Stories tagged quantum

Mar
13
2010

Photon computing

Diamond nanowires emit photons: A Harvard-based team has manufactured a matrix of diamond nanowires with defects called nitrogen vacancies. When stimulated with green light, these defects emit one red photon at a time. Such a construct is promising for the new field of quantum computing
Diamond nanowires emit photons: A Harvard-based team has manufactured a matrix of diamond nanowires with defects called nitrogen vacancies. When stimulated with green light, these defects emit one red photon at a time. Such a construct is promising for the new field of quantum computingCourtesy Zina Deretsky, NSF

Most computers and communications rely upon controlling the flow of electrons. Such devices would be faster and more secure if they used particles of light (photons).
A research team led by Marko Loncar just published how a "diamond nanowire device acts as a nanoscale antenna that funnels the emission of single photons from the embedded color center into a microscope lens."

"This exciting result is the first time the tools of nanofabrication have been applied to diamond crystals in order to control the optical properties of a single defect," said Loncar.

Faster and more secure

Not only is communicating through optical fibers more efficient, there is no easy way for eavesdroppers to "tap the line".

"The resulting device may prove easy to couple into a standard optical fiber. This novel approach is a key technological step towards achieving fast, secure computing and communication." nsf.gov/news

Learn more about diamond-based nanowire devices

Digging deep into diamonds Harvard Gazette