Science of Nanoscale Systems and their Device Applications
Science of Nanoscale Systems and their Device Applications
2005 Research Results

Silica Nanowires
Liming Tong, Rafael R. Gattas, and Eric Mazur

Silica nanometer-diameter wires are used as building blocks for integrated microphotonics devices.

To use silica nanometer-diameter wires as building blocks for integrated microphotonics devices, the wires must be mounted on a substrate without losing their optical wave guiding properties. We address this problem by using silica aerogel as a substrate. Because the refractive index of an aerogel is very close to that of air, the optical guiding properties of aerogel-supported wires are virtually identical to those of air-clad ones. (a) is a scanning electron image of a 450-nm diameter silica wire supported on a substrate of silica aerogel. (b) is an optical microscopy image of a silica wire guiding light on the surface of silica aerogel.

 

  Last Modified June 20, 2006 by the NSEC Office.