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Applied Optics

Applied Optics


  • Vol. 44, Iss. 2 — Jan. 10, 2005
  • pp: 208–216

New model for the internal quantum efficiency of photodiodes based on photocurrent analysis

Alejandro Ferrero, Joaquin Campos, Alicia Pons, and Antonio Corrons  »View Author Affiliations

Applied Optics, Vol. 44, Issue 2, pp. 208-216 (2005)

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A new expression for the internal quantum efficiency of a photodiode is presented. It is obtained from the analysis of the photocurrent generated within the diode, considering the power and the cross-sectional diameter of the incident beam. The model explains variations of the internal quantum efficiency with irradiance that are not explained by other existing models, although this experimental fact was already known. The well-known phenomenon of supraresponsivity is also explained with this model. Finally, we show the dependence of the internal quantum efficiency on the variables involved in the model.

© 2005 Optical Society of America

OCIS Codes
(040.1880) Detectors : Detection
(120.1880) Instrumentation, measurement, and metrology : Detection
(120.5630) Instrumentation, measurement, and metrology : Radiometry

Original Manuscript: June 17, 2004
Revised Manuscript: September 28, 2004
Manuscript Accepted: October 1, 2004
Published: January 10, 2005

Alejandro Ferrero, Joaquin Campos, Alicia Pons, and Antonio Corrons, "New model for the internal quantum efficiency of photodiodes based on photocurrent analysis," Appl. Opt. 44, 208-216 (2005)

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