论文标题
在Moiré平面带中同步Bloch振荡的免费载体
Synchronizing Bloch-oscillating free carriers in moiré flat bands
论文作者
论文摘要
在直接电流下实现自由载体的BLOCH振荡，这是一种长期的集体多体行为，由于对频段性质的严格限制，这是充满挑战的。我们认为，Moiré石墨烯中的平坦乐队满足了观察Bloch振荡的基本要求，为以前的工作中使用的堆叠量子井提供了一种吸引人的替代品，旨在访问该制度。 Bloch振荡的Moiré超级晶格发出了一种不一致的频率的梳状光谱，这是将直接电流转换为高频电流并在THZ域中开发宽频放大器的感兴趣属性。振荡可以通过光子或等离子谐振器中的振荡器模式进行同步。谐振态度中的相位共同集体振荡提供了电流泵送的THZ激光的实现。
Achieving Bloch oscillations of free carriers under a direct current, a long-sought-after collective many-body behavior, has been challenging due to stringent constraints on the band properties. We argue that the flat bands in moiré graphene fulfill the basic requirements for observing Bloch oscillations, offering an appealing alternative to the stacked quantum wells used in previous work aiming to access this regime. Bloch-oscillating moiré superlattices emit a comb-like spectrum of incommensurate frequencies, a property of interest for converting direct currents into high-frequency currents and developing broad-band amplifiers in THz domain. The oscillations can be synchronized through coupling to an oscillator mode in a photonic or plasmonic resonator. Phase-coherent collective oscillations in the resonant regime provide a realization of current-pumped THz lasing.
