TY - JOUR
T1 - Optical angular momentum transfer to microrotors fabricated by two-photon photopolymerization
AU - Asavei, Theodor
AU - Loke, Vincent
AU - Barbieri, Marco
AU - Nieminen, Timo
AU - Heckenberg, Norman
AU - Rubinsztein-Dunlop, Halina
PY - 2009
Y1 - 2009
N2 - We design, fabricate and test optically driven microrotors a few microns in size. The rotors are trapped and rotated in optical tweezers using an LG(02) Laguerre-Gaussian laser beam. We verify that we can accurately measure the total optical torque by measuring the spin angular momentum transfer for three different polarizations, by comparing the optical torque with the optical torque calculated using computational electrodynamics and the viscous drag torque determined from the rotation rate and computational fluid dynamics. The torque agrees with that expected from the design principles and electromagnetic modelling of the torque within the optical trap.
AB - We design, fabricate and test optically driven microrotors a few microns in size. The rotors are trapped and rotated in optical tweezers using an LG(02) Laguerre-Gaussian laser beam. We verify that we can accurately measure the total optical torque by measuring the spin angular momentum transfer for three different polarizations, by comparing the optical torque with the optical torque calculated using computational electrodynamics and the viscous drag torque determined from the rotation rate and computational fluid dynamics. The torque agrees with that expected from the design principles and electromagnetic modelling of the torque within the optical trap.
UR - http://iopscience.iop.org/1367-2630/11/9/093021
U2 - 10.1088/1367-2630/11/9/093021
DO - 10.1088/1367-2630/11/9/093021
M3 - Article
SN - 1367-2630
VL - 11
SP - 1
EP - 20
JO - New Journal of Physics
JF - New Journal of Physics
ER -