We designed, constructed, and tested a single-beam optical trapping instrument employing twin electro-optic deflectors (EODs) to steer the trap in the specimen plane. Compared with traditional instruments based on acousto-optic deflectors (AODs), EOD-based traps offer a significant improvement in light throughput and a reduction in deflection-angle (pointing) errors. These attributes impart improved force and position resolution, making EOD-based traps a promising alternative for high-precision nanomechanical measurements of biomaterials.
© 2008 Optical Society of America
Instrumentation, Measurement, and Metrology
Original Manuscript: January 7, 2008
Manuscript Accepted: February 6, 2008
Published: March 14, 2008
Vol. 3, Iss. 4 Virtual Journal for Biomedical Optics
Megan T. Valentine, Nicholas R. Guydosh, Braulio Gutiérrez-Medina, Adrian N. Fehr, Johan O. Andreasson, and Steven M. Block, "Precision steering of an optical trap by electro-optic deflection," Opt. Lett. 33, 599-601 (2008)