Pub Date : 2018-09-01DOI: 10.1109/IRMMW-THZ.2018.8510061
T. Matsui, R. Yoshida, Kazuki Omura
We have numerically analyzed an electron beam -induced Airy beam-like terahertz (THz) radiation from graded metallic grating structures with graded groove spacing (GGS) based on a simplified particle-in-cell finite-difference time-domain method. Airy beam-like directional THz beams are obtained from GGSs designed to give appropriate phase delay in each scattered radiation from each grooves. Our findings may open the way for a development of novel THz radiation source based on the wide variety of metallic grating structures.
{"title":"Electron Beam-Induced Airy Beam-Like THz Radiation from Graded Metallic Grating","authors":"T. Matsui, R. Yoshida, Kazuki Omura","doi":"10.1109/IRMMW-THZ.2018.8510061","DOIUrl":"https://doi.org/10.1109/IRMMW-THZ.2018.8510061","url":null,"abstract":"We have numerically analyzed an electron beam -induced Airy beam-like terahertz (THz) radiation from graded metallic grating structures with graded groove spacing (GGS) based on a simplified particle-in-cell finite-difference time-domain method. Airy beam-like directional THz beams are obtained from GGSs designed to give appropriate phase delay in each scattered radiation from each grooves. Our findings may open the way for a development of novel THz radiation source based on the wide variety of metallic grating structures.","PeriodicalId":6653,"journal":{"name":"2018 43rd International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz)","volume":"40 1","pages":"1-2"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87507242","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}
Pub Date : 2018-09-01DOI: 10.1109/IRMMW-THZ.2018.8510517
Anwen Smith, A. Klein, C. Balocco, N. Shirshova
A macroporous polymer prepared by radical polymerization of high internal phase emulsions (HIPE) is evaluated as a substrate for THz spectroscopy of aqueous solutions. The synthesis, microstructure and THz properties of these polymerized HIPEs (polyHIPEs) are discussed. Their performance is evaluated by measuring the insecticide methomyl in an aqueous solution with a THz Network Analyzer and THz-TDS.
{"title":"Porous Polymers as a Substrate for Terahertz Spectroscopy","authors":"Anwen Smith, A. Klein, C. Balocco, N. Shirshova","doi":"10.1109/IRMMW-THZ.2018.8510517","DOIUrl":"https://doi.org/10.1109/IRMMW-THZ.2018.8510517","url":null,"abstract":"A macroporous polymer prepared by radical polymerization of high internal phase emulsions (HIPE) is evaluated as a substrate for THz spectroscopy of aqueous solutions. The synthesis, microstructure and THz properties of these polymerized HIPEs (polyHIPEs) are discussed. Their performance is evaluated by measuring the insecticide methomyl in an aqueous solution with a THz Network Analyzer and THz-TDS.","PeriodicalId":6653,"journal":{"name":"2018 43rd International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz)","volume":"11 1","pages":"1-2"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87655027","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}
Pub Date : 2018-09-01DOI: 10.1109/IRMMW-THZ.2018.8509873
Y. Tojima, M. Kinoshita, H. Iida, K. Fujii
In this study, an accurate calorimeter was developed for measuring radio-frequency power in the WR-5 waveguide band (140–220 GHz). To demonstrate a high-precision calorimetric measurement, the influence of heat leakage in an adiabatic waveguide (AW) of the calorimeter was investigated. Thermal responses by heat generation due to loss of the AW were independently measured using a gold foil shield. The index $rho$ that represents the ratio of heat leakage to the total generated heat in the AW was estimated by analyzing the thermal response and scattering parameters of the AW. As a result, the index $rho$ was found to be 0.50 ± 0.05 in the frequency range of 140–220 GHz.
{"title":"Evaluation of Thermal Leakage in WR-5 Waveguide Calorimeter","authors":"Y. Tojima, M. Kinoshita, H. Iida, K. Fujii","doi":"10.1109/IRMMW-THZ.2018.8509873","DOIUrl":"https://doi.org/10.1109/IRMMW-THZ.2018.8509873","url":null,"abstract":"In this study, an accurate calorimeter was developed for measuring radio-frequency power in the WR-5 waveguide band (140–220 GHz). To demonstrate a high-precision calorimetric measurement, the influence of heat leakage in an adiabatic waveguide (AW) of the calorimeter was investigated. Thermal responses by heat generation due to loss of the AW were independently measured using a gold foil shield. The index $rho$ that represents the ratio of heat leakage to the total generated heat in the AW was estimated by analyzing the thermal response and scattering parameters of the AW. As a result, the index $rho$ was found to be 0.50 ± 0.05 in the frequency range of 140–220 GHz.","PeriodicalId":6653,"journal":{"name":"2018 43rd International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz)","volume":"60 1","pages":"1-2"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87013541","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}
Pub Date : 2018-09-01DOI: 10.1109/IRMMW-THZ.2018.8510319
J. Boland, K. Peng, Sarwat A. Baig, D. Damry, P. Parkinson, L. Fu, H. Hoe Tan, C. Jagadish, L. Herz, H. Joyce, M. Johnston
In this work, we demonstrate novel THz detectors and modulators based on semiconductor nanowires. We show that single nanowire PC THz receivers exhibit excellent sensitivity, high SNR of 40, and a broad detection bandwidth up to 2 THz, comparable to the bulk InP PC receivers. We also demonstrate ultrafast THz modulation by GaAs nanowire polarisers with a less than 5ps switching time and a modulation depth of −8dB, We show an extinction of over 13% and dynamic range of −9dB, comparable to microsecond-switchable graphene- and metamaterial-based THz modulators.
