IEEE Transactions on Terahertz Science and Technology最新文献_第2页

Cost-Effective Photonic Terahertz Signal Generation Using a Single Wavelength Tunable Laser for Communication and Radar Applications 成本效益光子太赫兹信号产生使用单一波长可调谐激光器用于通信和雷达应用

IF 3.6 2区工程技术

IEEE Transactions on Terahertz Science and Technology Pub Date : 2026-10-01 Epub Date: 2026-04-15 DOI: 10.1109/TTHZ.2026.3684329

Shenghong Ye;Yiqing Wang;Ryota Kaide;Bo Li;Ming Che;Yuya Mikami;Yuta Ueda;Kazutoshi Kato

{"title":"Cost-Effective Photonic Terahertz Signal Generation Using a Single Wavelength Tunable Laser for Communication and Radar Applications","authors":"Shenghong Ye;Yiqing Wang;Ryota Kaide;Bo Li;Ming Che;Yuya Mikami;Yuta Ueda;Kazutoshi Kato","doi":"10.1109/TTHZ.2026.3684329","DOIUrl":"https://doi.org/10.1109/TTHZ.2026.3684329","url":null,"abstract":"Photonics-based terahertz (THz) technology has emerged as a key enabler for future 6G networks, offering ultrawide bandwidth and cross-domain applications such as high-capacity communications and high-resolution radar. However, conventional THz photomixing architectures rely on optical frequency combs or dual lasers, which impose severe limitations in terms of size, weight, power, and cost (SWAP-C). In this article, we propose a cost-effective photonic THz signal generation scheme based on only a single electro-optically wavelength tunable laser (WTL). Moreover, two representative applications are investigated. For THz wireless communications, the proposed system employs a fiber-delayed self-multiplexer to realize on-off keying modulation via wavelength switching, together with a T-flip-flop-based decoding method that enhances data rate scalability and transmission security. An error-free 100 Mbit/s transmission at 280 GHz validates the feasibility of this low-SWAP-C communication system. For radar applications, the same single-WTL platform enables linearly frequency-modulated (LFM) THz signal generation with waveform reconfigurability. Both sawtooth and triangle LFM THz signals are achieved, providing enhanced bandwidths of 11.5 GHz and 5 GHz with chirp rates exceeding 0.027 GHz/ns at the 300-GHz-band. These results highlight the versatility of single-WTL-based photomixing, presenting a low-SWAP-C solution for future photonic THz communication and radar systems.","PeriodicalId":13258,"journal":{"name":"IEEE Transactions on Terahertz Science and Technology","volume":"16 10","pages":"1056-1066"},"PeriodicalIF":3.6,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149188682","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}

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High THz Average Power Generation From Photoconductive Connected Array Antenna Excited by High-Power Laser 高功率激光激发光导连接阵列天线产生高太赫兹平均功率

IF 3.6 2区工程技术

IEEE Transactions on Terahertz Science and Technology Pub Date : 2026-10-01 Epub Date: 2026-03-03 DOI: 10.1109/TTHZ.2026.3669435

Martijn D. Huiskes;Mohsen Khalili;Juan Bueno;Nuria Llombart;Paolo M. Sberna;Clara J. Saraceno;Andrea Neto

引用次数: 0

Terahertz-Wave Homodyne Detection With IQ Demodulation Based on Circular Polarization 基于圆偏振的IQ解调太赫兹波纯差检测

IF 3.6 2区工程技术

IEEE Transactions on Terahertz Science and Technology Pub Date : 2026-10-01 Epub Date: 2026-03-04 DOI: 10.1109/TTHZ.2026.3690235

Shunto Onmura;Adrian Dobroiu;Safumi Suzuki

{"title":"Terahertz-Wave Homodyne Detection With IQ Demodulation Based on Circular Polarization","authors":"Shunto Onmura;Adrian Dobroiu;Safumi Suzuki","doi":"10.1109/TTHZ.2026.3690235","DOIUrl":"https://doi.org/10.1109/TTHZ.2026.3690235","url":null,"abstract":"We propose a homodyne detection method in the terahertz (THz)-wave range to significantly improve the signal-to-noise ratio in imaging and other applications. The THz wave is generated by a resonant-tunneling diode (RTD) oscillator array. We split this wave into RF and local oscillator (LO) beams, and allow the RF beam to propagate to the target. When it returns, it mixes with the LO beam in the detector, achieving homodyne detection. However, since this is equivalent to an interferometric setup, the detected signal strongly depends on the distance to the target. To remove this dependence, we implement an IQ demodulation technique by using a second detector that provides a quadrature signal with respect to the first. This allows measuring both the intensity of the wave returning from the target and the propagation distance, modulo the wavelength. To obtain the pair of quadrature signals, the RF beam is circularly polarized using a quarter-wave plate. We present the preliminary results of this homodyne detection technique, including SNR measurements to demonstrate its noise-reduction effectiveness and an imaging illustration.","PeriodicalId":13258,"journal":{"name":"IEEE Transactions on Terahertz Science and Technology","volume":"16 10","pages":"1089-1095"},"PeriodicalIF":3.6,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149188366","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

