IEEE Transactions on Terahertz Science and Technology最新文献_第3页

A Frequency-Tunable Terahertz Bandpass Filter for Future Communication Systems 用于未来通信系统的频率可调太赫兹带通滤波器

IF 3.9 2区工程技术

IEEE Transactions on Terahertz Science and Technology Pub Date : 2025-02-14 DOI: 10.1109/TTHZ.2025.3542289

Yanqing Chen;Feng Huang;Beiyuan Liang;Haobin Su;Xuewei Ju;Xiangfeng Wang

{"title":"A Frequency-Tunable Terahertz Bandpass Filter for Future Communication Systems","authors":"Yanqing Chen;Feng Huang;Beiyuan Liang;Haobin Su;Xuewei Ju;Xiangfeng Wang","doi":"10.1109/TTHZ.2025.3542289","DOIUrl":"https://doi.org/10.1109/TTHZ.2025.3542289","url":null,"abstract":"The importance of the terahertz (THz) region in wireless communication is increasing. THz tunable filters are key components for next-generation communication systems. In this article, we have designed a THz narrowband bandpass filter based on a double-layer frequency selective surface (FSS), which is composed of two X-shaped FSSs cascaded together with different geometric parameters. The center frequency of the double-layer structure is located between the center frequencies of the two single-layer FSSs. Based on the principle of inverse design, we employed intelligent algorithms to automatically optimize the structural parameters of the single-layer FSS. We simulated the transmission spectra of both single-layer and double-layer FSSs using finite-difference time-domain. Subsequently, FSSs were fabricated using femtosecond laser micromachining and characterized using time-domain THz spectroscopy. The experimental results are highly consistent with simulations. The designed double-layer filter exhibits a high Q factor and tunability of the center frequency by changing the spacing between the two FSS layers. Finally, based on an equivalent circuit model, we analyzed the transmission phenomenon of the nonequivalent double-layer FSS structure and attributed it to the resonances of equivalent capacitance and inductance between the FSS layers at different spacings. This approach can be applied to design tunable filters for other frequency bands.","PeriodicalId":13258,"journal":{"name":"IEEE Transactions on Terahertz Science and Technology","volume":"15 3","pages":"481-486"},"PeriodicalIF":3.9,"publicationDate":"2025-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143904528","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

100 Gbit/s and Beyond IEEE 802.15.3d Channelization Compatible THz Communications Enabled by a Broadband MUTC Photodiode 100gbit /s及以上的IEEE 802.15.3d信道化兼容太赫兹通信，由宽带MUTC光电二极管实现

IF 3.9 2区工程技术

IEEE Transactions on Terahertz Science and Technology Pub Date : 2025-02-13 DOI: 10.1109/TTHZ.2025.3541824

Ezgi Abacıoğlu;Abdu Subahan Mohammed;Jonas Tebart;Marcel Grzeslo;Tom Neerfeld;José Luis Fernández Estévez;Pascal Szriftgiser;Guillaume Ducournau;Andreas Stöhr

