Article
Computer Science, Hardware & Architecture
Priyangshu Sen, Viduneth Ariyarathna, Arjuna Madanayake, Josep M. Jornet
Summary: Communication at terahertz frequencies is seen as a key component in wireless networking and future systems. The need for programmable hardware and architectures at these frequencies is highlighted in order to optimize the move to terahertz band. The paper presents a versatile testbed for wireless experimental research above 100 GHz, showcasing its capabilities through implementation details and early experimental results.
Article
Computer Science, Information Systems
Qing Xia, Zahed Hossain, Michael Medley, Josep Miquel Jornet
Summary: This paper introduces a link-layer synchronization and medium access control (MAC) protocol for very-high-speed wireless communication networks in the Terahertz band. Through analysis and extensive simulations with ns-3, the proposed protocol is shown to maximize the successful packet delivery probability without compromising the achievable throughput in THz-band communication networks.
IEEE TRANSACTIONS ON MOBILE COMPUTING
(2021)
Article
Optics
Yan Wang, Shaohe Li, Hui Wang, Bowen Tan, Xingcheng Xiang, Runfeng Su, Caihong Zhang, Biaobing Jin, Jian Chen, Peiheng Wu
Summary: PB metasurfaces show superior performance in the THz region with an ultra-thin structure, achieving broadband and efficient wavefront manipulation. By spatially rotating orientation, beam steering and superposition of vortex waves can be achieved.
Article
Computer Science, Information Systems
Mohammed H. Alsharif, Mahmoud A. M. Albreem, Ahmad A. A. Solyman, Sunghwan Kim
Summary: Future networks communication scenarios by the 2030s will require higher bandwidths, which can be provided by the Terahertz (THz) frequency band, making it a key direction for the development of future networks.
CMC-COMPUTERS MATERIALS & CONTINUA
(2021)
Article
Computer Science, Theory & Methods
Li-Hsiang Shen, Kai-Ten Feng, Lajos Hanzo
Summary: As the fifth-generation systems are being deployed globally, researchers are already exploring the possibilities of next-generation solutions. This article provides a critical evaluation of various research facets in this field, including next-generation architectures, networking, IoT, wireless positioning and sensing, and the application of deep learning in 6G networks. It highlights the diverse architectures and cooperative networks that are supported by different access and transmission mechanisms. The vulnerabilities of these techniques are also addressed, along with the need for multi-component Pareto optimization.
ACM COMPUTING SURVEYS
(2023)
Article
Computer Science, Hardware & Architecture
Duschia Bodet, Jacob Hall, Priyangshu Sen, Rachel Johnson, Isabelle Brandicourt, Xavier Cantos Roman, Omar Shoura, Josep Miquel Jornet
Summary: The Terahertz band is considered a key asset for unlocking the next generation of wireless communication systems. This paper presents an extensive data set that will allow the wireless community to experimentally explore solutions related to ultrabroadband time, frequency and phase synchronization, channel estimation and equalization, and modulation.
Article
Computer Science, Hardware & Architecture
Stefano Bonafini, Claudio Sacchi, Riccardo Bassoli, Koteswararao Kondepu, Fabrizio Granelli, Frank H. P. Fitzek
Summary: Efficient wireless and long-haul connections are urgently needed for mobile connectivity on Mars. A flexible 6G-based 3D network solution utilizing drones, small satellites, and orbiters is proposed to support low-latency wireless links. Trade-offs when selecting orbital altitude are analyzed. Performance evaluation is conducted through end-to-end emulation trials.
Article
Materials Science, Multidisciplinary
Han Jing, Zhong Min
Summary: Electromagnetically induced transparency (EIT) effect provides a vast space for the development of new optical devices. This study proposes and verifies an all-dielectric metamaterial based on the EIT effect. The amplitude and resonant frequency of the transmission window can be actively controlled, and the group delay can be switched. The frequency selectivity can be achieved by changing the diameter of the silicon array, and the resonant frequency can be shifted by immersing the sample in oil with different refractive indices. The metamaterial sample shows potential applications in various fields such as light buffering, 6G/terahertz communications, and ultrafast devices.
Article
Engineering, Electrical & Electronic
Simon Tarboush, Hadi Sarieddeen, Hui Chen, Mohamed Habib Loukil, Hakim Jemaa, Mohamed-Slim Alouini, Tareq Y. Al-Naffouri
Summary: The article introduces TeraMIMO, a MATLAB simulator for statistical THz channels that simulates ultra-massive MIMO antenna configurations to overcome limitations in THz communications distances. The simulation considers different components and implementations, as well as various THz-specific constraints.
IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY
(2021)
Article
Optics
Wonkyoung Lee, Seungjun Han, Sang-Rok Moon, Jongwoo Park, Sanghwa Yoo, Heuk Park, Joon Ki Lee, Kyoungsik Yu, Seung Hyun Cho
Summary: This study demonstrates coherent terahertz wireless communication using a silicon photonics integrated circuit and advanced digital signal processing. The structure and fabrication of the dual-parallel Mach-Zehnder modulator are optimized to improve modulation efficiency and reduce optical loss. Advanced DSP compensates for IQ imbalance and phase noise by orthogonally decoupling the IQ components in the frequency domain.
Article
Engineering, Electrical & Electronic
Tong Li, Hang Chen, Fengqiang Zhang, Jia Zhang, Zhenlong Wang
Summary: This paper presents the design of a three-layered structure metamaterial for an ultra-broadband terahertz absorber. The absorber achieves high absorption rates over a wide frequency range and is insensitive to different polarization modes, which is significant for practical applications.
OPTICAL AND QUANTUM ELECTRONICS
(2022)
Article
Materials Science, Multidisciplinary
Guozheng Wu, Chao Li, Dong Wang, Wenya Chen, Song Gao, Haijun Guo, Chunwei Zhang, Shijing Guo
Summary: In this paper, a terahertz absorber with switchable absorption modes is introduced using patterned graphene-vanadium dioxide. By thermally tuning vanadium dioxide and electrically controlling graphene, the device can switch between two distinct absorption modes. The device achieves an ultra-broadband absorption with a bandwidth of 4.62 THz when the conductivity of vanadium dioxide is 200,000 S/m and a narrower bandwidth of 0.95 THz when the conductivity is 200 S/m. Controlling the Fermi energy of graphene allows for control over the amplitude and frequency shift of the broadband mode. The device also exhibits remarkable symmetry and robust absorption characteristics. Potential applications include broadband mirrors and electromagnetic shielding.
DIAMOND AND RELATED MATERIALS
(2023)
Article
Chemistry, Analytical
Haider W. Oleiwi, Hamed Al-Raweshidy
Summary: This paper suggests integrating cooperative SWIPT and H-NOMA technologies using THz frequency bands to improve the energy/spectral efficiencies and system specifications of 5G communication systems. The proposed technique significantly improves energy and spectral efficiencies compared to related work, reducing hardware and computational complexity while enhancing reliability and transmission rates.
Article
Engineering, Electrical & Electronic
Ian F. Akyildiz, Chong Han, Zhifeng Hu, Shuai Nie, Josep Miquel Jornet
Summary: This paper reviews the research achievements of THz band communications in the past decade and identifies the open challenges that need to be addressed, covering various aspects such as devices, channel behavior, communication and networking, and physical testbeds. These research findings will serve as the foundation for 6G and Beyond wireless systems in the next decade.
IEEE TRANSACTIONS ON COMMUNICATIONS
(2022)
Article
Optics
Baoku Wang, Ke Gai, Ruoxing Wang, Fei Yan, Li Li
Summary: This paper presents an interesting scheme of an ultra-broadband perfect terahertz (THz) absorber using a periodic-conductivity graphene metasurface. By modulating the conductivity of graphene in a periodic manner, the absorber can generate dense high-order resonance modes and achieve ultra-broadband continuous absorption. This scheme is significant for the development of broadband THz absorbers and has promising application prospects in THz stealth, imaging, and communication fields.
OPTICS AND LASER TECHNOLOGY
(2022)
Article
Engineering, Electrical & Electronic
Jacob Hall, Josep Miquel Jornet, Ngwe Thawdar, Tommaso Melodia, Francesco Restuccia
Summary: This article presents the first experimental study of modulation and bandwidth classification (MBC) at THz frequencies through deep learning techniques. The study proves the feasibility and effectiveness of MBC at THz frequencies and proposes a boosting technique to improve inference quality.
IEEE TRANSACTIONS ON TERAHERTZ SCIENCE AND TECHNOLOGY
(2023)
Article
Engineering, Electrical & Electronic
Priyangshu Sen, Jose V. V. Siles, Ngwe Thawdar, Josep M. M. Jornet
Summary: Sub-terahertz and terahertz-band communication technologies ranging from 100 GHz to 10 THz will be necessary for future wireless communication networks beyond 6G. While progress has been made in terahertz device technology for personal and local area networks, longer communication distances are needed to fully utilize the capacity of sub-terahertz and terahertz wireless links. In this study, we demonstrate a multi-kilometre and multi-gigabit-per-second link operating at 210-240 GHz using on-chip power-combining frequency multiplier designs and tailored software-defined ultrabroadband digital signal processing.
NATURE ELECTRONICS
(2023)
Article
Engineering, Aerospace
Ali J. Alqaraghuli, Jose V. Siles, Josep M. Jornet
Summary: This article explores terahertz and optical wireless communication technologies as the two projected high-data-rate cross-link communication technologies, and compares them in terms of device technology capabilities and wireless propagation properties. A performance analysis directly compares the two technologies for space communication in low Earth orbit constellations. More importantly, a roadmap is provided to push both ultrabroadband wireless technologies forward.