Optimized Calibration of Terahertz Polarimetric Imaging Systems Using Imperfect Polarizers for Accurate Jones-Matrix Mapping 使用不完美偏振器的太赫兹偏振成像系统精确琼斯矩阵映射的优化校准

IF 3.6 2区工程技术

IEEE Transactions on Terahertz Science and Technology Pub Date : 2026-10-01 Epub Date: 2026-07-10 DOI: 10.1109/TTHZ.2026.3711763

Arash Karimi;Zachery B. Harris;M. Hassan Arbab

{"title":"Optimized Calibration of Terahertz Polarimetric Imaging Systems Using Imperfect Polarizers for Accurate Jones-Matrix Mapping","authors":"Arash Karimi;Zachery B. Harris;M. Hassan Arbab","doi":"10.1109/TTHZ.2026.3711763","DOIUrl":"https://doi.org/10.1109/TTHZ.2026.3711763","url":null,"abstract":"Accurate terahertz (THz) polarimetric imaging requires robust system calibration to recover the Jones matrix of a sample. In this article, we develop a generalized <italic>in situ</i> calibration framework for any THz polarimetry system using a rotating wire-grid polarizer (WGP) placed in front of a mirror. The calibrating WGP is modeled as a lossless but leaky element having a frequency-dependent extinction coefficient and phase retardance. We demonstrate the new method using the polarimetric version of the THz PHASR Scanner as a testbed. We derive two equivalent calibration formulations, one of which is based on an orthogonal harmonic-basis formulation that enables a Fourier series interpretation and motivates rotation angles that are uniformly spaced modulo <inline-formula><tex-math>$pi$</tex-math></inline-formula>. The condition numbers of the two alternative matrices are minimized to optimize the performance of the system with respect to the choice of polarizer rotation angles. Using this approach, calibration can be performed with a minimal set of three optimized angles, yielding a relative error of less than 10% compared to a reference calibration with a full set of 18 angles. We validated the framework using a rotating x-cut lithium niobate crystal, showing that accounting for WGP leakage removes systematic errors and yields reflection coefficients consistent with the theoretical values. Finally, we demonstrate accurate polarimetric imaging of two stacked birefringent crystals with unknown principal axes, by mapping Jones matrices via eigendecomposition in agreement with theory. This approach enables faster, more reliable THz polarimetric imaging in field-deployable scenarios and improves calibration accuracy of bench-top systems for material characterization.","PeriodicalId":13258,"journal":{"name":"IEEE Transactions on Terahertz Science and Technology","volume":"16 10","pages":"1124-1137"},"PeriodicalIF":3.6,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=11603884","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149188509","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}

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Circularly Polarized Azimuthally Omnidirectional Terahertz Fan-Beam Tracking With Electronic Polarization Synthesis 基于电子偏振合成的圆偏振方位全向太赫兹扇形波束跟踪

IF 3.6 2区工程技术

IEEE Transactions on Terahertz Science and Technology Pub Date : 2026-10-01 Epub Date: 2026-03-19 DOI: 10.1109/TTHZ.2026.3694964

Ryoma Sonoyama;Masahiko Inami;Yasuaki Monnai

引用次数: 0

Expend Your Network, Get Rewarded 拓展人脉，获得回报

IF 3.6 2区工程技术

IEEE Transactions on Terahertz Science and Technology Pub Date : 2026-10-01 Epub Date: 2026-10-16 DOI: 10.1109/TTHZ.2026.3743393

引用次数: 0

Editorial: 3rd Special Issue on Selected Emerging Trends in Terahertz Science and Technology 社论：第3期《太赫兹科技新趋势》特刊

IF 3.6 2区工程技术

IEEE Transactions on Terahertz Science and Technology Pub Date : 2026-10-01 Epub Date: 2026-10-16 DOI: 10.1109/TTHZ.2026.3733300