{"title":"The Route to Nanoscale Terahertz Technology: Nanowire-based Terahertz Detectors and Terahertz Modulators","authors":"J. Boland, K. Peng, Sarwat A. Baig, D. Damry, P. Parkinson, L. Fu, H. Hoe Tan, C. Jagadish, L. Herz, H. Joyce, M. Johnston","doi":"10.1109/IRMMW-THZ.2018.8510319","DOIUrl":"https://doi.org/10.1109/IRMMW-THZ.2018.8510319","url":null,"abstract":"In this work, we demonstrate novel THz detectors and modulators based on semiconductor nanowires. We show that single nanowire PC THz receivers exhibit excellent sensitivity, high SNR of 40, and a broad detection bandwidth up to 2 THz, comparable to the bulk InP PC receivers. We also demonstrate ultrafast THz modulation by GaAs nanowire polarisers with a less than 5ps switching time and a modulation depth of −8dB, We show an extinction of over 13% and dynamic range of −9dB, comparable to microsecond-switchable graphene- and metamaterial-based THz modulators.","PeriodicalId":6653,"journal":{"name":"2018 43rd International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz)","volume":"160 1","pages":"1-2"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86274494","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}
Pub Date : 2018-09-01DOI: 10.1109/IRMMW-THZ.2018.8510085
M. Zaborowski, P. Zagrajek, D. Tomaszewski, J. Zajac, J. Marczewski
This paper describes a THz detector based on junctionless FET with integrated 340GHz patch antenna and cascode preamplifier. 20dB cascode gain was measured. It is essential that the preamplifier can work with a single bias and consume small power of several $mumathrm{W}$.
{"title":"Cascode Enhanced Junctionless Field Effect Transistor THz Detector","authors":"M. Zaborowski, P. Zagrajek, D. Tomaszewski, J. Zajac, J. Marczewski","doi":"10.1109/IRMMW-THZ.2018.8510085","DOIUrl":"https://doi.org/10.1109/IRMMW-THZ.2018.8510085","url":null,"abstract":"This paper describes a THz detector based on junctionless FET with integrated 340GHz patch antenna and cascode preamplifier. 20dB cascode gain was measured. It is essential that the preamplifier can work with a single bias and consume small power of several $mumathrm{W}$.","PeriodicalId":6653,"journal":{"name":"2018 43rd International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz)","volume":"6 1","pages":"1-2"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82934160","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}
Pub Date : 2018-09-01DOI: 10.1109/IRMMW-THZ.2018.8509967
Jianwei Liu, X. Niu, Ying-hui Liu, Hui Wang, G. Guo, Xu Sun
Vector method for high power microwave phase retrieval has been proposed. Based on Stratton-Chu formula and the measured data of infrared images on several positions of the high power microwave, phase distribution of the major electric field component $E_{y}$ has been reconstructed through iteration method. Simulation results show the correlation coefficient at the position X1, X2, X3 is 99.59%, 99.78%, 99.86%, respectively.
{"title":"Vector Method for High Power Microwave Phase Retrieval Using IR Images","authors":"Jianwei Liu, X. Niu, Ying-hui Liu, Hui Wang, G. Guo, Xu Sun","doi":"10.1109/IRMMW-THZ.2018.8509967","DOIUrl":"https://doi.org/10.1109/IRMMW-THZ.2018.8509967","url":null,"abstract":"Vector method for high power microwave phase retrieval has been proposed. Based on Stratton-Chu formula and the measured data of infrared images on several positions of the high power microwave, phase distribution of the major electric field component $E_{y}$ has been reconstructed through iteration method. Simulation results show the correlation coefficient at the position X1, X2, X3 is 99.59%, 99.78%, 99.86%, respectively.","PeriodicalId":6653,"journal":{"name":"2018 43rd International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz)","volume":"39 1","pages":"1-2"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86600357","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}
Pub Date : 2018-09-01DOI: 10.1109/IRMMW-THZ.2018.8510442
Ramazan Cetin, Ozan Erturk, T. Akin
This study presents design, analysis, optimization, and fabrication of umbrella structures as an efficient quarter wave absorber within the Long Wave Infrared (LWIR) range for uncooled IR detectors. Both the effect of the ni-chrome (NiCr) layer and effect of varying pixel pitch sizes on the IR absorption performance of the umbrella structures are examined. An average of 96% absorption is measured for the optimized case within the LWIRrange.