IEEE AEROSPACE AND ELECTRONIC SYSTEMS MAGAZINE
(2023)
Article
Engineering, Electrical & Electronic
Duschia Bodet, Priyangshu Sen, Zahed Hossain, Ngwe Thawdar, Josep M. Jornet
IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS
(2023)
Article
Multidisciplinary Sciences
Jubin Nathawat, Ishiaka Mansaray, Kohei Sakanashi, Naoto Wada, Michael D. Randle, Shenchu Yin, Keke He, Nargess Arabchigavkani, Ripudaman Dixit, Bilal Barut, Miao Zhao, Harihara Ramamoorthy, Ratchanok Somphonsane, Gil-Ho Kim, Kenji Watanabe, Takashi Taniguchi, Nobuyuki Aoki, Jong E. Han, Jonathan P. Bird
Summary: Stacking graphene with h-BN can change its bands, creating narrow minigaps and wider minibands. Hot carrier dynamics in these bands are crucial for functional (opto)electronic devices. In this study, we use rapid electrical pulsing to drive carriers into the strong electron-phonon coupling limit. By adjusting the chemical potential, we observe a cyclical evolution between metallic and semiconducting states. Our results show the importance of considering the dynamics of hot carriers and hot phonons in functional graphene superlattices.
NATURE COMMUNICATIONS
(2023)
Article
Multidisciplinary Sciences
Jong E. Han, Camille Aron, Xi Chen, Ishiaka Mansaray, Jae-Ho Han, Ki-Seok Kim, Michael Randle, Jonathan P. Bird
Summary: The significant difference between predicted and experimental switching fields in correlated insulators under a far-from-equilibrium DC electric field necessitates a reevaluation of current microscopic understanding. The authors introduce a generic model of electrons coupled to an inelastic phononic medium and show that an electron avalanche can occur in the bulk limit of such insulators at arbitrarily small electric field. The quantum avalanche is triggered by the generation of in-gap states through a multi-phonon emission process, leading to a premature and partial collapse of the correlated gap.
NATURE COMMUNICATIONS
(2023)
Article
Nanoscience & Nanotechnology
Josep Miquel Jornet, Amit Sangwan
Summary: The possibility to control matter at the atomic and molecular scale opens up the potential for new devices with unprecedented physical properties. For the wireless communications community, the development of miniature transceivers and antennas operating in uncharted frequency bands offers transformative applications across different scales, domains, and realms. This article presents the state of the art in electromagnetic nanoscale communication and networks, starting from the bottom-up approach. It discusses innovative applications, physical properties, and capabilities of nano-transceivers and nano-antennas, as well as propagation phenomena and tailored communication and networking solutions.
IEEE NANOTECHNOLOGY MAGAZINE
(2023)
Article
Telecommunications
Jorge Torres Gomez, Jennifer Simonjan, Josep Miquel Jornet, Falko Dressler
Summary: This letter focuses on investigating the intra-body communication channel between nanosensors and gateways attached to the skin using the terahertz spectrum. The study considers the impact of noise and mobility on communication performance and derives the trade-off between them.
IEEE COMMUNICATIONS LETTERS
(2023)
Article
Engineering, Electrical & Electronic
Viduneth Ariyarathna, Arjuna Madanayake, Josep M. M. Jornet
Summary: The development of wireless technologies in various fields such as mobile broadband communications, health care, and robotics necessitates faster and more reliable connections in both urban and rural areas. Over the past 30 years, wireless data rates have been doubling every 18 months. It is expected that terabits-per-second (Tbps) data rates will become a reality within the next five years and will be a major focus in designing 6G networks.
IEEE MICROWAVE MAGAZINE
(2023)
Article
Computer Science, Hardware & Architecture
Keerthi Priya Dasala, Josep Miquel Jornet, Edward W. Knightly
Summary: This paper presents a novel framework named UMBRA for supporting multi stream multi-user uplink transmissions via a single RF chain AP. It designs multi-user overlayed constellations and multi-user receiver mechanisms to enable concurrent time-triggered uplink multi-user transmissions received on a single RF chain AP. Experimental results show that UMBRA achieves more than 1.45x improvement in aggregate rate compared to single-user transmissions under different conditions.
