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Shot-noise-limited nanomechanical detection and radiation pressure backaction from an electron beam

Pairis, S.; Donatini, F.; Hocevar, M.; Tumanov, D.; Vaish, N.; Claudon, J.; Poizat, J.-P.; Verlot, P.


S. Pairis

F. Donatini

M. Hocevar

D. Tumanov

N. Vaish

J. Claudon

J.-P. Poizat

P. Verlot


Pierre Verlot
Project Leader


Detecting nanomechanical motion has become an important challenge in science and technology. Recently, electromechanical coupling to focused electron beams has emerged as a promising method adapted to ultralow scale systems. However the fundamental measurement processes associated with such complex interaction remain to be explored. Here we report a highly sensitive detection of the Brownian motion of μm -long semiconductor nanowires (InAs). The measurement imprecision is found to be set by the shot noise of the secondary electrons generated along the electromechanical interaction. By carefully analyzing the nanoelectromechanical dynamics, we demonstrate the existence of a radial backaction process that we identify as originating from the momentum exchange between the electron beam and the nanomechanical device, which is also known as radiation pressure.

Journal Article Type Article
Publication Date Mar 1, 2019
Journal Physical Review Letters
Print ISSN 0031-9007
Electronic ISSN 1079-7114
Publisher American Physical Society
Peer Reviewed Peer Reviewed
Volume 122
Issue 8
Article Number 083603
Keywords General physics and astronomy
Publisher URL


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