Browse Physics

A model for analyzing materials using ultrasound shows that the seemingly random fluctuations in the data may contain information about the microscopic structure.

Phonon lasing—coherent amplification of phonons by stimulated emission—has been achieved in a purely acoustic analog of a three-level laser scheme.

Coherent amplification of phonons may become possible with monolithic semiconductor laser cavities that support both optical and acoustic modes.

A projectile striking granular material generates a series of acoustic pulses that propagate down from the impact site.

The propagation of sound waves can be dramatically altered by forcing them to follow meandering channels, according to simulations.

Cloaking devices made of a composite of soft and hard materials can divert elastic vibrational waves around an object as though it wasn’t there.

By tracking the tiny displacements of a nanoparticle trapped in an optical tweezer, scientists are able to detect the faintest of acoustic waves.

Some ferroelectric crystals can remember sounds.

Experiments on large bubbles may put to rest one of the mysteries surrounding the emission of light by bubbles in water.

Physicists have demonstrated the first acoustic solitary waves in air–waves that can travel long distances without changing shape.