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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 19, Iss. 21 — Oct. 10, 2011
  • pp: 20604–20609

Multiplying optical tweezers force using a micro-lever

Chih-Lang Lin, Yi-Hsiung Lee, Chin-Te Lin, Yi-Jui Liu, Jiann-Lih Hwang, Tien-Tung Chung, and Patrice L. Baldeck  »View Author Affiliations

Optics Express, Vol. 19, Issue 21, pp. 20604-20609 (2011)

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This study presents a photo-driven micro-lever fabricated to multiply optical forces using the two-photon polymerization 3D-microfabrication technique. The micro-lever is a second class lever comprising an optical trapping sphere, a beam, and a pivot. A micro-spring is placed between the short and long arms to characterize the induced force. This design enables precise manipulation of the micro-lever by optical tweezers at the micron scale. Under optical dragging, the sphere placed on the lever beam moves, resulting in torque that induces related force on the spring. The optical force applied at the sphere is approximately 100 to 300 pN, with a laser power of 100 to 300 mW. In this study, the optical tweezers drives the micro-lever successfully. The relationship between the optical force and the spring constant can be determined by using the principle of leverage. The arm ratio design developed in this study multiplies the applied optical force by 9. The experimental results are in good agreement with the simulation of spring property.

© 2011 OSA

OCIS Codes
(140.7010) Lasers and laser optics : Laser trapping
(350.4855) Other areas of optics : Optical tweezers or optical manipulation

ToC Category:
Optical Trapping and Manipulation

Original Manuscript: August 15, 2011
Revised Manuscript: September 19, 2011
Manuscript Accepted: September 19, 2011
Published: October 3, 2011

Virtual Issues
Vol. 6, Iss. 11 Virtual Journal for Biomedical Optics

Chih-Lang Lin, Yi-Hsiung Lee, Chin-Te Lin, Yi-Jui Liu, Jiann-Lih Hwang, Tien-Tung Chung, and Patrice L. Baldeck, "Multiplying optical tweezers force using a micro-lever," Opt. Express 19, 20604-20609 (2011)

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