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Journal articles on the topic 'Teraherz Waveguides'

Author: Grafiati

Published: 4 June 2021

Last updated: 3 February 2022

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1

Ermolov, Vladimir, Antti Lamminen, Jaakko Saarilahti, Ben Wälchli, Mikko Kantanen, and Pekka Pursula. "Micromachining integration platform for sub-terahertz and terahertz systems." International Journal of Microwave and Wireless Technologies 10, no. 5-6 (2018): 651–59. http://dx.doi.org/10.1017/s175907871800048x.

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AbstractWe demonstrate a sub-terahertz (THz) and THz integration platform based on micromachined waveguides on silicon. The demonstrated components in the frequency range 225–325 GHz include waveguides, filters, waveguide vias, and low-loss transitions between the waveguide and the monolithic integrated circuits. The developed process relies on microelectromechanical systems manufacturing methods and silicon wafer substrates, promising a scalable and cost-efficient system integration method for future sub-THz and THz communication and sensing applications. Low-temperature Au/In thermo-compress

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2

Bhardwaj, Rakesh Kumar, H. S. Sudhamani, V. P. Dutta, and Naresh Bhatnagar. "Micromachining and Characterisation of Folded Waveguide Structure at 0.22THz." Journal of Infrared, Millimeter, and Terahertz Waves 42, no. 3 (2021): 229–38. http://dx.doi.org/10.1007/s10762-021-00767-w.

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AbstractThe demand of high-speed wireless communication has increased, which need the data rate to be in the order of Terabyte per second (Tbps) in the near future. Terahertz (THz) band communication is a key wireless communication technology to satisfy this future demand. This would also reduce the spectrum scarcity and capacity limitation of current wireless systems. Microfabricated Folded Waveguide TWTs are the potential compact sources of wide band and high-power terahertz radiation. This study primarily focuses on machining technology for THz waveguide components requiring ultra-high prec

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3

Uranus, Henri P., and B. M. A. Rahman. "Low-loss ARROW waveguide with rectangular hollow core and rectangular low-density polyethylene/air reflectors for terahertz waves." Journal of Nonlinear Optical Physics & Materials 27, no. 03 (2018): 1850029. http://dx.doi.org/10.1142/s0218863518500297.

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Designing low-loss waveguides for terahertz waves is challenging as most materials are very lossy in this frequency band. Most scientists simply consider transmitting the waves through low-loss air, which however also has its own difficulties as index-guiding is not possible. In this paper, we report on the design of low-loss waveguides for terahertz waves and associated results by using a finite element leaky mode solver. These results show that waveguides designed using ARROW (anti-resonant reflecting optical waveguide) approach yield a low combined absorption and leakage loss down to only 0

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4

Xu, Lan-Lan, Ya-Xian Fan, Huan Liu, Tao Zhang, and Zhi-Yong Tao. "Terahertz Displacement Sensing Based on Interface States of Hetero-Structures." Electronics 9, no. 8 (2020): 1213. http://dx.doi.org/10.3390/electronics9081213.

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Herein, we propose a nano displacement sensor based on the interface state of a terahertz hetero-structure waveguide. The waveguide consists of two periodically corrugated metallic tubes with different duty ratios, which can result in similar forbidden bands in their frequency spectra. It was found that the topological properties of these forbidden bands are different, and the hetero-structure can be formed by connecting these two waveguides. In the hetero-structure waveguide, the interface state of an extraordinary transmission can always arise within the former forbidden bands, the peak freq

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5

Teng, Da, and Kai Wang. "Theoretical Analysis of Terahertz Dielectric–Loaded Graphene Waveguide." Nanomaterials 11, no. 1 (2021): 210. http://dx.doi.org/10.3390/nano11010210.

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The waveguiding of terahertz surface plasmons by a GaAs strip-loaded graphene waveguide is investigated based on the effective-index method and the finite element method. Modal properties of the effective mode index, modal loss, and cut-off characteristics of higher order modes are investigated. By modulating the Fermi level, the modal properties of the fundamental mode could be adjusted. The accuracy of the effective-index method is verified by a comparison between the analytical results and numerical simulations. Besides the modal properties, the crosstalk between the adjacent waveguides, wh

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6

Biryukov, Vladimir, Vladimir Grachev, Ekaterina Karakozova, Sergey Lobin, and Vladimir Shcherbakov. "Estimation of losses per unit length in a rectangular waveguide with rough screening surfaces based on the concept of partial waves." ITM Web of Conferences 30 (2019): 07001. http://dx.doi.org/10.1051/itmconf/20193007001.

