Yoctocalorimetry: phonon counting in nanostructures

Details Yoctocalorimetry: phonon counting in nanostructures Yoctocalorimetry: phonon counting in nanostructures

1998-11-17

arxiv.org/abs/cond-mat/9811256v2

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

27 pages, 8 figures

Scientific paper

10.1016/S0921-4526(98)01482-3

It appears feasible with nanostructures to perform calorimetry at the level of individual thermal phonons. Here I outline an approach employing monocrystalline mesoscopic insulators, which can now be patterned from semiconductor heterostructures into complex geometries with full, three- dimensional relief. Successive application of these techniques also enables definition of integrated nanoscale thermal transducers; coupling these to a dc SQUID readout yields the requisite energy sensitivity and temporal resolution with minimal back action. The prospect of phonon counting opens intriguing experimental possibilities with analogies in quantum optics. These include fluctuation-based phonon spectroscopy, phonon shot noise in the energy relaxation of nanoscale systems, and quantum statistical phenomena such as phonon bunching and anticorrelated electron-phonon exchange.

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