Silicon-germanium nanostructures for light emitters and on-chip optical interconnects

Leonid Tsybeskov, David J. Lockwood

Research output: Contribution to journalArticlepeer-review

77 Scopus citations

Abstract

In this paper, we review the present status of light emitters based on SiGe nanostructures. In order to be commercially valuable, these light emitters should be efficient, fast, operational at room temperature, and, perhaps most important, compatible with the "mainstream" complementary metal-oxide-semiconductor (CMOS) technology. Another important requirement is in the emission wavelength, which should match the optical waveguide low-loss spectral region, i.e., 1.3-1.6 μm. Among other approaches, epitaxially grown Si/SiGe quantum wells and quantum dot/quantum well complexes produce efficient photoluminescence and electroluminescence in the required spectral range. Until recently, the major roadblocks for practical applications of these devices were strong thermal quenching of the luminescence quantum efficiency and a long carrier radiative lifetime. The latest progress in the understanding of physics of carrier recombination in Si/SiGe nanostructures is reviewed, and a new route toward CMOS compatible light emitters for on-chip optical interconnects is proposed.

Original languageEnglish (US)
Article number5075757
Pages (from-to)1284-1303
Number of pages20
JournalProceedings of the IEEE
Volume97
Issue number7
DOIs
StatePublished - Jul 2009

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering

Keywords

  • Electroluminescence
  • Germanium
  • Light emission
  • Nanoclusters
  • Nanostructures
  • Photoluminescence
  • Quantum dots
  • Quantum wells
  • Silicon
  • Silicon-germanium

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