Tunable pulse delay and advancement device based on a cavity electromechanical system
Key Laboratory of Artificial Structures and Quantum Control (MOE), Department of Physics,
Shanghai Jiao Tong University - 800 Dong Chuan Road, Shanghai 200240, China
Accepted: 23 March 2011
We theoretically study the transmission of a weak probe field under the influence of a strong pump field in a coupled nanomechanical resonator-superconducting microwave cavity system. Using the standard input-output theory, we find that both pulse delay (slow-light effect) and advancement (fast-light effect) of the probe field can appear in this coupled system provided that we choose a suitable detuning of the pump field from cavity resonance. The magnitude of the delay (advancement) can be tuned continuously by adjusting the power of the pump field. This technique demonstrates great potential in applications including microwave phase shifter and delay line.
PACS: 85.85.+j – Micro- and nano-electromechanical systems (MEMS/NEMS) and devices / 42.50.Nn – Quantum optical phenomena in absorbing, amplifying, dispersive and conducting media; cooperative phenomena in quantum optical systems / 85.25.-j – Superconducting devices
© EPLA, 2011