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2018 Fifth International Conference on Millimeter-Wave and Terahertz Technologies (MMWaTT)最新文献

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Antenna coupled GaN-based pulsed THz emitter array, enhanced with nano-slit plasmonic waveguide modes 天线耦合氮化镓基脉冲太赫兹发射极阵列，纳米狭缝等离子波导模式增强
2018 Fifth International Conference on Millimeter-Wave and Terahertz Technologies (MMWaTT) Pub Date : 2018-12-01 DOI: 10.1109/MMWATT.2018.8661229
Pouya Torkaman, S. Darbari, M. J. Mohammad-Zamani, M. Heidari, Erfan Dejband
{"title":"Antenna coupled GaN-based pulsed THz emitter array, enhanced with nano-slit plasmonic waveguide modes","authors":"Pouya Torkaman, S. Darbari, M. J. Mohammad-Zamani, M. Heidari, Erfan Dejband","doi":"10.1109/MMWATT.2018.8661229","DOIUrl":"https://doi.org/10.1109/MMWATT.2018.8661229","url":null,"abstract":"An array of unbiased pulsed GaN-based terahertz emitters based on excitation of different waveguide modes in the metallic contact grating is proposed and simulated for the first time. The proposed emitter consists asymmetric metal semiconductor-metal, so dissimilar Schottky contacts induce internal electric field that accelerates the photogenerated carriers. Furthermore, by taking advantage of plasmonic cavity modes for specific dimensions of the emitter array, it is shown that THz photocurrent can be enhanced about 5 times in comparison with the unbiased emitter array of the same area. We demonstrate that, for appropriate dimensions of the top metal contact in such a THz emitter array, the first order guided modes of the sub-wavelength nano-slit waveguides will be formed between two adjusted metal contacts, which leading to an enhanced optical absorption and the consequent THz photocurrent in the active region. Finally, we have designed a THz antenna with maximum gain of 6.5, and bandwidth of 400 GHz, which is coupled to the proposed THz emitter array to improve the output radiation power.","PeriodicalId":338853,"journal":{"name":"2018 Fifth International Conference on Millimeter-Wave and Terahertz Technologies (MMWaTT)","volume":"114 6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127726714","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
MMWaTT 2018 Scientific Committee MMWaTT 2018科学委员会
2018 Fifth International Conference on Millimeter-Wave and Terahertz Technologies (MMWaTT) Pub Date : 2018-12-01 DOI: 10.1109/mmwatt.2018.8661248
{"title":"MMWaTT 2018 Scientific Committee","authors":"","doi":"10.1109/mmwatt.2018.8661248","DOIUrl":"https://doi.org/10.1109/mmwatt.2018.8661248","url":null,"abstract":"","PeriodicalId":338853,"journal":{"name":"2018 Fifth International Conference on Millimeter-Wave and Terahertz Technologies (MMWaTT)","volume":"349 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126681383","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Comparing Nonlinearity Effects of SMF and NZ-DSF fibers on the Performance of Optical Coherent Transmission Systems 比较SMF和NZ-DSF光纤的非线性对光相干传输系统性能的影响
2018 Fifth International Conference on Millimeter-Wave and Terahertz Technologies (MMWaTT) Pub Date : 2018-12-01 DOI: 10.1109/MMWATT.2018.8661227
M. Habibi, Ramin Hashemi, H. Beyranvand, Ali Emami, M. Hashemi, Davood Ranjbar Rafie
{"title":"Comparing Nonlinearity Effects of SMF and NZ-DSF fibers on the Performance of Optical Coherent Transmission Systems","authors":"M. Habibi, Ramin Hashemi, H. Beyranvand, Ali Emami, M. Hashemi, Davood Ranjbar Rafie","doi":"10.1109/MMWATT.2018.8661227","DOIUrl":"https://doi.org/10.1109/MMWATT.2018.8661227","url":null,"abstract":"In this paper, we compare the nonlinearity effects of single mode fiber (SMF) and non-zero dispersion shifted fiber (NZ-DSF) on the performance of optical coherent transmission systems. We estimate the nonlinearity effects of fiber, referred to as nonlinear interference noise (NLIN), by using the so-called enhanced Gaussian noise (EGN) model, and compute signal to noise ration (SNR) of optical coherent transmission system by considering NLIN and optical amplifier noise, referred to as amplified spontaneous emission (ASE) noise. By considering EGN model we optimize the lunch power of optical coherent systems considering SMF and NZ-DSF. Finally, a 100Gbps optical coherent transmission system is simulated and its results are compared with analytical results obtained based on the EGN model. The closeness between analytical and simulation results reveal the accuracy of the EGN model and the power optimization formulations.","PeriodicalId":338853,"journal":{"name":"2018 Fifth International Conference on Millimeter-Wave and Terahertz Technologies (MMWaTT)","volume":"285 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115529444","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Frugal Sampling Method for Analysis of Modulating Pulses in Nonlinear-loaded Transmission Lines at mm-wave Frequency 毫米波频率下非线性负载传输线调制脉冲分析的简化采样方法
