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.
Excitation of a Si/SiGe quantum dot using an on-chip microwave antenna
E. Kawakami, P. Scarlino, L. R. Schreiber, J. R. Prance, D. E. Savage, M. G. Lagally, M. A. Eriksson, L. M. K. Vandersypen; Excitation of a Si/SiGe quantum dot using an on-chip microwave antenna. Appl. Phys. Lett. 23 September 2013; 103 (13): 132410. https://doi.org/10.1063/1.4821995
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