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A method for calculating the rough surface reflection coefficient of an electromagnetic wave is proposed. It is shown that the screening surface roughness in waveguides is equivalent to a decrease in conductivity of these surfaces in comparison with values belonging to Schukin-Leontovich boundary conditions for completely smooth surfaces. Examples of calculating the attenuation coefficient in the rectangular waveguide with rough screening surfaces in a terahertz frequency range are presented. The influence of the size and shape of the rough surface profile irregularities on the waveguide atten

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7

T. V., Smitha, Madhura S, Shreya N, and Sahana Udupa. "Optical Waveguides and Terahertz Signal by Finite Element Method: A Survey." June 2021 3, no. 2 (2021): 68–86. http://dx.doi.org/10.36548/jsws.2021.2.002.

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This paper examines the use of the Finite Element Method (FEM) in the field of optical waveguides and terahertz signals, with the main goal of explaining how this method aids in recent advances in this field. The basics of FEM are briefly reviewed, and the technique's application to waveguide discontinuity analysis is observed. Second-order and higher-order derivatives result from optical waveguide modeling, which is significant for information exchange and many other nonlinear phenomena. The use of FEM in the improvised design of hexagonal sort air hole porous core microstructure fibers, whic

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8

Tuniz, Alessandro. "Nanoscale nonlinear plasmonics in photonic waveguides and circuits." La Rivista del Nuovo Cimento 44, no. 4 (2021): 193–249. http://dx.doi.org/10.1007/s40766-021-00018-7.

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AbstractOptical waveguides are the key building block of optical fiber and photonic integrated circuit technology, which can benefit from active photonic manipulation to complement their passive guiding mechanisms. A number of emerging applications will require faster nanoscale waveguide circuits that produce stronger light-matter interactions and consume less power. Functionalities that rely on nonlinear optics are particularly attractive in terms of their femtosecond response times and terahertz bandwidth, but typically demand high powers or large footprints when using dielectrics alone. Pla

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9

Kalhor, Samane, Majid Ghanaatshoar, Hannah J. Joyce, David A. Ritchie, Kazuo Kadowaki, and Kaveh Delfanazari. "Millimeter-Wave-to-Terahertz Superconducting Plasmonic Waveguides for Integrated Nanophotonics at Cryogenic Temperatures." Materials 14, no. 15 (2021): 4291. http://dx.doi.org/10.3390/ma14154291.

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Plasmonics, as a rapidly growing research field, provides new pathways to guide and modulate highly confined light in the microwave-to-optical range of frequencies. We demonstrated a plasmonic slot waveguide, at the nanometer scale, based on the high-transition-temperature (Tc) superconductor Bi2Sr2CaCu2O8+δ (BSCCO), to facilitate the manifestation of chip-scale millimeter wave (mm-wave)-to-terahertz (THz) integrated circuitry operating at cryogenic temperatures. We investigated the effect of geometrical parameters on the modal characteristics of the BSCCO plasmonic slot waveguide between 100

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10

Khan, Muhammad Talal Ali, Haisu Li, Nathan Nam Minh Duong, Andrea Blanco‐Redondo, and Shaghik Atakaramians. "Terahertz Waveguide: 3D‐Printed Terahertz Topological Waveguides (Adv. Mater. Technol. 7/2021)." Advanced Materials Technologies 6, no. 7 (2021): 2170040. http://dx.doi.org/10.1002/admt.202170040.

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11

Xue, Jiu-Ling, Lan-Lan Xu, Tian-Tian Wang, Ya-Xian Fan, and Zhi-Yong Tao. "Terahertz Thermal Sensing by Using a Defect-Containing Periodically Corrugated Gold Waveguide." Applied Sciences 10, no. 12 (2020): 4365. http://dx.doi.org/10.3390/app10124365.

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A terahertz (THz) thermal sensor has been developed by using a periodically corrugated gold waveguide. A defect was positioned in the middle of this waveguide. The periodicities of waveguides can result in Bragg and non-Bragg gaps with identical and different transverse mode resonances, respectively. Due to the local resonance of the energy concentration in the inserted tube, a non-Bragg defect state (NBDS) was observed to arise in the non-Bragg gap. It exhibited an extremely narrow transmission peak. The numerical results showed that by using the here proposed waveguide structure, a NBDS woul

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12

Gallot, G., S. P. Jamison, R. W. McGowan, and D. Grischkowsky. "Terahertz waveguides." Journal of the Optical Society of America B 17, no. 5 (2000): 851. http://dx.doi.org/10.1364/josab.17.000851.

