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CeNS Colloquium

Kleiner Physikhörsaal
Date: 10.02.2017, Time: 15:30h

Waveguide Integrated Carbon Nanotube Light Sources

Prof. Ralph Krupke, KIT/TUM Darmstadt

We are interested in developing nanoscale transducers for future on‑chip data transmission with light and explore the use of carbon nanotubes as active element in photonic circuits. I will show how light from an electrically driven single-walled carbon nanotube can be coupled directly and efficiently into a photonic waveguide architecture and how waferscale, broadband sources can be realized and integrated with nanophotonic circuits allowing for propagation of light over centimeter distances [1]. I will also show how on-chip single-walled carbon nanotubes emitters can be combined with directional coupling devices as fundamental building blocks for carbon photonic systems [2]. Furthermore I will show how exceptionally narrow emission-linewidths can be achieved by integrating the carbon nanotubes emitter into a nanophotonic cavity [3]. If time allows I will also report on recent measurements on sub-nanosecond pulse generation with waveguide-coupled carbon nanotube transducers [4], and on light emission from nanocrystalline graphene as alternative emitter material [5].

Funding by the Volkswagen Foundation and support by the Helmholtz society through the program STN and by the KNMF is acknowledged.


[1] Waveguide-Integrated Light-Emitting Carbon Nanotubes, S. Khasminskaya, F. Pyatkov, B.S. Flavel, W.H.P. Pernice, R. Krupke, Advanced Materials 26 (2014) 3465

[2] Directional couplers with integrated carbon nanotube incandescent light emitters, R.G. Fechner, F. Pyatkov, S. Khasminskaya, B.S. Flavel, R. Krupke, W.H.P. Pernice, Optics Express 24 (2016) 966-974

[3] Cavity enhanced light emission from electrically driven carbon nanotubes, F. Pyatkov, V. Fütterling, S. Khasminskaya, B. Flavel, F. Hennrich, M.M. Kappes, R. Krupke, W.H.P. Pernice,
Nature Photonics 10 (2016) 420–427

[4] Sub nanosecond light pulse generation with waveguide-coupled carbon nanotube transducers
F. Pyatkov, S. Khasminskaya, V. Kovalyuk, F. Hennrich, M.M. Kappes, W. H. P. Pernice, R. Krupke
under review

[5] Light emission, light detection and strain sensing with nanocrystalline graphene, A. Riaz, F. Pyatkov, A. Alam, S. Dehm, A. Felten, V. Chakravadhanula, B. Flavel, C. Kübel, U. Lemmer, R. Krupke, Nanotechnology 26 (2015) 325202