用于四进制数字调制的柔性透明全石墨烯电路
Flexible and Transparent All-Graphene Circuits for Quaternary Digital Modulations
摘要：
在现代通信系统中，调制是将基带信号（信息）嵌入载波中的关键功能，以便它可以通过诸如空气或电缆之类的介质成功地广播。因此，灵活的信号调制方案对于基于柔性电子器件的广泛应用是必不可少的。在这里，我们报告了一个完全可弯曲的全石墨烯调制器电路，能够首次用四进制数字信息编码载波信号。通过利用石墨烯晶体管中的双极性和非线性，我们展示了两种类型的四进制调制方案：4进制幅移键控（4-ASK）和正交相移键控（QPSK）。值得注意的是，4-ASK和QPSK可以分别仅用1个和2个全石墨烯晶体管来实现，与传统的数字调制器相比，这意味着电路复杂性的大幅降低。此外，该电路不仅是柔性的，而且由于它们的全石墨烯设计，每个组件（沟道，互连，负载电阻器和源极/漏极/栅极电极）都由石墨烯薄膜制成，因此具有高度透明性（~95%的透射率）。总之，这些结果代表了实现高速通信系统的重要一步，该系统可以单片集成在灵活和透明的平台上。
英文摘要：
In modern communication system, modulation is a key function that embeds the baseband signal (information) into a carrier wave so that it can be successfully broadcasted through a medium such as air or cables. A flexible signal modulation scheme is hence essential to wide range of applications based on flexible electronics. Here we report a fully bendable all-graphene modulator circuit with the capability to encode a carrier signal with quaternary digital information for the first time. By exploiting the ambipolarity and the nonlinearity in a graphene transistor, we demonstrated two types of quaternary modulation schemes: 4-ary amplitude-shift keying (4-ASK) and quadrature phase-shift keying (QPSK). Remarkably, 4-ASK and QPSK can be realized with just 1 and 2 all-graphene transistors, respectively, representing a drastic reduction in circuit complexity when compared with conventional digital modulators. In addition, the circuit is not only flexible but also highly transparent (~95% transmittance) owing to their all-graphene design with every component (channel, interconnects, load resistor, and source/drain/gate electrodes) fabricated from graphene films. Taken together, these results represent a significant step toward achieving a high speed communication system that can be monolithically integrated on a flexible and transparent platform.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
