Bottom-Emitting Coherently Coupled Vertical Cavity Laser Arrays

Zihe Gao, Bradley J. Thompson, Gautham Ragunathan, Matthew T. Johnson, Bibhudutta Rout, Kent D. Choquette

Research output: Contribution to journalArticlepeer-review


Two-dimensional coherently coupled photonic crystal ion-implanted bottom emitting vertical cavity surface emitting laser arrays are demonstrated. Subthreshold luminescence shows uniform current injection below threshold, benefiting from the improved contact alignment compared with the top emitting arrays. In-phase operation has been achieved in 2 × 2 and 3 × 3 arrays at lasing threshold. A remaining challenge is achieving uniform current distribution above lasing threshold for larger arrays due to the variation of series resistance through each of the elements of the arrays.

Original languageEnglish (US)
Article number7328711
Pages (from-to)513-515
Number of pages3
JournalIEEE Photonics Technology Letters
Issue number4
StatePublished - Feb 15 2016


  • phased arrays
  • semiconductor laser arrays
  • surface-emitting lasers

ASJC Scopus subject areas

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


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