Light, sound, action: Extending the life of acoustic waves on microchips

EurekAlert  May 6, 2020
An international team of researchers (Australia, Germany, Denmark) propose to use phonons to store and transfer information that chips receive from fibre-optic cables. They show a way to counteract the intrinsic acoustic decay of the phonons in a waveguide by resonantly reinforcing the acoustic wave via synchronized optical pulses. They experimentally demonstrated coherent on-chip storage in amplitude and phase up to 40 ns, 4 times the intrinsic acoustic lifetime in the waveguide. Through theoretical considerations, they anticipate that this concept allows for storage times up to microseconds within realistic experimental limitations while maintaining a GHz bandwidth of the optical signal…read more. Open Access TECHNICAL ARTICLE

Concept of the refreshed optoacoustic memory. Credit: Optica Vol. 7, Issue 5, pp. 492-497 (2020)

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