperative effect of ultraviolet and near-infrared beams in laser-induced condensation

Matthews, Mary
Théberge, F.
Lassonde, P.
Daigle, J.-F.
Kieffer, J.-C.
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Published in Applied Physics Letters. 2014, vol. 103, no. 26, p. 264103
Abstract We demonstrate the cooperative effect of near infrared (NIR) and ultraviolet (UV) beams on laser-induced condensation. Launching a UV laser after a NIR pulse yields up to a 5-fold increase in the production of nanoparticles (25–300 nm) as compared to a single NIR beam. This cooperative effect exceeds the sum of those from the individual beams and occurs for delays up to 1 μs. We attribute it to the UV photolysis of ozone created by the NIR pulses. The resulting OH radicals oxidize NO2 and volatile organic compounds, producing condensable species.
Keywords OzoneUltraviolet lightNanoparticlesCondensationPhotodissociation
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MATTHEWS, Mary et al. Cooperative effect of ultraviolet and near-infrared beams in laser-induced condensation. In: Applied Physics Letters, 2014, vol. 103, n° 26, p. 264103. https://archive-ouverte.unige.ch/unige:37064

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Deposited on : 2014-06-03

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