Nano Bugle

A window into applied science supported by INL

Nanotweezers Trapping Nanoparticles

3D animation that shows the parts of a optical tweezers microscope


Since the invention of optical tweezers in the seventies, the inventors have managed to grab more and smaller objects. Until recently it was thought that the so-called diffraction limit imposed a barrier to this technology, preventing normal focus light beyond the range between 500 and 1000 nanometers.

 

A team of researchers from the Institute of Photonic Science led by Romain Quidant have managed to catch with light 50 nanometers length particles. The developed nanotweezers consist of a nanometric hole in a metal film. When laser light comes into contact with this structure something happens in the hole, a phenomenon known as plasmon resonance that can trap a particle placed in the area.

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October 26, 2009 - Posted by | Nanophotonic | ,

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