867f09hw3 - determine the following parameters for...

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ELEG 867 - Devices for Light Detection from the Submillimeter to the Ultraviolet – Fall 2009 Homework #3 - due Friday, 25 September 2009, in class Photodetectors 1. Consider a generic intrinsic photoconductor as described in Fig. 2.2 of the text. Assuming uniform conditions, (such as the illumination, electron-hole pair generation rate, and internal fields), derive an expression for photocurrent, and show that the photoconductive gain G appears naturally. 2. Using equations for the G-R noise and the responsivity, derive Eqn. (2.52) of text. 3. Based on the photodetector example (2.4) on page 53 of text, carry out the steps and show the work to
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Unformatted text preview: determine the following parameters for operation at = 1 m . (a) responsivity S R ; (b) photoconductive gain G; (c) dark resistance R d ; (d) Johnson noise current (rms) I N in 1 Hz noise bandwidth; (e) noise equivalent power NEP; (f) detectivity D; and (g) the D*. 4. Problem 3.1, from Rieke, p. 76. Homework assignments will appear on the web at: http://www.ece.udel.edu/~kolodzey/courses/eleg867f09.html. Note: On each homework and report submission, please give your name, the due date, assignment number and the course number....
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