Berlin 2018 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 33: Nanotubes and Nanoribbons
TT 33.8: Vortrag
Dienstag, 13. März 2018, 11:15–11:30, H 0110
Coupling a terahertz cavity to a carbon nanotube quantum dot — •F. Valmorra1,2, K. Yoshida3, L. Contamin1, T. Cubaynes1, M. Dartiailh1, M. Desjardins1, S. Massabeau1, K. Hirakawa3, J. Mangeney1, A. Cottet1, and T. Kontos1 — 1Laboratoire Pierre Aigrain, CNRS UMR 8551, ENS, 24 rue Lhomond, 75005 Paris, France — 2Early-Postdoc Fellow of the Swiss National Science Foundation — 3Institute of Industrial Science, University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8505, Japan
One of the most interesting aspects of science is the fundamental, coherent interaction of light and matter, down to the quantum level of countable photons and single electronic transitions. Such kind of investigations gave birth to the field of cavity-Quantum ElectroDynamics and later to circuit-QED. Mesoscopic QED uses quantum dots as the matter part, aiming at the realisation of spin-qubits and at the investigation of fundamental physical phenomena. While these investigations have focussed on the microwave range, it comes natural to extend them to the THz, where the energies of the quantum dots realised in a carbon nanotube lie. We thus couple the QD to a THz-split-ring resonator: the transport characterisation of the device shows a region of suppressed conductance, close to zero bias, as large as the photon energy. This gap is reminiscent of the Franck-Condon blockade effect transposed to photons. Such system paves the way towards more complex condensed matter studies and the demonstration of strong coupling pushing forward optoelectronics and quantum optics in the THz frequency range.