2018 Fifth International Conference on Millimeter-Wave and Terahertz Technologies (MMWaTT) Pub Date : 2018-12-01 DOI: 10.1109/MMWATT.2018.8661239
Sedigheh Kouhpayeh‐Zadeh‐Esfahani, A. Abdipour, K. Afrooz
{"title":"Frugal Sampling Method for Analysis of Modulating Pulses in Nonlinear-loaded Transmission Lines at mm-wave Frequency","authors":"Sedigheh Kouhpayeh‐Zadeh‐Esfahani, A. Abdipour, K. Afrooz","doi":"10.1109/MMWATT.2018.8661239","DOIUrl":"https://doi.org/10.1109/MMWATT.2018.8661239","url":null,"abstract":"This paper presents a fast, efficient method for analyzing a transmission line, terminated by a nonlinear load and exited by modulating pulses, at mm-wave frequency. The utilized method is based on the time-domain frequency-separation (TDFS) method for nonlinear systems. The number of samples are reduced according to the width of the input modulating pulses and then the unconditionally stable algorithm-based on finite-difference time-domain (FDTD) method is utilized to analyze the distributed model of the transmission line according to each sample. An example of a transmission line analyzed with the proposed method is given. The good agreement between the results of the applied method and the conventional leapfrog method (and also simulation results using ADS software) confirms the accuracy of the presented method. The comparisons of the CPU time consumption between the two methods indicate 99.79% improvements.","PeriodicalId":338853,"journal":{"name":"2018 Fifth International Conference on Millimeter-Wave and Terahertz Technologies (MMWaTT)","volume":"91 6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131219590","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Application of Differential Global Surface Impedance (DGSI) Model in the Analysis of Plasmonic circuits 差分全局表面阻抗(DGSI)模型在等离子体电路分析中的应用
2018 Fifth International Conference on Millimeter-Wave and Terahertz Technologies (MMWaTT) Pub Date : 2018-12-01 DOI: 10.1109/MMWATT.2018.8661249
H. Ameri, R. Faraji-Dana
{"title":"Application of Differential Global Surface Impedance (DGSI) Model in the Analysis of Plasmonic circuits","authors":"H. Ameri, R. Faraji-Dana","doi":"10.1109/MMWATT.2018.8661249","DOIUrl":"https://doi.org/10.1109/MMWATT.2018.8661249","url":null,"abstract":"Efficient differential global surface impedance model has been applied to the analysis of plamonic circuits. This rigorous model relates the tangential electric field and equivalent surface electric current on the boundary of the object. This method not only enables one to use surface discretization instead of volumetric meshing, but also eliminates the need for equivalent surface magnetic current. This will result in a great reduction in computation time and memory resources. Plasmonic waveguide with different thicknesses have been analyzed and the results are compared with the results of a commercial software as well as global surface impedance (GSI) model introduced in the literature.","PeriodicalId":338853,"journal":{"name":"2018 Fifth International Conference on Millimeter-Wave and Terahertz Technologies (MMWaTT)","volume":"66 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116166967","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
On the Possibility of Improving the Average Chirality and Dissymmetry Factor Using Periodic Structures 利用周期结构提高平均手性和不对称系数的可能性
2018 Fifth International Conference on Millimeter-Wave and Terahertz Technologies (MMWaTT) Pub Date : 2018-12-01 DOI: 10.1109/MMWATT.2018.8661228
Somaye Kaviani Dezaki, A. Askarpour, A. Abdipour