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13

Argyros, Alexander. "Microstructures in Polymer Fibres for Optical Fibres, THz Waveguides, and Fibre-Based Metamaterials." ISRN Optics 2013 (February 12, 2013): 1–22. http://dx.doi.org/10.1155/2013/785162.

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This paper reviews the topic of microstructured polymer fibres in the fields in which these have been utilised: microstructured optical fibres, terahertz waveguides, and fibre-drawn metamaterials. Microstructured polymer optical fibres were initially investigated in the context of photonic crystal fibre research, and several unique features arising from the combination of polymer and microstructure were identified. This lead to investigations in sensing, particularly strain sensing based on gratings, and short-distance data transmission. The same principles have been extended to waveguides at

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14

Weikle, Robert M., H. Li, A. Arsenovic, et al. "Micromachined Interfaces for Metrology and Packaging Applications in the Submillimeter-Wave Band." Additional Conferences (Device Packaging, HiTEC, HiTEN, and CICMT) 2017, DPC (2017): 1–36. http://dx.doi.org/10.4071/2017dpc-tha3_presentation2.

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The continued emergence of new terahertz devices has created a need for improved approaches to packaging, integration, and measurement tools for diagnostics and characterization in this portion of the spectrum. Rectangular waveguide has for many years been the primary transmission medium for terahertz and submillimeter-wave systems operating from 300 GHz to 1 THz, with the UG-387 flange the most common interface for mating waveguide components over this frequency range. Alignment of UG-387 flanges is accomplished with pins and alignment holes that are placed around the flange perimeter and, un

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15

Shen, Wenwei, Jingya Xie, Xiaofei Zang, Li Ding, and Lin Chen. "Coupling terahertz wave into a plasmonic waveguide by using two ribbon waveguides." Results in Physics 19 (December 2020): 103653. http://dx.doi.org/10.1016/j.rinp.2020.103653.

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16

Andrews, Steven R. "Microstructured terahertz waveguides." Journal of Physics D: Applied Physics 47, no. 37 (2014): 374004. http://dx.doi.org/10.1088/0022-3727/47/37/374004.

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17

Atakaramians, Shaghik, Shahraam Afshar V., Tanya M. Monro, and Derek Abbott. "Terahertz dielectric waveguides." Advances in Optics and Photonics 5, no. 2 (2013): 169. http://dx.doi.org/10.1364/aop.5.000169.

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18

Hasan, Md Rabiul, S. Ali, and S. A. Emi. "Ultra-low material loss microstructure fiber for terahertz guidance." Photonics Letters of Poland 9, no. 2 (2017): 66. http://dx.doi.org/10.4302/plp.v9i2.679.

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In this letter, we numerically demonstrate a hybrid-core microstructure fiber for low-loss terahertz guidance. Finite element method with circular perfectly matched layer boundary condition is applied to characterize the guiding properties. It is shown that by using a triangular-core inside a square lattice microstructure exhibits ultra-low effective material loss (EML) of 0.169 dB/cm and low confinement loss of 0.087 dB/cm at the operating frequency of 0.75 THz. We also discuss how other guiding properties including power fraction, single mode propagation and dispersion vary with changing of

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19

Kouzaev, Guennadi A. "Graphene H-Waveguide for Terahertz Lasing Applications: Electromagnetic Quasi-Linear Theory." Nanomaterials 10, no. 12 (2020): 2415. http://dx.doi.org/10.3390/nano10122415.

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A novel graphene H-waveguide is proposed for active terahertz components. A graphene film illuminated by strong pumping light shorts the parallel conductor plates. The terahertz modes propagating along this film are amplified at certain conditions. A rigorous electromagnetic (EM) quasi-linear method of analytical calculations of TEy and TMy eigenmodes is used in this paper to select these conditions. Among them is the use of bound TEy modes interacting with graphene plasmons at frequencies of negative graphene resistance, minimizing conductor loss associated with parallel plates, and excluding

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20

Ayvazyan, M. Ts, Yu N. Kazantsev, and R. M. Martirosyan. "Waveguides for Terahertz Range." Физические основы приборостроения 5, no. 1 (2016): 28–35. http://dx.doi.org/10.25210/jfop-1601-028035.

