4-GHz modulation bandwidth of integrated 2 × 2 LED array

Chao Hsin Wu, Gabriel Walter, Han Wui Then, Milton Feng, Nick Holonyak

Research output: Contribution to journalArticlepeer-review


We demonstrate a 4.3-GHz high-speed "tiltedcharge" integrated 2 × 2 light-emitting diode (LED) array. With an array of four LEDs operating in parallel, the optical output power can be as much as tripled while the peak high-speed performance of its individual LED component is preserved. The gigahertz bandwidth is achieved by utilizing a "drain" layer, common to all the devices in the array, to enforce a "tilted-charge" condition where only fast recombination is employed for the modulation of optical output. The successful integration of four "tilted-charge" LEDs in a parallel array paves the way towards a simple viable solution for ultra-high-speed short range optical communication.

Original languageEnglish (US)
Article number5325805
Pages (from-to)1834-1836
Number of pages3
JournalIEEE Photonics Technology Letters
Issue number24
StatePublished - Dec 2009


  • Light-emitting diodes (LEDs)
  • Optical arrays
  • Optical communication

ASJC Scopus subject areas

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


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