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HEMT Amplified SET Measurements of Individual InGaAs Quantum Dots



Kevin Osborn, Mark W. Keller, Richard Mirin


A High Electron Mobility Transistor (HEMT) is used with a Single Electron Transistor (SET) to measure single electrons tunnelling into individual InGaAs quantum dots. The SET detects the charge motion as an electron tunnels from an underlying n-doped layer, into a quantum dot lying in an intermediate layer. A HEMT on the He$^3$ stage with the SET, is used to extend the measurement bandwidth to 400 kHz. We demonstrate this technique with a measurement of the Stark shift in the first electron state in the quantum dot as a function of lateral electric field.
Proceedings Title
Conference Dates
July 26-30, 2004
Conference Location
Flagstaff, AZ, USA


Osborn, K. , Keller, M. and Mirin, R. (2006), HEMT Amplified SET Measurements of Individual InGaAs Quantum Dots, ICPS-27, Flagstaff, AZ, USA, [online], (Accessed April 18, 2024)
Created August 24, 2006, Updated October 12, 2021