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21

Guerboukha, Hichem, Guofeng Yan, Olga Skorobogata, and Maksim Skorobogatiy. "Silk Foam Terahertz Waveguides." Advanced Optical Materials 2, no. 12 (2014): 1181–92. http://dx.doi.org/10.1002/adom.201400228.

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22

Nam, Sung Hyun, Antoinette J. Taylor, and Anatoly Efimov. "Subwavelength hybrid terahertz waveguides." Optics Express 17, no. 25 (2009): 22890. http://dx.doi.org/10.1364/oe.17.022890.

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23

Choe, Wonseok, and Jinho Jeong. "A Broadband THz On-Chip Transition Using a Dipole Antenna with Integrated Balun." Electronics 7, no. 10 (2018): 236. http://dx.doi.org/10.3390/electronics7100236.

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A waveguide-to-microstrip transition is an essential component for packaging integrated circuits (ICs) in rectangular waveguides, especially at millimeter-wave and terahertz (THz) frequencies. At THz frequencies, the on-chip transitions, which are monolithically integrated in ICs are preferred to off-chip transitions, as the former can eliminate the wire-bonding process, which can cause severe impedance mismatch and additional insertion loss of the transitions. Therefore, on-chip transitions can allow the production of low cost and repeatable THz modules. However, on-chip transitions show limi

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24

Goy, Claudia, Maik Scheller, Benedikt Scherger, Vincent P. Wallace, and Martin Koch. "Terahertz waveguide prism." Optics Express 21, no. 16 (2013): 19292. http://dx.doi.org/10.1364/oe.21.019292.

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25

Kumar, Gagan. "Controlling Terahertz Surface Plasmon Properties on a Periodically Structured Silicon Surface." Journal of Spectroscopy 2015 (2015): 1–8. http://dx.doi.org/10.1155/2015/543985.

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The paper presents experimental and numerical investigations on the terahertz (THz) surface plasmon propagation in a periodically patterned doped silicon substrate. Silicon substrates are periodically patterned with 2D array of vertical structures forming a plasmonic waveguide. The waveguide configurations are found to support resonant surface modes at certain frequencies which can occur anywhere depending on the structural parameters. The 2D pattern of vertical structures is observed to affect the THz surface plasmon propagation along the waveguide configuration. The periodicities are changed

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26

Jie Yang, Jie Yang, Yueping Niu Yueping Niu, Gongwei Lin Gongwei Lin, Yihong Qi Yihong Qi, and Shangqing Gong Shangqing Gong. "Zero-dispersion waveguide of sub-skin-depth terahertz plasmons using metallic nanowires." Chinese Optics Letters 11, no. 8 (2013): 082401–82404. http://dx.doi.org/10.3788/col201311.082401.

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27

Fujita, Kazuue, Shohei Hayashi, Akio Ito, Masahiro Hitaka, and Tatsuo Dougakiuchi. "Sub-terahertz and terahertz generation in long-wavelength quantum cascade lasers." Nanophotonics 8, no. 12 (2019): 2235–41. http://dx.doi.org/10.1515/nanoph-2019-0238.

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AbstractTerahertz quantum cascade laser sources with intra-cavity non-linear frequency mixing are the first room-temperature electrically pumped monolithic semiconductor sources that operate in the 1.2–5.9 THz spectral range. However, high performance in low-frequency range is difficult because converted terahertz waves suffer from significantly high absorption in waveguides. Here, we report a sub-terahertz electrically pumped monolithic semiconductor laser. This sub-terahertz source is based on a high-performance, long-wavelength (λ ≈ 13.7 μm) quantum cascade laser in which high-efficiency te

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28

Ayvazyan, M. Ts, M. G. Khachatryan, and S. Kh Khudaverdyan. "Integrated form of the waveguide circuits in the terahertz range." Radio industry (Russia) 30, no. 4 (2020): 72–78. http://dx.doi.org/10.21778/2413-9599-2020-30-4-72-78.

