Double-layer graphene optical modulator

Nano Lett. 2012 Mar 14;12(3):1482-5. doi: 10.1021/nl204202k. Epub 2012 Feb 16.


Here we report a high-performance double-layer graphene optical modulator. By using two graphene layers and an oxide layer in between to form a p-oxide-n like junction, this modulator operates at 1 GHz with a high modulation depth (~0.16 dB/μm) at a moderate drive voltage (~5 V). Benefited from the symmetrical band structure of graphene near Dirac point, such design eliminates the optical loss widely existing in silicon photonics and has advantages including small footprint, low energy consumption, and low insertion loss.

Publication types

  • Research Support, U.S. Gov't, Non-P.H.S.

MeSH terms

  • Equipment Design
  • Equipment Failure Analysis
  • Graphite / chemistry*
  • Nanostructures / chemistry*
  • Nanostructures / ultrastructure*
  • Optical Devices*
  • Particle Size
  • Semiconductors*
  • Telecommunications / instrumentation*


  • Graphite