When a laser beam with an elliptical polarization passes through a material with an optical birefringence, the ordinary and the extraordinary components of the laser beam experience different phase shifts. In this case, an optical torque due to angular momentum conservation can be exerted on the material. In this work, a, shrunken multi-lamellar vesicle (SMLV), which has a geometrically anisotropic internal nano-layered structure, is used as a form birefringence material. By trapping the SMLV using optical tweezers with a polarized laser beam, we rotate the SMLV. This rotational motion is explained by using a simple model with optical torque. In the model, lipid bi-layers are treated as thin parallel plates. This optically-induced rotational motion can be used to control the motion of biological materials.
Tuesday, February 2, 2010
Optical Torque Induced on a Geometrically Anisotropic Multi-Lamellar Vesicle with Form Birefringence
C. Ha, H.K. Pak, K. Kim
When a laser beam with an elliptical polarization passes through a material with an optical birefringence, the ordinary and the extraordinary components of the laser beam experience different phase shifts. In this case, an optical torque due to angular momentum conservation can be exerted on the material. In this work, a, shrunken multi-lamellar vesicle (SMLV), which has a geometrically anisotropic internal nano-layered structure, is used as a form birefringence material. By trapping the SMLV using optical tweezers with a polarized laser beam, we rotate the SMLV. This rotational motion is explained by using a simple model with optical torque. In the model, lipid bi-layers are treated as thin parallel plates. This optically-induced rotational motion can be used to control the motion of biological materials.
When a laser beam with an elliptical polarization passes through a material with an optical birefringence, the ordinary and the extraordinary components of the laser beam experience different phase shifts. In this case, an optical torque due to angular momentum conservation can be exerted on the material. In this work, a, shrunken multi-lamellar vesicle (SMLV), which has a geometrically anisotropic internal nano-layered structure, is used as a form birefringence material. By trapping the SMLV using optical tweezers with a polarized laser beam, we rotate the SMLV. This rotational motion is explained by using a simple model with optical torque. In the model, lipid bi-layers are treated as thin parallel plates. This optically-induced rotational motion can be used to control the motion of biological materials.
Subscribe to:
Post Comments (Atom)
No comments:
Post a Comment