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Proceedings Paper

Avalance photodetectors with an electrically isolated guard ring
Author(s): Babatunde Odubanjo; Chen-Show Wang; Wen I. Wang
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Paper Abstract

A 2D finite difference method is employed to demonstrate the effectiveness of the use of guard rings in reducing surface electric field along the semiconductor/insulator interface of planar avalanche photodetectors (APDs). Results from our modeling indicate a 20 percent edge field reduction in doubly-diffused devices as compared to singly-diffused p+n- junctions. The introduction of guard rings and double diffusion process is shown to provide an extra degree-of-freedom in the design of APDs, thus improved device characteristics against breakdown fields.

Paper Details

Date Published: 6 June 1997
PDF: 10 pages
Proc. SPIE 2994, Physics and Simulation of Optoelectronic Devices V, (6 June 1997); doi: 10.1117/12.275634
Show Author Affiliations
Babatunde Odubanjo, Columbia Univ. (United States)
Chen-Show Wang, Epitaxx Optoelectronics (United States)
Wen I. Wang, Columbia Univ. (United States)


Published in SPIE Proceedings Vol. 2994:
Physics and Simulation of Optoelectronic Devices V
Marek Osinski; Weng W. Chow, Editor(s)

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