Title :
Holographic Position Measurements of an Optically-Trapped Gold Nanoparticle Using Twilight-Field Microscope
Author :
Goto, Kazufumi ; Hayasaki, Yoshio
Author_Institution :
Center for Opt. Res. & Educ. (CORE), Utsunomiya Univ., Utsunomiya, Japan
Abstract :
We demonstrated three-dimensional (3D) position measurements of a gold nanoparticle held in optical tweezers in water. The position measurements were performed with an in-line, low-coherence digital holographic microscope with the twilight-field technique. The position of the optically-trapped nanoparticle with a diameter of 60 nm had an axial variation of 7.6 nm in the standard deviation when a 1070 nm laser beam with an intensity of more than 27 MW/cm2 was focused with a 1.25 NA objective lens.
Keywords :
gold; holography; laser beams; optical microscopes; position measurement; radiation pressure; Au; digital holographic microscope; holographic position measurements; laser beam; optical tweezers; optically-trapped gold nanoparticle; size 60 nm; three-dimensional position measurements; twilight-field microscope; twilight-field technique; water; wavelength 1070 nm; Charge carrier processes; Gold; High-speed optical techniques; Holographic optical components; Holography; Optical mixing; Optical sensors; digital holography; gold nanoparticle; optical manipulation; optical tweezers; three-dimensional target tracking;
Conference_Titel :
Optomechatronic Technologies (ISOT), 2014 International Symposium on
DOI :
10.1109/ISOT.2014.62