IEEE-ACM TRANSACTIONS ON NETWORKING
(2023)
Article
Engineering, Electrical & Electronic
Michele Polese, Xavier Cantos-Roman, Arjun Singh, Michael J. Marcus, Thomas J. Maccarone, Tommaso Melodia, Josep M. Jornet
Summary: This paper discusses the potential for spectrum sharing among different stakeholders in the above 100 GHz spectrum, and the importance of avoiding harmful interference and disruption. It provides a tutorial on current regulations and highlights the need for sharing to maximize spectrum utilization. Through detailed simulations, it identifies scenarios where active users may introduce interference to passive sensing and reviews promising techniques for enabling active/passive sharing. The critical review and tutorial in this paper have the potential to drive future research and regulations that promote safe coexistence and benefit digital technologies and scientific exploration.
PROCEEDINGS OF THE IEEE
(2023)
Article
Chemistry, Physical
Kendon Shirley, Hsinhan Tsai, Nicholas Cucciniello, Jonathan Bird, Quanxi Jia, Elias Torres, Phil Butler, Anthony Butler, Jerome Crocco, Eslam Taha, Abdulsalam Alhawsawi, Jessica Germino, Maoz Dor, Chaochao Dun, Omer Firat, Jared Parker, Matt Graham, Kostya S. Novoselov, Wanyi Nie
Summary: We have developed a recyclable perovskite-graphene heterostructure for high-performance X-ray detection in medical imaging. The graphene pixel maintains high mobility even after perovskite deposition, enabling efficient conversion for ultrahigh sensitivity. By increasing the operational bias of the graphene channel, the signal-to-noise ratio of X-ray detection can be significantly improved. The perovskite layer can be easily washed off without damaging the graphene, making our heterostructure X-ray detector recyclable.
ACS ENERGY LETTERS
(2023)
Review
Multidisciplinary Sciences
Josep M. Jornet, Edward W. Knightly, Daniel M. Mittleman
Summary: This article discusses the challenges and potential applications of wireless platforms above 100 GHz. There is rapid advancement in the field of sub-terahertz wireless communications, with major research efforts worldwide. To overcome the hurdles associated with using these high frequencies, new capabilities for sensing and manipulating broadcasts are required. A vision for future wireless systems is emerging, addressing the forefront challenges and solutions beyond 5G.
NATURE COMMUNICATIONS
(2023)
Article
Engineering, Electrical & Electronic
Duschia M. Bodet, Josep M. Jornet
Summary: This work presents a brief survey of sub-THz and THz multiple antenna systems and suggests using more directional antenna elements to increase data rates. Both numerical and experimental analyses demonstrate the advantages of directional antenna elements.
IEEE OPEN JOURNAL OF THE COMMUNICATIONS SOCIETY
(2023)
Article
Computer Science, Hardware & Architecture
Xiaolin Gu, Wenjia Wu, Yusen Zhou, Aibo Song, Ming Yang, Zhen Ling, Junzhou Luo
Summary: This study proposes a radio frequency fingerprint identification solution based on crystal oscillator temperature adjustment, which enhances the differences between Wi-Fi device fingerprints and mitigates collision. Experimental results demonstrate the effectiveness of the system in identifying smartphones under different scenarios.
Article
Computer Science, Hardware & Architecture
Yutong Wu, Jianyue Zhu, Xiao Chen, Yu Zhang, Yao Shi, Yaqin Xie
Summary: This paper proposes a quality-of-service-based SIC order method and optimizes power allocation for maximizing the rate in the uplink NOMA system. The simulation results demonstrate the superiority of the proposed method compared to traditional orthogonal multiple access and exhaustive search.
Article
Computer Science, Hardware & Architecture
Songshi Dou, Li Qi, Zehua Guo
Summary: Emerging cloud services and applications have different QoS requirements for the network. SD-WANs play a crucial role in QoS provisioning by introducing network programmability, dynamic flow routing, and low data transmission latency. However, controller failures may degrade QoS. To address this, we propose PREDATOR, a QoS-aware network programmability recovery scheme that achieves fine-grained per-flow remapping without introducing extra delays, ensuring QoS robustness for high-priority flows.
Article
Computer Science, Hardware & Architecture
Ke Wang, Xiaojuan Ma, Heng Kang, Zheng Lyu, Baorui Feng, Wenliang Lin, Zhongliang Deng, Yun Zou
Summary: This paper proposes a method based on a parallel network simulation architecture to improve the simulation efficiency of satellite networks. By effectively partitioning the network topology and using algorithms such as resource assessment and load balancing, the simulation performance is enhanced. Experimental results demonstrate the effectiveness of this method.
Article
Computer Science, Hardware & Architecture
Sijin Yang, Lei Zhuang, Julong Lan, Jianhui Zhang, Bingkui Li
Summary: This paper proposes a reuse-based online scheduling mechanism that achieves deterministic transmission of dynamic flows through dynamic path planning and coordinated scheduling of time slots. Experimental results show that the proposed mechanism improves the scheduling success rate by 37.3% and reduces time costs by up to 66.6% compared to existing online scheduling algorithms.