{"title":"100 Gbit/s and Beyond IEEE 802.15.3d Channelization Compatible THz Communications Enabled by a Broadband MUTC Photodiode","authors":"Ezgi Abacıoğlu;Abdu Subahan Mohammed;Jonas Tebart;Marcel Grzeslo;Tom Neerfeld;José Luis Fernández Estévez;Pascal Szriftgiser;Guillaume Ducournau;Andreas Stöhr","doi":"10.1109/TTHZ.2025.3541824","DOIUrl":"https://doi.org/10.1109/TTHZ.2025.3541824","url":null,"abstract":"We present photonics-driven high data rate IEEE 802.15.3d compliant terahertz (THz) communication links operated at a center frequency of 280 GHz. We analyze wireless data transmission within selected single and dual channels of the IEEE 802.15.3d and assess the outcomes through additional back-to-back (B2B) data transmission measurements and calibrated link budgets of the THz link. The system architecture uses on-wafer probing of a single high-power and highly linear broadband modified unitraveling-carrier photodiode (MUTC-PD). Using the MUTC-PD as THz transmitter, we report 16-QAM 100 Gbit/s 25-cm wireless links for single and dual channel data transmission with significantly low error vector magnitude (EVM) levels, that is, 12.3% and 10.9%, respectively. As for B2B demonstration, we successfully transmit 200 Gbit/s (32-QAM) in a single channel with 7.5% EVM and 160 Gbit/s (16-QAM) in dual channel with 7.8% EVM. We further display the highly linear nature of the MUTC-PD by efficient data transmission with higher modulation formats, which is also supported by the power-saturation characteristics of the PD. To the best of the authors´ knowledge, this is the first study investigating the IEEE 802.15.3d channelization compliancy through system level design and spectral verification while at the same time achieving 100 Gbit/s and beyond data rates with notably low EVM values.","PeriodicalId":13258,"journal":{"name":"IEEE Transactions on Terahertz Science and Technology","volume":"15 3","pages":"389-399"},"PeriodicalIF":3.9,"publicationDate":"2025-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10884861","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143904640","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Coherent Oscillation in a 2-D Resonant-Tunneling-Diode Terahertz Oscillator Array 二维共振隧道二极管太赫兹振荡器阵列的相干振荡

IF 3.9 2区工程技术

IEEE Transactions on Terahertz Science and Technology Pub Date : 2025-02-13 DOI: 10.1109/TTHZ.2025.3541837

Zhenling Tang;Zilang Zhao;Safumi Suzuki

{"title":"Coherent Oscillation in a 2-D Resonant-Tunneling-Diode Terahertz Oscillator Array","authors":"Zhenling Tang;Zilang Zhao;Safumi Suzuki","doi":"10.1109/TTHZ.2025.3541837","DOIUrl":"https://doi.org/10.1109/TTHZ.2025.3541837","url":null,"abstract":"To generate high-power, high-directivity terahertz (THz) radiation, in this article, we propose and fabricate a 2-D resonant-tunneling-diode (RTD) THz oscillator array. The array is formed by vertically intersected twisted slot antennas, where enhanced combined radiation is achieved through the antiphase coupling between adjacent RTDs. Additionally, the electrode shapes are tailored to mitigate the electric field cancelation, further increasing the output power. Experimental results confirm coherent oscillation in the fabricated 2×2 array, with frequencies reaching up to 513 GHz and output power exceeding 0.4 mW at lower frequencies. Simulation results suggest that scaling up the 2-D array maintains the strong coherent coupling, despite a nonuniform amplitude distribution among the RTDs. This amplitude nonuniformity can be effectively addressed by introducing metal–insulator–metal capacitors. Furthermore, simulations also predict improved directivity with increased array scale, resulting in a low-diffusion, quasi-plane wavefront. The proposed structure holds the potential for advancing the broad application prospects of THz waves.","PeriodicalId":13258,"journal":{"name":"IEEE Transactions on Terahertz Science and Technology","volume":"15 3","pages":"431-439"},"PeriodicalIF":3.9,"publicationDate":"2025-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143904629","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A Low-Loss Sub-THz Radial Power Divider Based on Circularly Polarized TE11 Mode 基于圆极化TE11模式的低损耗亚太赫兹径向功率分压器

IF 3.9 2区工程技术

IEEE Transactions on Terahertz Science and Technology Pub Date : 2025-02-13 DOI: 10.1109/TTHZ.2025.3541840

Zhang Dang;Yong Zhang;Hua-Li Zhu;Bo Zhang;Bo Yan;Rui-Min Xu

引用次数: 0

Building a Comprehensive Complex Permittivity Library for THz Radio Planning Using Quasi-Optical Measurements 利用准光学测量建立太赫兹无线电规划综合复介电常数库

IF 3.9 2区工程技术

IEEE Transactions on Terahertz Science and Technology Pub Date : 2025-02-13 DOI: 10.1109/TTHZ.2025.3541838

