Trapping cavitation bubbles with a self-focused laser beam.
We observed that laser-induced cavitation bubbles in water can be trapped in a self-focused laser beam. Both optical imaging and acoustic detection have been utilized to confirm bubble trapping. Transverse and longitudinal trapping forces were measured to be as large as 87 and 11 pN, respectively. This result is contrary to conventional wisdom, since the mechanism of trapping in conventional optical tweezers implies that a low-index particle (a bubble being the limiting case) should be antitrapped.
Ye
Jing Yong
JY
Center for Ultrafast Optical Science, University of Michigan, 2200 Bonisteel Boulevard, Ann Arbor, Michigan 48109-2099, USA. jyye@eecs.umich.edu
Chang
Guoqing
G
Norris
Theodore B
TB
Tse
Christine
C
Zohdy
Marwa J
MJ
Hollman
Kyle W
KW
O'Donnell
Matthew
M
Baker
James R
JR
D004867:Equipment Design; D019544:Equipment Failure Analysis; D005740:Gases / Q000737:chemistry* / Q000528:radiation effects*; D007834:Lasers; D008846:Micromanipulation / Q000295:instrumentation* / Q000379:methods*; D009038:Motion
D005740:Gases