{"title":"On the Possibility of Improving the Average Chirality and Dissymmetry Factor Using Periodic Structures","authors":"Somaye Kaviani Dezaki, A. Askarpour, A. Abdipour","doi":"10.1109/MMWATT.2018.8661228","DOIUrl":"https://doi.org/10.1109/MMWATT.2018.8661228","url":null,"abstract":"Chirality is an important property of molecules. Although its sensing is crucial in chemical processes, the sensitivity of the measurement is limited. By increasing the optical chirality (OC) or, more precisely, increasing the dissymmetry factor g of the impinging electromagnetic fields, this sensitivity can be enhanced. All the chirality enhancement techniques introduced so far, increase the OC locally. It is a question whether it is possible to design a structure to enhance the average OC on a certain cross section, such that, the average of the dissymmetry factor g is increased too. This paper analytically answers this question about periodic structures. Our analytical results reveal that this goal is inaccessible. The reported results are evaluated and confirmed by simulations. Finally, we show that increasing average of the dissymmetry factor g in the free-space is also impossible. In fact, we prove that a collection of plane waves propagating in the positive z-direction, cannot boost the average of the dissymmetry factor g in the xy plane.","PeriodicalId":338853,"journal":{"name":"2018 Fifth International Conference on Millimeter-Wave and Terahertz Technologies (MMWaTT)","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123969887","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
60 GHz MIMO Transceiver Design for Base Station of Radio over Fiber System 光纤无线通信系统基站60ghz MIMO收发器设计
2018 Fifth International Conference on Millimeter-Wave and Terahertz Technologies (MMWaTT) Pub Date : 2018-12-01 DOI: 10.1109/MMWATT.2018.8661247
Mojtaba Sohrabi, Jacqueline Damas, Muhammad Umar, Shahryar Sabouri, N. Neumann, K. Jamshidi, D. Plettemeier
{"title":"60 GHz MIMO Transceiver Design for Base Station of Radio over Fiber System","authors":"Mojtaba Sohrabi, Jacqueline Damas, Muhammad Umar, Shahryar Sabouri, N. Neumann, K. Jamshidi, D. Plettemeier","doi":"10.1109/MMWATT.2018.8661247","DOIUrl":"https://doi.org/10.1109/MMWATT.2018.8661247","url":null,"abstract":"A MIMO system for 60 GHz wireless communication based on Radio-over-Fiber (RoF) technique is designed and discussed. In this paper, a $2 times 2$ antenna array on 300 micron quartz (Silica) substrate with a bandwidth of 6 GHz for operating in V-band (50 GHz-75 GHz) is designed. The achieved gain is 9 dB. Moreover, a novel wideband planar bias tee (BT) circuit with a quarter-wave coupled-line is designed on the same substrate. It will provide proper biasing for millimeter wave photodiodes through the RF-choke and isolates the antenna from the bias. Simulation results show that the return loss is below 15 dB for the entire 45 GHz to 75 GHz band and it reaches to 45 dB at 60 GHz, while the insertion loss is lower than 0.5 dB. The overall performance of the complete antenna and BT circuit has been calculated by the 3D full-wave electromagnetic field simulator CST.","PeriodicalId":338853,"journal":{"name":"2018 Fifth International Conference on Millimeter-Wave and Terahertz Technologies (MMWaTT)","volume":"22 5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129583176","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Switchable Abnormal THz Wave Reflector Based on Molybdenum Disulfide (MoS2) 基于二硫化钼(MoS2)的开关异常太赫兹波反射器
2018 Fifth International Conference on Millimeter-Wave and Terahertz Technologies (MMWaTT) Pub Date : 2018-12-01 DOI: 10.1109/MMWATT.2018.8661233
Erfan Dejband, H. Karami, Manouchehr Hosseini, Pouya Torkaman
{"title":"Switchable Abnormal THz Wave Reflector Based on Molybdenum Disulfide (MoS2)","authors":"Erfan Dejband, H. Karami, Manouchehr Hosseini, Pouya Torkaman","doi":"10.1109/MMWATT.2018.8661233","DOIUrl":"https://doi.org/10.1109/MMWATT.2018.8661233","url":null,"abstract":"Recently Controlling the electromagnetic wave, especially in terahertz range is highly demanded due to the development of practical devices and application systems. In this paper, we propose a scheme to design tunable abnormal reflection structure consisting of molybdenum disulfide (MoS2) array on a grounded SiO2 and a gold layer beneath them to reflect the terahertz wave. In this structure, MoS2 can be controlled by intrinsic carrier density or voltage bias, to control the electromagnetic reflected