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Hearing the Highest Pitches

14 July 2008
Two research groups show how to detect sound waves that have wavelengths as short as the spacing between atoms in a solid and frequencies in the terahertz range.
article link PRL (4 July 2008)
article link PRL (11 July 2008)
laser hitting aluminum

Spin Control

1 July 2008
A new system can smoothly guide a pendulum from stable to unstable motion and find the border between the two states. Similar set-ups might someday improve testing of auto or airplane parts.
article link PRL (20 June 2008)
article link videos
stable and unstable pendulum

A Nanoscale Tractor Beam

25 June 2008
A new theory on the interactions of nanoparticles with laser light predicts some surprising effects when more than one particle is involved, such as a particle being drawn toward the source of the beam, against the flow of photons.
article link PRB (June 2008)
nozzle spraying water
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