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

Journal Article · Mon Dec 23 00:00:00 EST 2013 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4857895· OSTI ID:22224077

Matthews, M.; Henin, S.; Pomel, F.; Kasparian, J.; Wolf, J. -P. ^[1]; Théberge, F.; Daigle, J. -F. ^[2]; Lassonde, P.; Kieffer, J. -C. ^[3]

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1. Université de Genève, GAP-Biophotonics, Chemin de Pinchat 22, 1211 Geneva 4 (Switzerland)
2. Defence R and D Canada Valcartier, 2459 de la Bravoure Blvd., Quebec (Qc) G3J 1X5 (Canada)
3. INRS-EMT, 1650 Lionel Boulet Blvd., Varennes, Quebec (Qc) J3X1S2 (Canada)

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 NO{sub 2} and volatile organic compounds, producing condensable species.

• OSTI ID: 22224077
• Journal Information: Applied Physics Letters, Vol. 103, Issue 26; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
36 MATERIALS SCIENCE
BEAMS
COMPARATIVE EVALUATIONS
HYDROXYL RADICALS
LASERS
NANOSTRUCTURES
NITROGEN DIOXIDE
ORGANIC COMPOUNDS
OXIDATION
OZONE
PARTICLES
PHOTOLYSIS
PULSES
ULTRAVIOLET RADIATION
VOLATILITY
YIELDS