Materials science advances despite downturn

Discussion in 'General Science & Technology' started by disease, Feb 3, 2009.

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    Atomic memory: A little nonlinear help
    Michael Fleischhauer
    doi:10.1038/nphoton.2008.282
    Storing a light pulse in a vapour is by now a standard laboratory technique. For such optical memory to become truly practical, however, the fidelity of the technique has to be improved. Combining light storage with nonlinear wave mixing may offer a way forwards.

    Metamaterials: Loss as a route to transparency

    Natalia M. Litchinitser and Vladimir M. Shalaev
    doi:10.1038/nphoton.2008.280
    Practical low-loss metamaterials at optical frequencies may soon be realized thanks to optical parametric amplification that uses backwards propagation of a signal beam in negative-index metamaterials. Surprisingly, increasing losses at the idler frequency leads to broadband transparency or amplification at the signal frequency.

    Silicon photonics: A chip-scale one-way valve for light
    S. J. Ben Yoo
    doi:10.1038/nphoton.2008.279
    For integrated photonics to take off, light signals zooming around optical chips must be successfully isolated from one another. Scientists at Stanford University have now designed a miniature one-way valve for light that uses photonic transitions and is potentially compatible with silicon-chip CMOS fabrication processes.
     
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