On-chip polarized light emitters based on (6,5) chirality-sorted carbon nanotube aligned arrays

Abstract

Electrically driven light-emitters based on carbon nanotubes are highly promising candidates for on-chip optical interconnection and nanophotonics. Here, we fabricated on-chip polarized light-emitters based on (6,5) chirality-sorted carbon nanotube aligned arrays obtained via an evaporation-induced self-assembly method. Electroluminescence results shows an impact excitation dominant mechanism originated from (6,5) defect-brightened dark exciton emission and trion emission. The degree of polarization of the carbon nanotube aligned arrays is characterized quantitatively and the average value is ∼76.8%. The importance of parallelism and orientation of nanotubes when integrated with on-chip waveguides is also discussed.