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Leemker, Margot (2017)

High frequency amplifier for the detection of shot noise in Scanning Tunneling Microscopy

Bachelor thesis | Natuurkunde (BSc)
In this thesis we discuss the results of different resonant circuits to measure shot noise in an STM. We found two circuits where a change in the shot noise can be detected relatively easily. One of the circuits has a relatively large bandwidth and the other has a relatively large total signal. Furthermore we benchmarked an RF diode detector (envelope detector) to improve the measurement speed for shot noise measurements. We conclude that we need an additional amplifier to amplify the RF output signal of the resonant circuit $2\cdot 10^6$ to $3\cdot 10^6$ times to use the RF diode detector.
STM
shot noise
high frequency amplifier
cryogenic amplifier
resonator
Author
Leemker, Margot
Faculty
Faculty of Science
Supervisors
Allan, Milan
ECTS Credits
3
Language
en