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Problem statement. The successful development of the terahertz range is inextricably linked to the creation of effective guide systems with the required characteristics, as well as a complete set of functional elements. Known guide systems of the specified range for several reasons do not allow creating a complete set of functional elements and circuits for various purposes. In this paper, the authors consider the principles of creating modular waveguide circuits based on a metaldielectric waveguide.Objective. Study of the issues of creating waveguide circuits for various purposes in an integr

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29

Kurayev, A. A., and V. V. Matveyenka. "TERAHERTZ TRAVELING-WAVE TUBE ON A RECTANGULAR WAVEGUIDE FOLDED IN A CIRCULAR SPIRAL." Doklady BGUIR, no. 7-8 (December 29, 2019): 81–85. http://dx.doi.org/10.35596/1729-7648-2019-126-8-81-85.

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The most promising in the THz range is traveling-wave tubes (TWTs) and backward-wave tubes (BWTs) on a serpentine-curved (zigzag-rolled) rectangular waveguide. They are implemented in the THz range (220 GHz), although their characteristics are far from satisfactory due to the strict restriction on the tape electron beam width, that does not allow reaching the summarizing beam current optimum level. To replace the zigzag convoluted waveguide with the spiraled for the TWT and BWT on a curved rectangular waveguide is the best way to remove the ribbon beam width restriction. In the early TWT and B

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30

Liu Jing, 刘婧, 沈京玲 Shen Jingling, and 张存林 Zhang Cunlin. "Progress of Terahertz Polymer Waveguides." Laser & Optoelectronics Progress 52, no. 8 (2015): 080003. http://dx.doi.org/10.3788/lop52.080003.

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31

Pahlevaninezhad, Hamid, Barmak Heshmat, and Thomas Edward Darcie. "Efficient terahertz slot-line waveguides." Optics Express 19, no. 26 (2011): B47. http://dx.doi.org/10.1364/oe.19.000b47.

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32

Mridha, Manoj Kumar, Anna Mazhorova, Matteo Clerici, et al. "Active terahertz two-wire waveguides." Optics Express 22, no. 19 (2014): 22340. http://dx.doi.org/10.1364/oe.22.022340.

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33

Lai, Chih-Hsien, Yu-Chun Hsueh, Hung-Wen Chen, Yuh-jing Huang, Hung-chun Chang, and Chi-Kuang Sun. "Low-index terahertz pipe waveguides." Optics Letters 34, no. 21 (2009): 3457. http://dx.doi.org/10.1364/ol.34.003457.

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34

Nagel, Michael, Astrid Marchewka, and Heinrich Kurz. "Low-index discontinuity terahertz waveguides." Optics Express 14, no. 21 (2006): 9944. http://dx.doi.org/10.1364/oe.14.009944.

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35

Yeh, Cavour, Fred Shimabukuro, and Peter H. Siegel. "Low-loss terahertz ribbon waveguides." Applied Optics 44, no. 28 (2005): 5937. http://dx.doi.org/10.1364/ao.44.005937.

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36

Lu, Ja-Yu, Borwen You, Jiun-You Wang, Sheng-Syong Jhuo, Tun-Yao Hung, and Ching-Ping Yu. "Volatile Gas Sensing through Terahertz Pipe Waveguide." Sensors 20, no. 21 (2020): 6268. http://dx.doi.org/10.3390/s20216268.

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Gas sensing to recognize volatile liquids is successfully conducted through pipe-guided terahertz (THz) radiation in a reflective and label-free manner. The hollow core of a pipe waveguide can efficiently deliver the sensing probe of the THz confined waveguide fields to any place where dangerous vapors exist. Target vapors that naturally diffuse from a sample site into the pipe core can be detected based on strong interaction between the probe and analyte. The power variation of the THz reflectance spectrum in response to various types and densities of vapors are characterized experimentally u

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37

Shi, Wei, and Yujie J. Ding. "Designs of terahertz waveguides for efficient parametric terahertz generation." Applied Physics Letters 82, no. 25 (2003): 4435–37. http://dx.doi.org/10.1063/1.1584513.

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38

Minin, Igor V., and Oleg V. Minin. "PROBLEMS OF TERAHERTZ RADIATION METROLOGY IN MEDICINE." Vestnik SSUGT (Siberian State University of Geosystems and Technologies) 26, no. 3 (2021): 162–80. http://dx.doi.org/10.33764/2411-1759-2021-26-3-162-180.

