title: Size of the light-emitting region in a sonoluminescing bubble.
abstract: The size of the light-emitting region is a key parameter toward understanding the light-emitting processes in a sonoluminescing bubble. Here we present measurements of interference effects from particles with a diameter of approximately 2 microm situated 6-10 microm from a sonoluminescing bubble. From the angular size of the pattern and from an estimated distance to the particles we conclude that the light-emitting region of a sonoluminescing bubble is smaller than commonly believed [see, e.g., Nature (London) 398, 402 (1999)]. We argue that an upper limit of the size of the light-emitting region is approximately 200 nm.
authors.affiliation: Biocomplexity Lab, Niels Bohr Institute, Blegdamsvej 17, DK-2100 Copenhagen Ø, Denmark.
authors.forename: Jeppe Seidelin
authors.initials: JS
authors.lastname: Dam
authors.forename: Mogens T
authors.initials: MT
authors.lastname: Levinsen