期刊
IEEE JOURNAL OF QUANTUM ELECTRONICS
卷 53, 期 4, 页码 -出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JQE.2017.2711246
关键词
Quantum optics; nonreciprocity; langevin equations
资金
- Laboratory of Photonic and Quantum Measurements at EPFL
A system scheme is presented, which allows non-reciprocal wave transmission or directional amplification of electromagnetic signals, using a boxed four-node method. Edges represent strong hopping interactions and diagonals stand for weak parametric interactions. Using careful optimization of values for design parameters, we are able to obtain non-reciprocity in excess of 12 and 130 dB for intrinsic and extrinsic configurations at identical input/output frequencies. For the directional amplification, an isolation as high as 40 dB is demonstrated with the forward/backward gains of +/- 20 dB. Cascading two such systems potentially can offer high isolations at high gains.
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