Dou Feng;Alperen Sari;Christopher Sumner;Morgan Dryhurst;Matthew Brown;Vanshika Gupta;Jie Qing;Olcay Altıntaş;Alex Bystrov;Costas Constantinou;Stephen M. Hanham;Miguel Navarro-Cía

引用次数: 0

Dispersive Mirror-Based Phase Control in THz Homodyne Systems 基于色散镜的太赫兹纯差系统相位控制

IF 3.9 2区工程技术

IEEE Transactions on Terahertz Science and Technology Pub Date : 2025-02-06 DOI: 10.1109/TTHZ.2025.3539451

Lisa C. Kreuzer;Nils Surkamp;Niklas Schulz;Valentin J. Wittwer;Martin Hoffmann;Clara J. Saraceno;Thomas Südmeyer;Carsten Brenner;Milan Deumer;Robert B. Kohlhaas;Martin R. Hofmann

{"title":"Dispersive Mirror-Based Phase Control in THz Homodyne Systems","authors":"Lisa C. Kreuzer;Nils Surkamp;Niklas Schulz;Valentin J. Wittwer;Martin Hoffmann;Clara J. Saraceno;Thomas Südmeyer;Carsten Brenner;Milan Deumer;Robert B. Kohlhaas;Martin R. Hofmann","doi":"10.1109/TTHZ.2025.3539451","DOIUrl":"https://doi.org/10.1109/TTHZ.2025.3539451","url":null,"abstract":"In this article, we present an alternative sampling approach for continuous-wave terahertz homodyne systems that overcomes limitations regarding the measurement of dispersive samples of currently used techniques. The wavelength-dependent phase-delay mirrors, which were developed for this work, induce a frequency-dependent phase shift of up to <inline-formula><tex-math>$frac{pi }{2}$</tex-math></inline-formula>. This technique allows sampling of the THz-field, by tuning the laser sources in such a way that a constant frequency difference is maintained and the center frequency is shifted. In our configuration, the phase shift between transmitter and receiver arms depends only on the center frequency of the lasers. This allows for replacing the movement of a delay stage with variation of the center frequency to capture a THz trace. Consequently, measurements are not constrained by the speed of the delay line anymore. Furthermore, this phase shift is unaffected by differences in path length within the setup and does not require phase modulators. Prior simulations show that these mirrors achieve a phase shift up to <inline-formula><tex-math>$pi$</tex-math></inline-formula> in the C-band for a difference frequency of 280 GHz, which could be confirmed by our measurements. We successfully demonstrated the first application by measuring sample thickness.","PeriodicalId":13258,"journal":{"name":"IEEE Transactions on Terahertz Science and Technology","volume":"15 3","pages":"526-530"},"PeriodicalIF":3.9,"publicationDate":"2025-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10876761","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143904615","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Non-Line-of-Sight 300 GHz Band Wireless Link Enabled by a Frequency Dependent Reflective Surface 由频率相关反射表面实现的非视距300 GHz波段无线链路

IF 3.9 2区工程技术

IEEE Transactions on Terahertz Science and Technology Pub Date : 2025-02-06 DOI: 10.1109/TTHZ.2025.3539501

Frédéric Dutin;Unai Beaskoetxea Gartzia;Victor Torres;Pascal Szriftgiser;Jorge Teniente;Guillaume Ducournau

