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Proceedings Paper

Resonant-cavity photodetectors for optical communications
Author(s): Suhail S. Murtaza; K. Alex Anselm; Hui Nie; C. Hu; Joe C. Campbell; Ben G. Streetman; J. C. Bean; Larry J. Peticolas
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Paper Abstract

The rapid emergence of high-performance optical systems has accentuated the need for photodiodes with enhanced performance and functionality. In this paper we will describe a new class of photodiodes that utilize novel resonant-cavity structures to achieve high speed, high quantum efficiency, and a narrow spectral response which may prove useful for some wavelength division multiplexing applications. The resonant-cavity photodiode consists of a thin absorbing layer sandwiched between two dielectric mirrors. One advantage of this structure is that it can be utilized to circumvent the responsivity/bandwidth tradeoff inherent to conventional PIN photodiodes structures. For the typical normal-incidence photodiode a wide bandwidth necessitates a thin absorption layer which, in turn, results in low quantum efficiency. The resonant-cavity structure, on the other hand, effectively decouples the responsivity from the transit-time component of the bandwidth because the optical signal makes multiple passes across the thin absorbing layer inside the microcavity. The resonant- cavity approach has been utilized for p-i-n photodiodes, phototransistors, dual-wavelength photodetectors, avalanche photodiodes (APDs), and Schottky barrier photodiodes. In this paper we will concentrate on two specific devices, a Si1-x/Gex resonant-cavity p-i-n photodiode and a resonant-cavity APD with separate absorption and multiplication regions.

Paper Details

Date Published: 27 December 1995
PDF: 9 pages
Proc. SPIE 2613, Emerging Components and Technologies for All-Optical Networks, (27 December 1995); doi: 10.1117/12.228864
Show Author Affiliations
Suhail S. Murtaza, Univ. of Texas/Austin (United States)
K. Alex Anselm, Univ. of Texas/Austin (United States)
Hui Nie, Univ. of Texas/Austin (United States)
C. Hu, Univ. of Texas/Austin (United States)
Joe C. Campbell, Univ. of Texas/Austin (United States)
Ben G. Streetman, Univ. of Texas/Austin (United States)
J. C. Bean, AT&T Bell Labs. (United States)
Larry J. Peticolas, AT&T Bell Labs. (United States)

Published in SPIE Proceedings Vol. 2613:
Emerging Components and Technologies for All-Optical Networks
Emil S. Koteles; Alan Eli Willner, Editor(s)

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