Excitation of a Si/SiGe quantum dot using an on-chip microwave antenna.

Authors :: Kawakami, E.
Scarlino, P.
Schreiber, L. R.
Prance, J. R.
Savage, D. E.
Lagally, M. G.
Eriksson, M. A.
Vandersypen, L. M. K.
Source :: Applied Physics Letters; 9/23/2013, Vol. 103 Issue 13, p132410-132410-5, 1p, 3 Graphs
Publication Year :: 2013
Abstract: We report transport measurements on a Si/SiGe quantum dot subject to microwave excitation via an on-chip antenna. The response shows signatures of photon-assisted tunneling and only a small effect on charge stability. We also explore the use of a d.c. current applied to the antenna for generating tunable, local magnetic field gradients and put bounds on the achievable field gradients, limited by heating of the reservoirs. [ABSTRACT FROM AUTHOR]