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Trapping Center Controls Spin Direction

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In continuing work on the development of optically driven micromotors, physicists at Kyoto University in Japan have demonstrated that the location of the trapping center determines the direction of rotation of a chiral object. They reported their findings in the Dec. 16 issue of Applied Physics Letters. The scientists exposed chromosomes from African clawed frog sperm to the focused 1064-nm output of an Nd:YAG laser. They observed that the location of a 2-µm-diameter polystyrene bead on the helical molecules determined whether they rotated clockwise or counterclockwise around the light...Read full article

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    Published: February 2003
    Glossary
    nd:yag laser
    Nd:YAG laser refers to a solid-state laser that utilizes neodymium-doped yttrium aluminum garnet (Nd:Y3Al5O12) as the gain medium. This type of laser emits light at a wavelength of 1064 nanometers (nm) in the infrared region of the electromagnetic spectrum. Here's a breakdown of the components and operation of an Nd:YAG laser: Gain medium: The active medium of the laser is a crystal made of yttrium aluminum garnet (YAG) doped with neodymium ions (Nd3+). When pumped with energy, typically...
    chiral objectchromosomesNd:YAG laseroptically driven micromotorsResearch & TechnologyTech Pulsetrapping centerLasers

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