Carbon Nanotubes emit single photon
19 June 2008Physicists at the Institute of Quantum Electronics, Zurich, Switzerland have found one more application of carbon nanotubes (CNTs) and according to researchers it can be used as a single photon source. This non-classical optical emission from carbon nanotubes can help in developing efficient quantum communication network.
The research finding was recently published in Physical Review Letter. Sp far, researchers were able to identify a few single electron sources, however the motion of the emitted particles were restricted to a limited space only or the particle motion was quasi zero dimensional.
Researchers for this study took single walled carbon nanotbes (SWNTs) that have a diameter of 0.8 nm and average length of 500 nm. Researcher passed laser beam at low temperature of 4.2 K and found the wavelength of 880 nm of emitted light. With the invention, researchers are hoping to use carbon nanotubes for various applications including quantum cryptography and long-distance quantum communications.
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