title: Near-infrared emissions in single-bubble and multibubble sonoluminescence.
abstract: Comparisons of light emissions from multibubble and single-bubble sonoluminescence in the near-infrared band extending from 800 to 1050 nm have been investigated. In argon-water mixtures, single-bubble and multibubble spectra are similar in appearance. In sodium chloride-water mixtures, the multibubble spectrum shows evidence of the 3d-3p sodium emission line, whereas the single-bubble spectrum shows no such emission. For single bubbles, the near-infrared emissions change linearly with driving pressure. No evidence of near-infrared emissions are observed below the visible luminescence threshold.
authors.affiliation: Applied Physics Laboratory, University of Washington, 1013 NE 40th Street, Seattle 98105, USA.
authors.forename: T J
authors.initials: TJ
authors.lastname: Matula
authors.forename: J
authors.initials: J
authors.lastname: Guan
authors.forename: L A
authors.initials: LA
authors.lastname: Crum
authors.forename: A L
authors.initials: AL
authors.lastname: Robinson
authors.forename: L W
authors.initials: LW
authors.lastname: Burgess