Demonstration of efficient nonreciprocity in a microwave optomechanical circuit
| Autor: | Katarina Cicak, John Teufel, Florent Lecocq, Gabriel A. Peterson, Jose Aumentado, Raymond W. Simmonds |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Quantum Physics
business.industry Computer science Physics QC1-999 Isolator FOS: Physical sciences Physics::Optics General Physics and Astronomy 02 engineering and technology Lossy compression 021001 nanoscience & nanotechnology 01 natural sciences Magnetic field Frequency conversion 0103 physical sciences Optoelectronics Isolation (database systems) Quantum Physics (quant-ph) 010306 general physics 0210 nano-technology business Quantum Optomechanics Microwave |
| Zdroj: | Physical Review X, Vol 7, Iss 3, p 031001 (2017) |
| Popis: | The ability to engineer nonreciprocal interactions is an essential tool in modern communication technology as well as a powerful resource for building quantum networks. Aside from large reverse isolation, a nonreciprocal device suitable for applications must also have high efficiency (low insertion loss) and low output noise. Recent theoretical and experimental studies have shown that nonreciprocal behavior can be achieved in optomechanical systems, but performance in these last two attributes has been limited. Here we demonstrate an efficient, frequency-converting microwave isolator based on the optomechanical interactions between electromagnetic fields and a mechanically compliant vacuum gap capacitor. We achieve simultaneous reverse isolation of more than 20 dB and insertion loss less than 1.5 dB over a bandwidth of 5 kHz. We characterize the nonreciprocal noise performance of the device, observing that the residual thermal noise from the mechanical environments is routed solely to the input of the isolator. Our measurements show quantitative agreement with a general coupled-mode theory. Unlike conventional isolators and circulators, these compact nonreciprocal devices do not require a static magnetic field, and they allow for dynamic control of the direction of isolation. With these advantages, similar devices could enable programmable, high-efficiency connections between disparate nodes of quantum networks, even efficiently bridging the microwave and optical domains. 9 pages, 6 figures |
| Databáze: | OpenAIRE |
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