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InAs/GaAs quantum-dot superluminescent light-emitting diode monolithically grown on a Si substrate

Chen, S; Tang, M; Jiang, Q; Wu, J; Dorogan, VG; Benamara, M; Mazur, YI; ... Liu, H; + view all (2014) InAs/GaAs quantum-dot superluminescent light-emitting diode monolithically grown on a Si substrate. ACS Photonics , 1 (7) 638 - 642. 10.1021/ph500162a. Green open access

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Abstract

Building optoelectronic devices on a Si platform has been the engine behind the development of Si photonics. In particular, the integration of optical interconnects onto Si substrates allows the fabrication of complex optoelectronic circuits, potentially enabling chip-to-chip and system-to-system optical communications at greatly reduced cost and size relative to hybrid solutions. Although significant effort has been devoted to Si light generation and modulation technologies, efficient and electrically pumped Si light emitters have yet to be demonstrated. In contrast, III–V semiconductor devices offer high efficiency as optical sources. Monolithic integration of III–V on the Si platform would thus be an effective approach for realizing Si-based light sources. Here, we describe the first superluminescent light-emitting diode (SLD) monolithically grown on Si substrates. The fabricated two-section InAs/GaAs quantum-dot (QD) SLD produces a close-to-Gaussian emission spectrum of 114 nm centered at 1255 nm wavelength, with a maximum output power of 2.6 mW at room temperature. This work complements our previous demonstration of an InAs/GaAs QD laser directly grown on a Si platform and paves the way for future monolithic integration of III–V light sources required for Si photonics.

Type: Article
Title: InAs/GaAs quantum-dot superluminescent light-emitting diode monolithically grown on a Si substrate
Open access status: An open access version is available from UCL Discovery
DOI: 10.1021/ph500162a
Publisher version: http://dx.doi.org/10.1021/ph500162a
Language: English
Additional information: This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Keywords: Quantum dot, Superluminescent light-emitting diode, Si photonics, Monolithic integration
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Electronic and Electrical Eng
URI: https://discovery.ucl.ac.uk/id/eprint/1443481
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