Title :
The PSD General Response Function
Author :
Kong, Lingchen ; Li, Enpu ; Yang, Dexing ; Xing, Hui
Author_Institution :
Shaanxi Key Lab. of Opt. Inf. Technol., Northwestern Polytech. Univ., Xian, China
fDate :
3/1/2012 12:00:00 AM
Abstract :
The general response of a 1-D position-sensitive detector (PSD) is derived by solving the Lucovsky equation in a fully general way. A general light source is divided into many sections in space domain and pulse elements in time domain. Each section is regarded as a plane-wave element and each pulse as a square-wave pulse. By virtue of the linear superposition of the Green function, the general response is regarded as the summation of respective responses to those elements. The response indicates that a PSD is a decaying photocurrent accumulator, both in space and time domains. Results discussed in this paper are quite in agreement with the facts and the conclusions from the previous papers. In addition, analysis on the alternating current (ac) response characteristics by virtue of the general response shows that there is a hysteretic oscillation in accord with the light intensity variation and that the response is insensitive to high-frequency ac light signals.
Keywords :
Green´s function methods; position sensitive particle detectors; 1D position-sensitive detector; Green function; Lucovsky equation; decaying photocurrent accumulator; general response function; hysteretic oscillation; light intensity variation; plane-wave element; pulse elements; space domain; square-wave pulse; Frequency modulation; Gravity; Green function; Light sources; Noise; Photoconductivity; Time domain analysis; General response; Lucovsky equation (LE); linear superposition; position-sensitive detector (PSD); the Green function;
Journal_Title :
Electron Devices, IEEE Transactions on
DOI :
10.1109/TED.2011.2180022