Nonlinear photonic diode behavior in energy-graded core-shell quantum well semiconductor rod

Suk Min Ko, Su-Hyun Gong, Yong Hoon Cho

Research output: Contribution to journalArticle

10 Citations (Scopus)


Future technologies require faster data transfer and processing with lower loss. A photonic diode could be an attractive alternative to the present Si-based electronic diode for rapid optical signal processing and communication. Here, we report highly asymmetric photonic diode behavior with low scattering loss, from tapered core-shell quantum well semiconductor rods that were fabricated to have a large gradient in their bandgap energy along their growth direction. Local laser illumination of the core-shell quantum well rods yielded a huge contrast in light output intensities from opposite ends of the rod.

Original languageEnglish
Pages (from-to)4937-4942
Number of pages6
JournalNano Letters
Issue number9
Publication statusPublished - 2014 Sep 10
Externally publishedYes



  • asymmetric waveguide
  • GaN/InGaN core-shell quantum well
  • nonlinear
  • Photonic diode

ASJC Scopus subject areas

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering

Cite this