A new combination of materials can efficiently guide electricity and
light along the same tiny wire, a finding that could be a step towards
building computer chips capable of transporting digital information at
the speed of light.
Reporting today in The Optical Society's (OSA) high-impact journalOptica,
optical and material scientists at the University of Rochester and
Swiss Federal Institute of Technology in Zurich describe a basic model
circuit consisting of a silver nanowire and a single-layer flake of
molybendum disulfide (MoS2).
Using a laser to excite electromagnetic waves called plasmons at the
surface of the wire, the researchers found that the MoS2 flake at the
far end of the wire generated strong light emission. Going in the other
direction, as the excited electrons relaxed, they were collected by the
wire and converted back into plasmons, which emitted light of the same
wavelength.
"We have found that there is pronounced nanoscale light-matter
interaction between plasmons and atomically thin material that can be
exploited for nanophotonic integrated circuits," said Nick Vamivakas,
assistant professor of quantum optics and quantum physics at the
University of Rochester and senior author of the paper.
For more: http://ow.ly/B67QM
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