beam at terahertz frequency. By adjusting the geometric dimensions of the MoS2 elements, the reflection phase can cover the range of 0–2π with linear phase shift, thus abrupt phase shifts can be introduced to design the reflected wavefront. Furthermore, the reflective phase gradient over the structure can be switched by controlling the intrinsic carrier density or voltage bias of the MoS2, hence reflected beam directions can be switched dynamically. The proposed scheme will bring much freedom in the design of beam manipulation devices and may be applied to terahertz radiation control. Numerical simulations verify the Snell’s law generalized at working frequency and far field scattering illustrate the abnormal reflection.","PeriodicalId":338853,"journal":{"name":"2018 Fifth International Conference on Millimeter-Wave and Terahertz Technologies (MMWaTT)","volume":"24 7","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132624801","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Exploiting the Ewald method for calculating the T-matrix of arbitrary periodic arrays 利用Ewald方法计算任意周期阵列的t矩阵
2018 Fifth International Conference on Millimeter-Wave and Terahertz Technologies (MMWaTT) Pub Date : 2018-12-01 DOI: 10.1109/MMWATT.2018.8661243
Mohammad Javad Armand, B. Rashidian
{"title":"Exploiting the Ewald method for calculating the T-matrix of arbitrary periodic arrays","authors":"Mohammad Javad Armand, B. Rashidian","doi":"10.1109/MMWATT.2018.8661243","DOIUrl":"https://doi.org/10.1109/MMWATT.2018.8661243","url":null,"abstract":"In this study a 3D robust, systematic, semi-analytical method to characterize electromagnetic scattering from periodic arrays of discrete scatterers is presented. The proposed method is based on the multiple-scattering T-matrix in connection with the Ewald method. The formulation is systematic, quite general, easily traceable, and fast. Its high speed of analysis makes it well suited to design optimizations. The formulation is well developed for obliquely incident plane waves, and can be extended to Gaussian beams by means of suitable plane wave decomposition. For validating the proposed method, an example of a scattering problem is solved, and the resulting scattering spectrum, and the total field are compared with those obtained using the method of moments. To the best of our knowledge no report on derivation of the T-matrix of a 3D (or even 2D) periodic array from the T-matrix of the isolated element, based on Ewald method has been reported before.","PeriodicalId":338853,"journal":{"name":"2018 Fifth International Conference on Millimeter-Wave and Terahertz Technologies (MMWaTT)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121477402","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Full wave Modeling and Analysis of Plasmonic HEMT performance 等离子体HEMT全波建模与性能分析
2018 Fifth International Conference on Millimeter-Wave and Terahertz Technologies (MMWaTT) Pub Date : 2018-12-01 DOI: 10.1109/MMWATT.2018.8661240
F. Daneshmandian, A. Abdipour, A. Askarpour
{"title":"Full wave Modeling and Analysis of Plasmonic HEMT performance","authors":"F. Daneshmandian, A. Abdipour, A. Askarpour","doi":"10.1109/MMWATT.2018.8661240","DOIUrl":"https://doi.org/10.1109/MMWATT.2018.8661240","url":null,"abstract":"The full wave analysis of 2-D plasmon propagation in a high electron mobility transistor (HEMT) channel is presented. The Maxwell’s equations and the hydrodynamic transport equations are solved simultaneously to model the structure, using the finite difference time domain (FDTD) numerical technique. By applying different bias voltages to the drain and the gate terminals, the properties of the 2-D plasmons along the channel are investigated. The analysis results show that the wavelength and the decay length of the propagation are significantly influenced by varying the bias voltages. So, it is possible to control the characteristics of the 2-D plasmon propagation along the channel and produce a reconfigurable structure for terahertz applications.","PeriodicalId":338853,"journal":{"name":"2018 Fifth International Conference on Millimeter-Wave and Terahertz Technologies (MMWaTT)","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122231633","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
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