"Noise is, by definition, any random and persistent disturbance, which interferes with the clarity of a signal. Modern electronic devices are designed to limit noise, and in most cases the classical forms of noise have been eliminated or greatly reduced through careful design. However, there is a fundamental, quite unavoidable type of noise, called quantum 1/f noise, which occurs at low frequencies and is a fundamental consequence of the discrete nature of the charge carriers themselves. This quantum 1/f noise is present in any physical cross section or process rate, such as carrier mobility, diffusion rates and scattering processes. Although quantum 1/f noise has been observed for nearly a century, there has been much debate over its origin and formulation. But as modern electronic devices require greater levels of performance and detection, the 1/f noise phenomenon has moved to the forefront, becoming the subject of intense research.
Here, for the first time, the quantum 1/f fluctuations present in both the dark current of the Quantum Well lntersubband Photodetector and the tunneling current of the Scanning Tunneling Microscope are investigated. Using the quantum 1/f theory, the quantum 1/f noise occurring in each of these devices is formulated. The theoretical noise results are then compared with the experimental findings of various authors with very good agreement. This important work provides a foundation for understanding quantum 1/f noise and its causes in the QWIP and STM devices, and could ultimately lead to improved technology and noise reduction in these devices and others"--Abstract, page iii.
Handel, Peter H.
DuBois, R. D. (Robert D.), 1951-
Ph. D. in Physics
Missouri University of Science and Technology
x, 208 pages
© 2010 Amanda Marie Truong, All rights reserved.
Dissertation - Restricted Access
Library of Congress Subject Headings
Scanning tunneling microscopy
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Link to Catalog RecordElectronic access to the full-text of this document is restricted to Missouri S&T users. Otherwise, request this publication directly from Missouri S&T Library or contact your local library. http://laurel.lso.missouri.edu/record=b8343187~S5
Truong, Amanda Marie, "Quantum 1/f noise in infrared detectors and scanning tunneling microscopes" (2010). Doctoral Dissertations. 1796.