Highly Sensitive Photodetector Using Ultra-High-Density 1.5-μm Quantum Dots for Advanced Optical Fiber Communications

Toshimasa Umezawa; Kouichi Akahane; Naokatsu Yamamoto; Atsushi Kanno; Tetsuya Kawanishi

doi:10.1109/JSTQE.2014.2321288

Highly Sensitive Photodetector Using Ultra-High-Density 1.5-μm Quantum Dots for Advanced Optical Fiber Communications

Toshimasa Umezawa, Kouichi Akahane, Naokatsu Yamamoto, Atsushi Kanno, Tetsuya Kawanishi

Research output: Contribution to journal › Article

11 Citations (Scopus)

Abstract

We have fabricated a high-density 1.5-μm quantum dot photodetector for advanced optical fiber communications and have found unique optical properties, including avalanche multiplication. The structure of the absorption layer had stacked InAs/InGaAlAs layers with a high density of 1 × 10¹² cm^-2, which consisted of strained 1.5-μm InAs quantum dots and a strain compensation layer of InGaAlAs. A three times larger absorption coefficient than the InGaAs layer, an avalanche multiplication effect, and a low dark current are reported with InAs quantum dot conditions.

Original language	English
Article number	6808407
Journal	IEEE Journal on Selected Topics in Quantum Electronics
Volume	20
Issue number	6
DOIs	https://doi.org/10.1109/JSTQE.2014.2321288
Publication status	Published - 2014 Nov 1
Externally published	Yes

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Keywords

Avalanche photodiodes
optical fiber communications
photodetectors
quantum dots (QDs)

ASJC Scopus subject areas

Electrical and Electronic Engineering
Atomic and Molecular Physics, and Optics

Cite this

Umezawa, T., Akahane, K., Yamamoto, N., Kanno, A., & Kawanishi, T. (2014). Highly Sensitive Photodetector Using Ultra-High-Density 1.5-μm Quantum Dots for Advanced Optical Fiber Communications. IEEE Journal on Selected Topics in Quantum Electronics, 20(6), [6808407]. https://doi.org/10.1109/JSTQE.2014.2321288

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Access to Document

10.1109/JSTQE.2014.2321288