Selective trapping of multiple particles by volume speckle field.
We suggest a new approach for selective trapping of light absorbing particles in gases by multiple optical bottle-beam-like traps created by volume speckle field. We demonstrate stable simultaneous confinement of a few thousand micro-particles in air with a single lowpower laser beam. The size distribution of trapped particles exhibits a narrow peak near the average size of an optical speckle. Thus, the speckleformed traps act as a sieve with the holes selecting particles of a similar size.
Shvedov
Vladlen G
VG
Laser Physics Center, Research School of Physics and Engineering, The Australian National University, Canberra ACT 0200, Australia. vgs124@physics.anu.edu.au
Rode
Andrei V
AV
Izdebskaya
Yana V
YV
Desyatnikov
Anton S
AS
Krolikowski
Wieslaw
W
Kivshar
Yuri S
YS