SuperLens - View Bacteria Smaller Than 1000 Times The Width Of A Human Hair!
If there is anything that common man believes without seeing, is the existence of Bacteria and Viruses. Of course, it is a different story that they really exist. However, practically speaking only scientists get to see them. This was probably because of unavailability of a #-Link-Snipped-# which are portable and available to everyone. Now, a researcher at Michigan is determined to build such superlens with final aim of integrating it to your mobile phones.
#-Link-Snipped-#
In this illustration of Durdu Guney's theoretical metamaterial, the colors show magnetic fields generated by plasmons. The black arrows show the direction of electrical current in metallic layers, and the numbers indicate current loops that contribute to negative refraction. | Image Credit: Michgan Tech News
Yes, Superlens with resolution comparable to an #-Link-Snipped-# will soon be developed, thanks to the efforts by Durdu Guney, Asst professor of Electrical and Computer engineering at Michigan Institute of Technology. As of now, the lowest visible object seen with naked eye is limited by a phenomenon called 'Diffraction Limit'. This limit makes it impossible for us to see an object less than 200nm. A new lens developed on the basis of Plasmon can help us view things 1/1000th times the width of human hair!
Plasmons are the oscillating charges near the surfaces of thin metal film, which combine with special nanostructures. In an experiment, Guney found that when this Plasmon is excited with an electromagnetic field, it refracts light waves in a way not seen in nature. To state technically, the Plasmon achieves 'Negative Refraction'.
The device being developed by Guney is an economical one and will be affordable to anyone who can buy a cell phone. Moreover, the Superlens will find interesting applications. Perhaps it will not be proper to limit the uses of this lens to visibility. Being high resolution lenses, they can be used to construct very small specimens. For example, producing silicon chips using Superlens will be a common scene. The research by Durdu Guney is published in journal Physical Review under the title #-Link-Snipped-#. Let us see, until when Superlens makes its way to mobile phones. So that, we can upload the photos of our cells on Facebook!
#-Link-Snipped-#
In this illustration of Durdu Guney's theoretical metamaterial, the colors show magnetic fields generated by plasmons. The black arrows show the direction of electrical current in metallic layers, and the numbers indicate current loops that contribute to negative refraction. | Image Credit: Michgan Tech News
Yes, Superlens with resolution comparable to an #-Link-Snipped-# will soon be developed, thanks to the efforts by Durdu Guney, Asst professor of Electrical and Computer engineering at Michigan Institute of Technology. As of now, the lowest visible object seen with naked eye is limited by a phenomenon called 'Diffraction Limit'. This limit makes it impossible for us to see an object less than 200nm. A new lens developed on the basis of Plasmon can help us view things 1/1000th times the width of human hair!
Plasmons are the oscillating charges near the surfaces of thin metal film, which combine with special nanostructures. In an experiment, Guney found that when this Plasmon is excited with an electromagnetic field, it refracts light waves in a way not seen in nature. To state technically, the Plasmon achieves 'Negative Refraction'.
The device being developed by Guney is an economical one and will be affordable to anyone who can buy a cell phone. Moreover, the Superlens will find interesting applications. Perhaps it will not be proper to limit the uses of this lens to visibility. Being high resolution lenses, they can be used to construct very small specimens. For example, producing silicon chips using Superlens will be a common scene. The research by Durdu Guney is published in journal Physical Review under the title #-Link-Snipped-#. Let us see, until when Superlens makes its way to mobile phones. So that, we can upload the photos of our cells on Facebook!
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