Deviations in Nanostructures

 


A new study by the University of Twente and the e-science center in Amsterdam. The teams compared transference of light through a utopian model that had a real 3-D nanostructure.

The work was published in the journal Optics Express. The work was completed by Lars Corijn van Willenswaard, Stef Smeets, Nicholas Renaud and Willem Vos, among others.

The team used an innovative approach. They used a real 3-D nanostructure, Which they obtain through x-ray imaging. By using this nanostructure, they could compare a real structure with an idealized or “utopian” model. 

The teams findings shows that the real nanostructure displays a hefty restraint of light, which is completely missing in the Utopian design. 

Device predictability is a key factor in modern day electronics. From light emitting diodes to chip fabrication, deviations always appeared during nanofabrication.

Two nanostructures built side-by-side are not the same down to the atom level. One reason could be that the equipment slowly Varies in time during fabrication. Even if all devices worked perfectly, both chaos and entropy do not allow exact copies to be made. This makes devices less predictable overtime.

The Twente-Amsterdam Research allows for some understanding of these deviations. The team also opens the door to new device functionalities.

 Vos summarizes , “ there are major differences between the real and the utopian structure. For example, where the utopian structure forbid light from entering, the real structure, hold a high energy density of light. The real light distribution has a peculiar pattern where light is prevented from exiting to the right, as originally designed. The intense and confined light may even be used for completely new functions, such as an optical switch or sensor.”


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