Realization of a single-Cooper-pair Josephson laser
Realization of a single-Cooper-pair Josephson laser
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DOI：
10.1103/physrevb.90.020506
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发表时间：
2014-07-22
影响因子：
3.7
通讯作者：
Rimberg, A. J.
中科院分区：
文献类型：
--
作者：
Chen, Fei;Li, Juliang;Rimberg, A. J.
我们在高Q超导微波腔中嵌入了偏压库珀对晶体管(CPT)。当偏置电压赋予隧道库珀对的能量等于腔光子频率的倍数时，腔被泵浦到强烈的非平衡态。腔光子作用于CPT，使我们进入一个强关联的电子-光子传输区域。我们直接观察到了光子反作用对库珀对输运的影响，并看到了以受激输运过程为主的发射形式的单发射体激光的明显证据。
We have embedded a voltage-biased Cooper-pair transistor (CPT) in a high-Q superconducting microwave cavity. When the energy given to a tunneling Cooper pair by the voltage bias is equal to a multiple of the cavity photon frequency, the cavity is pumped to a strongly nonequilibrium state. The cavity photons act back on the CPT, allowing us to enter a regime of strongly correlated electronic-photonic transport. We directly observe the effects of photonic backaction on Cooper-pair transport, and see clear evidence for single-emitter lasing in the form of emission dominated by stimulated transport processes.