Integrated, Portable, Tunable, and Coherent Terahertz Sources and Sensitive Detectors Based on Layered Superconductors
Integrated, Portable, Tunable, and Coherent Terahertz Sources and Sensitive Detectors Based on Layered Superconductors
复制标题
DOI：
10.1109/jproc.2019.2958810
复制
发表时间：
2020-05-01
影响因子：
20.6
通讯作者：
Kadowaki, Kazuo
中科院分区：
文献类型：
--
作者：
Delfanazari, Kaveh;Klemm, Richard A.;Kadowaki, Kazuo
当前的紧凑型发射器和接收器技术在0.1和10 THz之间的太赫兹（THz）频率下通常是低效且不切实际的。因此，在成熟的微波技术和发达的光学技术之间存在差距。芯片内，集成的宽调谐和强大的量子源，相干辐射0.1和11 THz之间的THz波（潜在地可扩展到15 THz）并且具有>1 mW的潜在输出功率可以基于电子对跨本征约瑟夫森结（IJJ）的堆叠的量子隧穿来实现，所述本征约瑟夫森结（IJJ）自然地存在于层状高T-c超导Bi 2Sr 2CaCu 2 O 8 + δ（BSCCO）。这种器件被发现是特别有前途的固态THz源，能够桥接整个THz间隙，因为它们的宽频率可调谐范围上级它们的基于双折射的竞争对手，无论是单共振隧穿二极管（RTD）还是THz量子级联激光器（QCL）。由于BSCCO独特的电动力学特性，它们也可以作为开关电流检测器工作，为实现超高速电信、量子信息、片上光谱学以及无损传感、测试和成像等应用的片上太赫兹集成电路铺平了道路。本文综述了基于IJJ的THz源和探测器的发展历史和最新进展，重点介绍了IJJ THz器件在THz光谱学和各种THz成像系统（如反射、透射和计算机断层成像）中的应用。我们表明，具有亚厘米尺寸模块的紧凑型IJJ THz器件在许多应用中易于使用，因为它们可以被视为口袋量子THz手电筒。
Current compact emitter and receiver technologies are generally inefficient and impractical at terahertz (THz) frequencies between 0.1 and 10 THz. Hence, a gap exists between mature microwave and developed optical technologies. On-chip, integrated broadly tunable and powerful quantum sources that coherently radiate THz waves between 0.1 and 11 THz (potentially extendable to 15 THz) and with potential output power of >1 mW can be achieved based on quantum tunneling of electron pairs across the stack of intrinsic Josephson junctions (IJJs) naturally present in a single crystal of the layered high-T-c superconducting Bi2Sr2CaCu2O8+delta (BSCCO). Such devices have been found to be especially promising solid-state THz sources capable of bridging the entire THz gap, as their wide-frequency tunability range is superior to that obtained from their semiconducting-based rivals, either single resonant-tunneling diodes (RTDs) or THz-quantum cascade lasers (QCLs). Due to the unique electrodynamics of BSCCO, they can also be operated as switching current detectors, paving the way for the realization of on-chip THz-integrated circuits for applications in ultrahigh-speed telecommunications, quantum information, on-chip spectroscopy, and nondestructive sensing, testing, and imaging. This article reviews the history and recent advances in THz sources and detectors based on IJJs with a focus on the application of IJJ THz devices in THz spectroscopy and various types of THz imaging systems such as reflection, transmission, and computed tomography. We show that compact IJJ THz devices with sub-centimeter-sized modules are easy to use in many applications, as they can be regarded as pocket quantum THz torches.