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.
Center for Ultrafast Optical Science, University of Michigan, 2200 Bonisteel Boulevard, Ann Arbor, Michigan 48109-2099, USA. jyye@eecs.umich.edu
Jing Yong
JY
Ye
Guoqing
G
Chang
Theodore B
TB
Norris
Christine
C
Tse
Marwa J
MJ
Zohdy
Kyle W
KW
Hollman
Matthew
M
O'Donnell
James R
JR
Baker
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