Spatial confinement of laser light in active random media
We have observed spatial confinement of laser light in micrometer-sized random media. The optical confinement is attributed to the disorder-induced scattering and interference. Our experimental data suggest that coherent amplification of the scattered light enhances the interference effect and helps the spatial confinement. Using the finite-difference time-domain method, we simulate lasing with coherent feedback in the active random medium.
Cao
H
Department of Physics and Astronomy, Materials Research Center, Northwestern University, Evanston, Illinois 60208, USA.
Xu
JY
Zhang
DZ
Chang
S
Ho
ST
Seelig
EW
Liu
X
Chang
RP