SKM 2023 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 16: Poster: Transport

TT 16.14: Poster

Montag, 27. März 2023, 15:00–18:00, P2/OG4

Integrating coplanar resonators and carbon nanotubes for microwave optomechanics — 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

The optomechanical coupling of a carbon nanotube and a superconducting coplanar microwave resonator has been achieved [1,2] in our previous work. The carbon nanotube acts as a quantum dot, responding to gate voltages in a highly nonlinear way. This can be used to enhance the optomechanical coupling strength by several orders of magnitude. Recent work has focused on improving the electronic properties of the microwave resonators, to maximize quality factors in presence of the nanotube coupling electrodes. Currently, we redevelop insertion of carbon nanotubes as the mechanical counterpart. Here, we give an overview of recent improvements and ongoing measurements on this fascinating optomechanical system: at proper optimization, it can have figures of merit close to several interesting parameter regimes, as, e.g., strong optomechanical coupling (with hybridization of vibrons and photons) and the quantum coherent limit (where manipulation is faster than thermal decoherence).

[1] S. Blien et al., Nat. Comm. 11, 1636 (2020)

[2] N. Hüttner et al., in preparation.