Investigation on the operations of a multiplexed charge-locking device

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• Mr. Moda Cao,
• Wednesday 24 January 2018, 14:00-15:00
• Mott Seminar Room (Mott Building Room 531), Cavendish Laboratory.

If you have a question about this talk, please contact Dr Kaveh Delfanazari.

The architecture of a multiplexed charge-locking device [1] could enable the control of a large number of gates with reduced number of electrical contacts, representing itself as a useful tool for up-scaling of a quantum dot system. Nevertheless, two problems were found from previous operation experience of such devices, which hinder their further applications in forming larger arrays of quantum dots. The first problem is a drift in voltage from a floating (charged) gate, which has been discussed in the above reference. The second problem is the leakage of charge (from the first addressed gate) when, for example, two next to nearest gates are addressed successively, partly due to the nature of the multiplexer. In this presentation, I will show various operations of the multiplexed charge-locking device towards resolving the above two problems.

[1] R. K. Puddy et al, Appl. Phys. Lett. 107, 143501 (2015)

This talk is part of the Semiconductor Physics Group Seminars series.

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