Zachary Taylor;Dave Cooke;Nuria Llombart

引用次数: 0

Control and Validation of Terahertz Near-Fields for Atomic-Scale Time-Domain Spectroscopy 太赫兹原子尺度时域光谱近场控制与验证

IF 3.6 2区工程技术

IEEE Transactions on Terahertz Science and Technology Pub Date : 2026-10-01 Epub Date: 2026-07-01 DOI: 10.1109/TTHZ.2026.3709211

Stefanie Adams;Vedran Jelic;Mohamed A. Hassan;Kaedon Cleland-Host;Eve Ammerman;Tyler L. Cocker

{"title":"Control and Validation of Terahertz Near-Fields for Atomic-Scale Time-Domain Spectroscopy","authors":"Stefanie Adams;Vedran Jelic;Mohamed A. Hassan;Kaedon Cleland-Host;Eve Ammerman;Tyler L. Cocker","doi":"10.1109/TTHZ.2026.3709211","DOIUrl":"https://doi.org/10.1109/TTHZ.2026.3709211","url":null,"abstract":"Terahertz time-domain spectroscopy (THz-TDS) is a powerful tool for materials science. It can be used to extract the complex optical properties of a material by measuring the electric field of a terahertz probe pulse in the time domain after interaction with a sample. The spatial resolution of THz-TDS has recently advanced to the atomic scale through the introduction of a method in which the time trace of the local electric field is read out directly via the tunneling current in a terahertz scanning tunneling microscope junction. This detection mechanism fundamentally differs from those employed in more conventional approaches, which collect and measure scattered light. Consequently, the parameter space and data analysis for this new method deviates from that of free-space measurements. Here, we demonstrate the optimization of atomic-scale THz-TDS measurement parameters by using data-informed quantitative and qualitative validation techniques to ensure accurate sampling of the terahertz electric near-field. By combining experiments on Au(111) with data-driven simulations, we show the influence of various parameters on the waveform sampling technique and present a comprehensive description of the terahertz-field-induced tunneling mechanism in a scanning tunneling microscope tip–sample junction.","PeriodicalId":13258,"journal":{"name":"IEEE Transactions on Terahertz Science and Technology","volume":"16 10","pages":"1075-1088"},"PeriodicalIF":3.6,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=11592782","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149188684","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

IEEE Microwave Theory and Technology Society Information 微波理论与技术学会会刊

IF 3.6 2区工程技术

IEEE Transactions on Terahertz Science and Technology Pub Date : 2026-07-01 Epub Date: 2026-06-23 DOI: 10.1109/TTHZ.2026.3700339

引用次数: 0

The Evolving Role of Parasitic Parameters of Matched Loads in Directivity Design of Terahertz Ultra-Wideband Couplers 匹配负载寄生参数在太赫兹超宽带耦合器方向性设计中的演化作用

IF 3.6 2区工程技术

IEEE Transactions on Terahertz Science and Technology Pub Date : 2026-07-01 Epub Date: 2026-03-08 DOI: 10.1109/TTHZ.2026.3691538

Zefeng Li;Bo Zhang

{"title":"The Evolving Role of Parasitic Parameters of Matched Loads in Directivity Design of Terahertz Ultra-Wideband Couplers","authors":"Zefeng Li;Bo Zhang","doi":"10.1109/TTHZ.2026.3691538","DOIUrl":"https://doi.org/10.1109/TTHZ.2026.3691538","url":null,"abstract":"Directivity is a key performance metric for couplers. Existing research has confirmed that the parasitic parameters of a matched load influence coupler directivity, and that their constructive utilization can further enhance it. However, a critical question arises: Is this method universally applicable? Is it applicable to the terahertz frequency band? To address these questions, this article conducts an in-depth investigation into the relationship between these parasitic parameters and coupler directivity, based on the design of a 50–250 GHz microstrip coupler integrated with a matched load. The method is pushed to an extreme scenario by extending the operating frequency into the terahertz band and expanding the bandwidth to 200 GHz. Under these conditions, a fundamental role reversal of the parasitic parameters is observed: they become the primary cause of directivity degradation. Subsequent attempts to further exploit these parameters for directivity enhancement help clarify the method's inherent limitations and define its applicable boundaries. In addition, the designed 50–250 GHz coupler with over 18 dB directivity and the 50–250 GHz thin-film resistor matched load with a return loss greater than 29 dB both exhibit excellent performance and can serve as valuable references for related research.","PeriodicalId":13258,"journal":{"name":"IEEE Transactions on Terahertz Science and Technology","volume":"16 7","pages":"829-835"},"PeriodicalIF":3.6,"publicationDate":"2026-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148442495","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