{"title":"Non-Line-of-Sight 300 GHz Band Wireless Link Enabled by a Frequency Dependent Reflective Surface","authors":"Frédéric Dutin;Unai Beaskoetxea Gartzia;Victor Torres;Pascal Szriftgiser;Jorge Teniente;Guillaume Ducournau","doi":"10.1109/TTHZ.2025.3539501","DOIUrl":"https://doi.org/10.1109/TTHZ.2025.3539501","url":null,"abstract":"Reconfigurable intelligent surface is a promising technology for the up-coming sixth-generation (6G) of cellular communication networks. In this context, an experimental study of specular and nonspecular reflections of a reflective surface (RS) by scattering parameter measurements in the 300 GHz range is presented. Here, we compare the insertion loss of a fixed and passive RS at its optimal output deflection angle with respect to the specular reflection on a metallic plate. We propose a methodology to assess the losses induced by the surface and validate the use of the device within a THz link. At its best, around 290 GHz, the surface insertion loss is less than 3 dB compared to the metallic plate. We then investigate a non-line-of-sight (LoS) THz link operating in QSPK and QAM-16 coherent transmission using the RS. Data rates up to 10 Gbits/s for QSPK and 20 Gbits/s for QAM-16 are obtained. This is, to the best authors knowledge, the first demonstration of a NLoS THz data-link including such RS.","PeriodicalId":13258,"journal":{"name":"IEEE Transactions on Terahertz Science and Technology","volume":"15 3","pages":"400-411"},"PeriodicalIF":3.9,"publicationDate":"2025-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10876801","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143904527","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A Terahertz Wide-Angle Beam-Steering 3D-Printed Dual-Polarized GRIN Lens With Planar Focal Surface 一种太赫兹广角光束导向平面焦面的3d打印双偏振GRIN透镜

IF 3.9 2区工程技术

IEEE Transactions on Terahertz Science and Technology Pub Date : 2025-02-06 DOI: 10.1109/TTHZ.2025.3539503

Yue Guo;Fanyi Meng;Kaixue Ma;Jianli Ma;Yu Luo

{"title":"A Terahertz Wide-Angle Beam-Steering 3D-Printed Dual-Polarized GRIN Lens With Planar Focal Surface","authors":"Yue Guo;Fanyi Meng;Kaixue Ma;Jianli Ma;Yu Luo","doi":"10.1109/TTHZ.2025.3539503","DOIUrl":"https://doi.org/10.1109/TTHZ.2025.3539503","url":null,"abstract":"A terahertz gradient-index (GRIN) dual-polarized lens with wide-angle beam-steering is designed in this article. A novel GRIN distribution is designed by superimposing the refractive index of the Luneburg lens and the Gutman lens to expand the beam-steering angle. The effects of the superposition ratio of Luneburg lens and Gutman lens <inline-formula><tex-math>${bm{ }}$</tex-math></inline-formula> on the scanning performance of GRIN lens are studied. The novel GRIN distribution is provided for two different purposes. The lens has good scanning performance with a planar feed, and dual polarization can be achieved. High-precision 3-D printing technology is utilized to fabricate the proposed lens to verify the proposed GRIN distribution. A GRIN lens with an aperture size of 8 mm × 8 mm and a thickness of 6.4 mm was manufactured. The proposed lens is measured to validate the implementation method at 220 GHz. The results show that the proposed GRIN lens has a wide beam scanning angle of ±39° and ±38° in vertical polarization and horizontal polarization, respectively. The lens has a peak gain of 19.2 dBi. The scanning losses of the lens are 0.5 dB for vertical polarization and 0.7 for horizontal polarization, respectively.","PeriodicalId":13258,"journal":{"name":"IEEE Transactions on Terahertz Science and Technology","volume":"15 3","pages":"519-525"},"PeriodicalIF":3.9,"publicationDate":"2025-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143904626","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A Novel FDTD-PIC Scheme for Accurate Transient Analysis of Terahertz Gyrotrons 一种用于太赫兹回旋管瞬态精确分析的FDTD-PIC新方案

IF 3.9 2区工程技术

IEEE Transactions on Terahertz Science and Technology Pub Date : 2025-02-06 DOI: 10.1109/TTHZ.2025.3539444

Runfeng Tang;Xianfei Chen;Liangqian Xie;Weijian Liu;Chenxi He;Xiaotao Han;Andrei V. Savilov;Mikhail Yu Glyavin;Houxiu Xiao

