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Spin-mechanical coupling of an InAs quantum dot embedded in a mechanical resonator

Published

Author(s)

S G. Carter, A S. Bracker, Garnett W. Bryant, M Kim, C S. Kim, M Zalalutdinov, M. K. Yakes, C Czarnocki, J Casara, M Scheibner, D Gammon

Abstract

We demonstrate strain-induced coupling between a hole spin in a quantum dot and mechanical motion of a cantilever. The optical transitions of quantum dots integrated into GaAs mechanical resonators are measured synchronously with the motion of the driven resonators. In a Voigt magnetic field, both electron and hole spin splittings are measured, showing negligible change for the electron spin but a large change for the hole spin of up to 36%. This large effect is attributed to the stronger spin orbit interaction and higher effective mass of holes compared to electrons.
Citation
Physical Review Letters
Volume
121
Issue
24

Keywords

spin, quantum dots, mechanical resonators, photoluminescence, g-factor
Created December 14, 2018, Updated February 14, 2019