SKM 2023 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 18: Nano- and Optomechanics

TT 18.1: Vortrag

Montag, 27. März 2023, 17:15–17:30, HSZ 201

Microwave optomechanics of the transversal carbon nanotube vibration — •Akong Loh, Fabian Stadler, Furkan Özyigit, Nicole Kellner, Niklas Hüttner, and Andreas K. Hüttel — Institute for Experimental and Applied Physics, University of Regensburg, 93040 Regensburg, Germany

Recently, optomechanical coupling of a carbon nanotube and a coplanar microwave resonator has been achieved[1,2]. In this case, the nanotube acts as a mechanical resonator as well as a quantum dot. The coupling is enhanced by several order of magnitude by via the nonlinearity of Coulomb blockade. This novel optomechanical system presents several interesting features. For optimized paramters, e.g., strong optomechanical coupling (with hybridization of vibrons and photons) and the quantum coherent limit (where manipulation is faster than thermal decoherence) could be reached. Significant improvements of our microwave resonators have recently been achieved. Ongoing work aims to optimize the mechanical resonator, via improving the nanotube growth and the transfer of the nanotubes onto the resonator chip, as well as the cryogenic millikelvin setup for the measurements.
[1] S. Blien et al., Nat. Comm. 11, 1636 (2020)
[2] N. Hüttner et al., in preparation.