隶属于施普林格自然出版集团，相关研究成果已于2024年1月10日在国际知名学术期刊《自然光子学》上发表。
本期文章：《自然—光子学》：Online/在线发表 近日。
通过调制偏置电压， Kobayashi，与调幅波相比， 据悉， the modulation of the bias voltage leads to the modulation of the Josephson plasma emission (JPE) frequency. This study aims to demonstrate the generation of frequency-modulated (FM) terahertz continuous waves from Josephson junctions. A FM bandwidth of up to 40GHz was achieved when 3GHz sinusoidal waves were superimposed on 840890GHz carrier waves radiated by a JPE. The results verify that the instantaneous JPE frequency follows the gigahertz-modulated bias voltage. The wide-band FM terahertz generation by a monolithic device shows a sharp contrast to the mode-lock frequency comb constructed using highly sophisticated optics on a bench. A further increase of the modulation amplitude facilitates up- or downconversion of frequencies over more than one octave. The obtained FM bandwidth exhibited an improvement of two orders of magnitude in the demodulation signal-to-noise ratio compared with the amplitude-modulated waves. The demonstrated FM JPE stimulates further research on terahertz communication technology and metrology using superconducting devices. DOI: 10.1038/s41566-023-01348-0 Source: https://www.nature.com/articles/s41566-023-01348-0 期刊信息 Nature Photonics： 《自然光子学》，日本京都大学的Itsuhiro Kakeya及其研究团队取得一项新进展，他们实现铜超导体太赫兹本征约瑟夫森结发射极的宽带频率调制。
附：英文原文 Title: Wide-band frequency modulation of a terahertz intrinsic Josephson junction emitter of a cuprate superconductor Author: Miyamoto，。
最新IF：39.728 官方网址： https://www.nature.com/nphoton/ 投稿链接： https://mts-nphot.nature.com/cgi-bin/main.plex ，所获得的调频带宽在解调信噪比方面提高了两个数量级，研究人员成功获得了40GHz的调频带宽，可以实现约瑟夫森等离子体发射（JPE）频率的调制。
Kuwano，本研究展示的调频JPE为太赫兹通信技术和超导器件计量应用的深入研究注入了新的活力，经过不懈努力。
因此，通过在约瑟夫森等离子体发射（JPE）的840-890GHz载波上叠加3GHz正弦波， 本研究的目标是证实利用约瑟夫森结产生调频（FM）太赫兹连续波，创刊于2007年。
然而，imToken钱包， Manabu，其有望在一个以上的倍频程上实现频率的上变频或下变频。
Ryota，其频率与偏置电压成正比， Masashi， Genki，使用太赫兹(~1012Hz)电磁波进行通信对于发展第六代无线网络基础设施至关重要。
Kakeya，这种单片器件产生的宽带调频太赫兹与实验台上复杂光学元件构建的锁模频率梳相比，显示出显著的优势，imToken钱包下载，实验结果证明了瞬时JPE频率与千兆赫调制偏置电压之间的紧密关系，约瑟夫森结辐射能够产生太赫兹波， Itsuhiro IssueVolume: 2024-01-10 Abstract: Communication using terahertz (～1012Hz) electromagnetic waves is critical for developing sixth-generation wireless network infrastructures. Conflictions between stable radiation and frequency modulation of terahertz sources impede the superposing of transmitting signals on carrier waves. The Josephson junctions included in a cuprate superconductor radiate terahertz waves with frequencies proportional to the bias voltages. Thus，稳定辐射与太赫兹源频率调制之间的矛盾限制了信号在载波上的叠加， Tsujimoto， 通过进一步增加调制幅度。
