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'Nanocamera' takes pictures at distances smaller than light's own wavelength
Date:7/18/2014

wanted to show the analogy between what we have made and traditional photographic film," Toussaint added. "There's a certain cool factor with this. However, we know that we're just scratching the surface since the use of plasmonic film for data storage at very small scales is just one application. Our pBNAs allow us to do so much more, which we're currently exploring."

The researchers noted that the fundamental bit size is currently set by the spacing of the antennas at 425-nm. However, the pixel density of the film can be straightforwardly reduced by fabricating smaller array spacing and a smaller antenna size, as well as using a more tightly focusing lens for recording.

"For a standard Blu-ray/DVD disc size, that amounts to a total of 28.6 gigabites per disk," Roxworthy added. "With modifications to array spacing and antenna features, it's feasible that this value can be scaled to greater than 75 gigabites per disk. Not to mention, it can be used for other exciting photonic applications, such as lab-on-chip nanotweezers or sensing."

"In our new technique, we use controlled heating via laser illumination of the nanoantennas to change the plasmonic response instantaneously, which shows an innovative but easy way to fabricate spatially changing plasmonic structures and thus opens a new avenue in the field of nanotech-based biomedical technologies and nano optics," said Abdul Bhuiya, a co-author and member of the research team.


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Contact: Kimani Toussaint
ktoussai@illinois.edu
217-244-4088
University of Illinois College of Engineering
Source:Eurekalert  

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