Hannover 2016 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
Q: Fachverband Quantenoptik und Photonik
Q 49: Optomechanics I
Q 49.8: Vortrag
Donnerstag, 3. März 2016, 12:45–13:00, f342
Optimizing electro-optomechanical transduction using equivalent circuits — •Emil Zeuthen1, Albert Schließer1, Jacob M. Taylor2, and Anders S. Sørensen1 — 1Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark — 2Joint Quantum Institute & Joint Center for Quantum Information and Computer Science, National Institute of Standards and Technology and the University of Maryland, College Park, Maryland 20742 USA
A mechanical oscillator can serve as an efficient link between electromagnetic modes of different frequencies. We find that such a transducer can be characterized by two key parameters, the signal transfer efficiency and added noise temperature. In terms of these, we evaluate its performance in various tasks ranging from classical signal detection to quantum state conversion between, e.g., superconducting circuitry and traveling optical signals. Having established the requirements for efficient performance, we turn to the question of optimization. We address this by developing a unifying equivalent-circuit formalism for electro-optomechanical transducers. This approach accommodates arbitrary linear circuits and integrates the novel optomechanical transduction functionality into the well-established framework of electrical engineering, thereby facilitating its implementation in potential applications such as nuclear magnetic resonance imaging and radio astronomy. We consider such optomechanical sensing of weak electrical signals and discuss how the equivalent circuit formalism can be used to optimize the electrical circuit design. We also discuss the parameter requirements for transducing microwave photons in the quantum regime.