论文标题
高性能集成石墨烯电气调节剂在低温温度下
High performance integrated graphene electro-optic modulator at cryogenic temperature
论文作者
论文摘要
在低温下运行的高性能集成电气调节器对于低温互连至关重要。但是，现有的集成调节器在低温下的调制效率或带宽降低，因为它们依赖于随着温度降低的调整机制。石墨烯调节剂是一种有前途的选择，因为石墨烯的内在载流子迁移率在低温下增加。在这里，我们演示了一个基于石墨烯的集成电气调节器，其14.7 GHz带宽在4.9 K时超过了12.6 GHz的室温带宽。调制器的带宽仅受高接触电阻的限制，其内在的RC限制带宽为200 GHz，在4.9 k处。
High performance integrated electro-optic modulators operating at low temperature are critical for optical interconnects in cryogenic applications. Existing integrated modulators, however, suffer from reduced modulation efficiency or bandwidth at low temperatures because they rely on tuning mechanisms that degrade with decreasing temperature. Graphene modulators are a promising alternative, since graphene's intrinsic carrier mobility increases at low temperature. Here we demonstrate an integrated graphene-based electro-optic modulator whose 14.7 GHz bandwidth at 4.9 K exceeds the room-temperature bandwidth of 12.6 GHz. The bandwidth of the modulator is limited only by high contact resistance, and its intrinsic RC-limited bandwidth is 200 GHz at 4.9 K.
