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Regular version of the site

Article

Sub-nanosecond light-pulse generation with waveguide-coupled carbon nanotube transducers

Beilstein Journal of Nanotechnology. 2017. Vol. 8. No. 1. P. 38-44.
Pyatkov F., Khasminskaya S., Kovalyuk V., Hennrich F., Kappes M., Goltsman G., Pernice W., Krupke R.

Carbon nanotubes (CNTs) have recently been integrated into optical waveguides and operated as electrically-driven light emitters under constant electrical bias. Such devices are of interest for the conversion of fast electrical signals into optical ones within a nanophotonic circuit. Here, we demonstrate that waveguide-integrated single-walled CNTs are promising high-speed transducers for light-pulse generation in the gigahertz range. Using a scalable fabrication approach we realize hybrid CNT-based nanophotonic devices, which generate optical pulse trains in the range from 200 kHz to 2 GHz with decay times below 80 ps. Our results illustrate the potential of CNTs for hybrid optoelectronic systems and nanoscale on-chip light sources.