Ultrastrong Optical Binding of Metallic Nanoparticles

作者：Demergis Vassili; Florin Ernst Ludwig^*

来源：Nano Letters, 2012, 12(11): 5756-5760.

DOI：10.1021/nl303035p

• Optical binding
• optical trapping
• optical molecules
• optical matter
• nanostructures
• photonics
• nanoparticle assembly

We demonstrate nanometer precision manipulation.. of multiple nanoparticles at room temperature. This is achieved using the optical binding force, which has been assumed to be weak compared to the optical gradient and scattering forces We show that trapping by the Optical binding forces can be over 20 times Stronger than by the gradient force and leads to ultrastable, rigid configurations Of multiple nanoparticles free in solution - a realization of "optical matter." In addition, we demonstrate a novel trapping Scheme where even smaller nanoparticles are trapped between larger "anchor" particles. Optical binding opens the door for the observation of collective phenomena of nanoparticles and the design of new Materials and devices made from optical matter.

• 出版日期2012-11