Berlin 2012 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
TT: Fachverband Tiefe Temperaturen
TT 24: Nanomechanics
TT 24.3: Vortrag
Mittwoch, 28. März 2012, 10:00–10:15, H 3005
Optomechanically Induced Absorption and Parametric Effects in a Circuit Nano-Electromechanial System Driven on Blue Sideband — •Fredrik Hocke1, Xiaoqing Zhou3,4, Albert Schliesser3,4, Achim Marx1, Rudolf Gross1,2, Tobias Kippenberg3,4, and Hans Huebl1 — 1Walther-Meißner-Institut, Garching, Germany — 2Technische Universität München, Garching, Germany — 3Max-Planck-Institut für Quantenoptik, Garching, Germany — 4Ecole Polytechnique Fédérale de Lausanne, Switzerland
In the field of optomechanics, a light field trapped in an optical resonator is dynamically coupled to a mechanical mode, enabling cooling and amplification of mechanical motion. This concept of light matter interaction can be transferred to the microwave (MW) regime combining superconducting MW circuits with nanometer-sized mechanical beams. With such a system we demonstrate optomechanically induced absorption: In the presence of a blue-detuned pump field, constructive interference of two excitation pathways leads to a mechanically enhanced coupling of a probe field into the MW cavity. There, probe photons are dissipated to the environment, leading to reduced transmission of the probe tone. Our experimental findings quantitatively agree with model predictions, including narrowing of the absorption window with increased pump power.
We also discuss parametric effects when varying the pump power and driving the mechanical system via an additional AC-field at the mechanical resonance of fm = 1.45 MHz.
This work is supported by the Excellence Cluster "Nanosystems Initiative Munich (NIM)" .