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The purpose of this work is to consider the issue of safe propagation of terahertz radiation in bio-logical objects. The article gives a brief review of studies of the influence mechanisms of terahertz radiation on biological environments. It considers optical characteristics of blood and its components in the THz frequency range. It is found that the boundaries of the terahertz wavelength range are not precisely defined. It is established that the recently discovered "photon jet" effect allows terahertz ra-diation to penetrate biological objects to considerable depths, due to the effect of a

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39

Jie Yang, Jie Yang, Gongwei Lin Gongwei Lin, Yueping Niu Yueping Niu, Yihong Qi Yihong Qi, Fengxue Zhou Fengxue Zhou, and and Shangqing Gong and Shangqing Gong. "Propagation properties of the terahertz waveguide using a metallic nanoslit narrower than skin depth." Chinese Optics Letters 14, no. 7 (2016): 072401–72404. http://dx.doi.org/10.3788/col201614.072401.

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40

Dai, Tianyi, Fei Zhao, Cong Zhang, et al. "Terahertz multi-band unidirectional reflectionless phenomenon in a MIM plasmonic waveguide system based on near-field coupling." Journal of Nonlinear Optical Physics & Materials 28, no. 01 (2019): 1950008. http://dx.doi.org/10.1142/s0218863519500085.

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Dual-band unidirectional reflectionlessness is investigated in a system consisting of three stub resonators side-coupled to a metal-insulator-metal plasmonic waveguide based on near-field coupling in terahertz domain. Reflectivities of [Formula: see text] and [Formula: see text], respectively, at two exceptional points 4.11[Formula: see text]THz and 4.695[Formula: see text]THz are obtained for forward (backward) direction. More than that multi-band unidirectional reflectionlessness is demonstrated based on multi-stub resonators side-coupled to an MIM plasmonic waveguide.

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41

Rajarajan, Muttukrishnan, Christos Themistos, B. M. A. Rahman, and Kenneth T. V. Grattan. "Plasmonics in Metal-clad Terahertz Waveguides." PIERS Online 3, no. 3 (2007): 294–99. http://dx.doi.org/10.2529/piers060907092948.

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42

Lu, Jen-Tang, Chih-Hsien Lai, Tzu-Fang Tseng, et al. "Terahertz polarization-sensitive rectangular pipe waveguides." Optics Express 19, no. 22 (2011): 21532. http://dx.doi.org/10.1364/oe.19.021532.

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43

Shu-Qin, Lou, Guo Tie-Ying, Fang Hong, Li Hong-Lei, and Jian Shui-Sheng. "A New Type of Terahertz Waveguides." Chinese Physics Letters 23, no. 1 (2006): 235–38. http://dx.doi.org/10.1088/0256-307x/23/1/068.

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44

Huaiwu, Zhang. "Photonic Crystal Waveguides in Terahertz Regime." Journal of Physics: Conference Series 276 (February 1, 2011): 012009. http://dx.doi.org/10.1088/1742-6596/276/1/012009.

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45

Lu, Jen-Tang, Yu-Chun Hsueh, Yu-Ru Huang, Yuh-Jing Hwang, and Chi-Kuang Sun. "Bending loss of terahertz pipe waveguides." Optics Express 18, no. 25 (2010): 26332. http://dx.doi.org/10.1364/oe.18.026332.

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46

Bingham, A. L., and D. R. Grischkowsky. "Terahertz 2-D Photonic Crystal Waveguides." IEEE Microwave and Wireless Components Letters 18, no. 7 (2008): 428–30. http://dx.doi.org/10.1109/lmwc.2008.924906.

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47

Li, Haisu, Han Xiao, Jin Yuan, et al. "Terahertz polarization-maintaining subwavelength dielectric waveguides." Journal of Optics 20, no. 12 (2018): 125602. http://dx.doi.org/10.1088/2040-8986/aaea58.

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48

Pahlevaninezhad, H., B. Heshmat, and T. E. Darcie. "Advances in Terahertz Waveguides and Sources." IEEE Photonics Journal 3, no. 2 (2011): 307–10. http://dx.doi.org/10.1109/jphot.2011.2128303.

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49

Qasymeh, Montasir. "Terahertz Generation in Nonlinear Plasmonic Waveguides." IEEE Journal of Quantum Electronics 52, no. 4 (2016): 1–7. http://dx.doi.org/10.1109/jqe.2016.2531986.

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Azar, O. Abbaszadeh, M. Abdi, and H. Baghban. "Graphene-Based Terahertz Waveguide Amplifier." Procedia Materials Science 11 (2015): 270–74. http://dx.doi.org/10.1016/j.mspro.2015.11.032.

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