skip to main content

SciTech ConnectSciTech Connect

Title: Fast and sensitive detection of an oscillating charge

We investigate the high-frequency operation of a percolation field effect transistor to monitor microwave excited single trapped charge. Readout is accomplished by measuring the effect of the polarization field associated with the oscillating charge on the AC signal generated in the channel due to charge pumping. This approach is sensitive to the relative phase between the polarization field and the pumped current, which is different from the conventional approach relying on the amplitude only. Therefore, despite the very small influence of the single oscillating trapped electron, a large signal can be detected. Experimental results show large improvement in both signal-to-noise ratio and measurement bandwidth.
Authors:
;  [1] ;  [1] ;  [2]
  1. Department of Engineering, University of Cambridge, 9 JJ Thomson Avenue, Cambridge CB3 0FA (United Kingdom)
  2. (Korea, Republic of)
Publication Date:
OSTI Identifier:
22483183
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 107; Journal Issue: 2; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; AMPLITUDES; CURRENTS; DETECTION; FIELD EFFECT TRANSISTORS; MICROWAVE RADIATION; OPERATION; POLARIZATION; PUMPING; READOUT SYSTEMS; SIGNALS; SIGNAL-TO-NOISE RATIO; TRAPPED ELECTRONS; TRAPPING