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Silicon Metal-oxide-semiconductor Quantum Dots for Single-electron Pumping
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Integrated hybrid silicon DFB laser-EAM array using quantum well intermixing.

Siddharth R Jain1, Matthew N Sysak, Geza Kurczveil

  • 1Department of Electrical Engineering, University of California, Santa Barbara, California 93106, USA. siddharth@ece.ucsb.edu

Optics Express
|July 13, 2011
PubMed
Summary
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This study integrates multiple bandgaps on a hybrid silicon platform using quantum well intermixing to create advanced photonic devices. This innovation enables broadband laser arrays and electro-absorption modulator arrays on a single chip for enhanced optical communication.

Area of Science:

  • Photonics
  • Materials Science
  • Semiconductor Devices

Background:

  • Hybrid silicon photonics enables integrated optical circuits.
  • Quantum well intermixing (QWI) is a technique for bandgap engineering.

Purpose of the Study:

  • To demonstrate multi-bandgap integration on a hybrid silicon platform using QWI.
  • To realize broadband distributed feedback (DFB) laser arrays and DFB-electro-absorption modulator (EAM) arrays on a single chip.

Main Methods:

  • Utilizing ion implantation enhanced disordering to define four distinct bandgaps.
  • Employing two bandgaps for the laser array to mitigate gain roll-off.
  • Using as-grown and blue-shifted bandgaps for the DFB-EAMs for gain and modulation.

Main Results:

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Last Updated: May 31, 2026

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Published on: June 3, 2015

Gradient Echo Quantum Memory in Warm Atomic Vapor
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Gradient Echo Quantum Memory in Warm Atomic Vapor

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  • A multi-channel DFB laser array with 13 lasers and a gain-bandwidth exceeding 90 nm.
  • An integrated DFB-EAM array featuring four devices with 14 dB DC extinction ratio at 4 V bias.
  • Successful implementation of multiple bandgaps for tailored optical performance.

Conclusions:

  • Multi-bandgap integration via QWI on hybrid silicon is feasible.
  • This approach enables high-performance integrated photonic devices for optical communication.