Villegas K H A, Kusmartsev F V, Luo Y, Savenko I G
Center for Theoretical Physics of Complex Systems, Institute for Basic Science (IBS), Daejeon 34126, Korea.
Micro/Nano Fabrication Laboratory (MNFL), Microsystem and Terahertz Research Center, Chengdu, China.
Phys Rev Lett. 2020 Feb 28;124(8):087701. doi: 10.1103/PhysRevLett.124.087701.
We propose a new type of optical transistor for a broadband amplification of terahertz radiation. It is made of a graphene-superconductor hybrid, where electrons and Cooper pairs couple by Coulomb forces. The transistor operates via the propagation of surface plasmons in both layers, and the origin of amplification is the quantum capacitance of graphene. It leads to terahertz waves amplification, the negative power absorption, and as a result, the system yields positive gain, and the hybrid acts like an optical transistor, operating with the terahertz light. It can, in principle, amplify even a whole spectrum of chaotic signals (or noise), which is required for numerous biological applications.
我们提出了一种新型光晶体管，用于太赫兹辐射的宽带放大。它由石墨烯 - 超导体混合材料制成，其中电子和库珀对通过库仑力耦合。该晶体管通过表面等离激元在两层中的传播来工作，放大的起源是石墨烯的量子电容。这导致太赫兹波放大、负功率吸收，结果是该系统产生正增益，并且这种混合材料就像一个光晶体管，与太赫兹光一起工作。原则上，它甚至可以放大整个混沌信号（或噪声）频谱，这是众多生物应用所需要的。
