High Bandwidth GaN-Based Micro-LEDs for Multi-Gb/s Visible Light Communications

Ricardo X G Ferreira, Enyuan Xie, Jonathan J D McKendry, Sujan Rajbhandari, Hyunchae Chun, Grahame Faulkner, Scott Watson, Anthony E. Kelly, Erdan Gu, Richard V. Penty, Ian H. White, Dominic C. O'Brien, Martin D. Dawson

Research output: Contribution to journalArticlepeer-review

308 Citations (SciVal)


Gallium-nitride (GaN)-based light-emitting diodes (LEDs) are highly efficient sources for general purpose illumination. Visible light communications (VLC) uses these sources to supplement existing wireless communications by offering a large, licence-free region of optical spectrum. Here, we report on progress in the development of micro-scale GaN LEDs (micro-LEDs), optimized for VLC. These blue-emitting micro-LEDs are shown to have very high electrical-to-optical modulation bandwidths, exceeding 800 MHz. The data transmission capabilities of the micro-LEDs are illustrated by demonstrations using ON-OFF-keying, pulse-amplitude modulation, and orthogonal frequency division multiplexing modulation schemes to transmit data over free space at the rates of 1.7, 3.4, and 5 Gb/s, respectively.

Original languageEnglish
Article number7492305
Pages (from-to)2023-2026
Number of pages4
JournalIEEE Photonics Technology Letters
Issue number19
Early online date15 Jun 2016
Publication statusPublished - 1 Oct 2016


  • Bandwidth
  • GaN
  • micro light-emitting diodes
  • OFDM
  • optical communication
  • PAM
  • visible-light communication

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering


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