{"title":"A Novel FDTD-PIC Scheme for Accurate Transient Analysis of Terahertz Gyrotrons","authors":"Runfeng Tang;Xianfei Chen;Liangqian Xie;Weijian Liu;Chenxi He;Xiaotao Han;Andrei V. Savilov;Mikhail Yu Glyavin;Houxiu Xiao","doi":"10.1109/TTHZ.2025.3539444","DOIUrl":"https://doi.org/10.1109/TTHZ.2025.3539444","url":null,"abstract":"As the resonant frequencies advance into the terahertz regime, the mode competition in the gyrotron becomes increasingly intense, exhibiting atypical and varied transient processes. Consequently, rigorous time-domain simulation is crucial for developing terahertz gyrotrons. Traditional dedicated codes typically utilize the gyroaveraged method to address fast time-scale behaviors. However, this approach may lead to misinterpretation when analyzing transient processes involving modes with different response properties and multiscale behaviors, such as harmonic and gyro-backward-wave oscillator (BWO) operations. To address this challenge, this article directly analyzes the dynamic behavior of various modes based on fast-varying field variables without any time-scale assumption, ensuring a precise depiction of beam-wave interactions. The proposed numerical framework integrates a scalar 1-D finite difference time domain (FDTD) method with a 3-D particle-in-cell algorithm, providing a comprehensive description of full-wave physics. The simplified 1-D FDTD model, along with the preselection of relevant modes, significantly reduces data storage requirements. A thorough validation of the proposed numerical framework demonstrates that the results align well with those obtained from established dedicated codes, showcasing superior accuracy in transient analysis.","PeriodicalId":13258,"journal":{"name":"IEEE Transactions on Terahertz Science and Technology","volume":"15 3","pages":"496-504"},"PeriodicalIF":3.9,"publicationDate":"2025-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143908392","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Integrated Broadband THz Switching Using Photoconductivity Modulation in Si-on-Sapphire Substrates 基于硅-蓝宝石衬底光导调制的集成宽带太赫兹开关

IF 3.9 2区工程技术

IEEE Transactions on Terahertz Science and Technology Pub Date : 2025-02-03 DOI: 10.1109/TTHZ.2025.3537460

Peizhao Li;Weifeng Wu;Yu Shi;Yijing Deng;Kavan Dave;Patrick Fay;Lei Liu

{"title":"Integrated Broadband THz Switching Using Photoconductivity Modulation in Si-on-Sapphire Substrates","authors":"Peizhao Li;Weifeng Wu;Yu Shi;Yijing Deng;Kavan Dave;Patrick Fay;Lei Liu","doi":"10.1109/TTHZ.2025.3537460","DOIUrl":"https://doi.org/10.1109/TTHZ.2025.3537460","url":null,"abstract":"We report the first experimental demonstration of an alternative approach for achieving integrated broadband terahertz (THz) switching functionality, based on photoconductivity modulation in thin film Si on low-loss sapphire substrates. By employing a silicon thin film mesa (14 × 14 μm2) on a silicon-on-sapphire (SoS) substrate (with 1.5-<italic>μm-thick silicon and 600-<italic>μm-thick sapphire), an optically-controlled THz switch integrated with low-loss coplanar waveguide transmission lines operating from 110 to 220 GHz has been designed, fabricated, and characterized. To control the switch in this prototype demonstration, a 915 nm laser diode was used to illuminate the silicon mesa through an optical fiber. The switch performance was measured on-wafer in both <italic>D- and <italic>G-band; an average <sc>on-state insertion loss of ∼3.5 dB (with minimum insertion loss of 2.5 and 1.8 dB at 160 and 200 GHz), and an off-state isolation greater than 20 dB across the entire frequency range have been achieved. This performance can be further greatly improved, and is comparable to or better than competing approaches, with the advantage that this approach allows seamless integration of the switch with passive components on low-loss sapphire substrates. This makes the reported approach promising for developing high-performance and compact THz switches for next-generation adaptive circuits and systems.","PeriodicalId":13258,"journal":{"name":"IEEE Transactions on Terahertz Science and Technology","volume":"15 3","pages":"536-540"},"PeriodicalIF":3.9,"publicationDate":"2025-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143904612","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0