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Sub-nanosecond light-pulse generation with waveguide-coupled carbon nanotube transducers
Felix Pyatkov1,2, Svetlana Khasminskaya1, Vadim Kovalyuk1,3
1Institute of Nanotechnology, Karlsruhe Institute of Technology, Karlsruhe 76021, Germany.
Beilstein Journal of Nanotechnology
|February 2, 2017
Summary
Waveguide-integrated single-walled carbon nanotubes (CNTs) efficiently convert electrical signals to optical pulses. These hybrid nanophotonic devices generate gigahertz light pulses, showing potential for on-chip optoelectronics.
Area of Science:
- Nanophotonics
- Optoelectronics
- Materials Science
Background:
- Carbon nanotubes (CNTs) are explored for optoelectronic applications.
- Integration of CNTs into optical waveguides enables new device functionalities.
- Fast electrical-to-optical signal conversion is crucial for nanophotonic circuits.
Purpose of the Study:
- To demonstrate the potential of waveguide-integrated single-walled CNTs as high-speed light emitters.
- To investigate the generation of optical pulse trains in the gigahertz range using hybrid nanophotonic devices.
- To assess the feasibility of CNTs for scalable on-chip light sources.
Main Methods:
- Fabrication of hybrid nanophotonic devices integrating single-walled CNTs into optical waveguides.
- Electrical biasing of the devices to induce light emission.
- Characterization of generated optical pulse trains, including frequency range and decay times.
Main Results:
- Waveguide-integrated single-walled CNTs function as effective light emitters.
- Optical pulse trains generated in the range of 200 kHz to 2 GHz.
- Observed optical pulse decay times below 80 picoseconds.
- Demonstration of a scalable fabrication approach for these hybrid devices.
Conclusions:
- Single-walled CNTs are promising high-speed transducers for light-pulse generation.
- Hybrid CNT-based nanophotonic devices show potential for gigahertz-range optical signal conversion.
- CNTs offer a viable route for developing nanoscale on-chip light sources for optoelectronic systems.
