Waveguide avalanche photodetector using quantum-dot superlattice for optical fiber communications

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

Waveguide avalanche photodetector using quantum-dot superlattice for optical fiber communications

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

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

We report a 1.5-μm high-responsivity waveguide quantum dot photodetector with an avalanche multiplication effect and high frequency response. With two different QD layer conditions, the responsivity and avalanche multiplication were compared and discussed. The high responsivity of 0.58 A/W and avalanche multiplication factor of around 10 could be obtained. Then, it was inferred that the impact ionization process in the quantum dot superlattice would be created in the depletion layer region, not in the InGaAlAs SL region.

Original language	English
Title of host publication	Conference on Lasers and Electro-Optics/Pacific Rim, CLEOPR 2017
Publisher	OSA - The Optical Society
Volume	Part F122-CLEOPR 2017
ISBN (Electronic)	9781557528209
Publication status	Published - 2017 Jan 1
Event	Conference on Lasers and Electro-Optics/Pacific Rim, CLEOPR 2017 - Singapore, Singapore Duration: 2017 Jul 31 → 2017 Aug 4

Other

Other	Conference on Lasers and Electro-Optics/Pacific Rim, CLEOPR 2017
Country	Singapore
City	Singapore
Period	17/7/31 → 17/8/4

Keywords

Avalanche multiplication
Frequency response
High density quantum dot
Photodetector

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Mechanics of Materials

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Waveguide avalanche photodetector using quantum-dot superlattice for optical fiber communications. / Umezawa, Toshimasa; Akahane, Kouichi; Matsumoto, Atsushi; Yamamoto, Naokatsu; Kawanishi, Tetsuya.

Conference on Lasers and Electro-Optics/Pacific Rim, CLEOPR 2017. Vol. Part F122-CLEOPR 2017 OSA - The Optical Society, 2017. s0963.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Umezawa, T, Akahane, K, Matsumoto, A, Yamamoto, N & Kawanishi, T 2017, Waveguide avalanche photodetector using quantum-dot superlattice for optical fiber communications. in Conference on Lasers and Electro-Optics/Pacific Rim, CLEOPR 2017. vol. Part F122-CLEOPR 2017, s0963, OSA - The Optical Society, Conference on Lasers and Electro-Optics/Pacific Rim, CLEOPR 2017, Singapore, Singapore, 17/7/31.

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abstract = "We report a 1.5-μm high-responsivity waveguide quantum dot photodetector with an avalanche multiplication effect and high frequency response. With two different QD layer conditions, the responsivity and avalanche multiplication were compared and discussed. The high responsivity of 0.58 A/W and avalanche multiplication factor of around 10 could be obtained. Then, it was inferred that the impact ionization process in the quantum dot superlattice would be created in the depletion layer region, not in the InGaAlAs SL region.",

keywords = "Avalanche multiplication, Frequency response, High density quantum dot, Photodetector",

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AU - Umezawa, Toshimasa

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AU - Kawanishi, Tetsuya

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N2 - We report a 1.5-μm high-responsivity waveguide quantum dot photodetector with an avalanche multiplication effect and high frequency response. With two different QD layer conditions, the responsivity and avalanche multiplication were compared and discussed. The high responsivity of 0.58 A/W and avalanche multiplication factor of around 10 could be obtained. Then, it was inferred that the impact ionization process in the quantum dot superlattice would be created in the depletion layer region, not in the InGaAlAs SL region.

AB - We report a 1.5-μm high-responsivity waveguide quantum dot photodetector with an avalanche multiplication effect and high frequency response. With two different QD layer conditions, the responsivity and avalanche multiplication were compared and discussed. The high responsivity of 0.58 A/W and avalanche multiplication factor of around 10 could be obtained. Then, it was inferred that the impact ionization process in the quantum dot superlattice would be created in the depletion layer region, not in the InGaAlAs SL region.

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KW - Frequency response

KW - High density quantum dot

KW - Photodetector

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BT - Conference on Lasers and Electro-Optics/Pacific Rim, CLEOPR 2017

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