{"title":"Design, Analysis and Implementation of Quarter-wave Absorber Structure for Uncooled Infrared Detectors with High Fill Factor","authors":"Ramazan Cetin, Ozan Erturk, T. Akin","doi":"10.1109/IRMMW-THZ.2018.8510442","DOIUrl":"https://doi.org/10.1109/IRMMW-THZ.2018.8510442","url":null,"abstract":"This study presents design, analysis, optimization, and fabrication of umbrella structures as an efficient quarter wave absorber within the Long Wave Infrared (LWIR) range for uncooled IR detectors. Both the effect of the ni-chrome (NiCr) layer and effect of varying pixel pitch sizes on the IR absorption performance of the umbrella structures are examined. An average of 96% absorption is measured for the optimized case within the LWIRrange.","PeriodicalId":6653,"journal":{"name":"2018 43rd International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz)","volume":"51 1","pages":"1-2"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86751286","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}
Pub Date : 2018-09-01DOI: 10.1109/irmmw-thz.2018.8510106
{"title":"Venue Nagoya Congress Center (NCC)","authors":"","doi":"10.1109/irmmw-thz.2018.8510106","DOIUrl":"https://doi.org/10.1109/irmmw-thz.2018.8510106","url":null,"abstract":"","PeriodicalId":6653,"journal":{"name":"2018 43rd International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz)","volume":"9 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89046233","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}
Pub Date : 2018-09-01DOI: 10.1109/IRMMW-THZ.2018.8510118
Chao Shu, Shaoqing Hu, Yuan Yao, Xiao-dong Chen
This paper presents our study on an offset parabolic reflector antenna with Polarization-Division Multiplexing capability operating at 300 GHz for terahertz communication systems that can achieve twofold data rate without increasing system bandwidth. The antenna based on the dual gridded structure is capable of operating in two orthogonal polarizations simultaneously with a similar level of high gain by using two feeds.
{"title":"A High-gain Antenna with Polarization-Division Multiplexing for Terahertz Wireless Communications","authors":"Chao Shu, Shaoqing Hu, Yuan Yao, Xiao-dong Chen","doi":"10.1109/IRMMW-THZ.2018.8510118","DOIUrl":"https://doi.org/10.1109/IRMMW-THZ.2018.8510118","url":null,"abstract":"This paper presents our study on an offset parabolic reflector antenna with Polarization-Division Multiplexing capability operating at 300 GHz for terahertz communication systems that can achieve twofold data rate without increasing system bandwidth. The antenna based on the dual gridded structure is capable of operating in two orthogonal polarizations simultaneously with a similar level of high gain by using two feeds.","PeriodicalId":6653,"journal":{"name":"2018 43rd International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz)","volume":"91 1","pages":"1-2"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89071912","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}
Pub Date : 2018-09-01DOI: 10.1109/IRMMW-THZ.2018.8510073
D. Kissinger, N. Rothbart, K. Schmalz, J. Bornzraber, H. Hübers
We present a millimeter-wave/terahertz (mmW/THz) gas spectroscopy sensor system based on SiGe BiCMOS technology. We demonstrate spatial combining of two transmitters which allows for a total spectral coverage of up to 50 GHz. SiGe technology can achieve a high integration level and low costs in case of large scale production. MmW/ THz gas sensors can be used for instance for the medical analysis of human breath or for the detection of toxic industrial chemicals.
{"title":"Sensitive Millimeter-Wave/Terahertz Gas Spectroscopy Based on SiGe BiCMOS Technology","authors":"D. Kissinger, N. Rothbart, K. Schmalz, J. Bornzraber, H. Hübers","doi":"10.1109/IRMMW-THZ.2018.8510073","DOIUrl":"https://doi.org/10.1109/IRMMW-THZ.2018.8510073","url":null,"abstract":"We present a millimeter-wave/terahertz (mmW/THz) gas spectroscopy sensor system based on SiGe BiCMOS technology. We demonstrate spatial combining of two transmitters which allows for a total spectral coverage of up to 50 GHz. SiGe technology can achieve a high integration level and low costs in case of large scale production. MmW/ THz gas sensors can be used for instance for the medical analysis of human breath or for the detection of toxic industrial chemicals.","PeriodicalId":6653,"journal":{"name":"2018 43rd International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz)","volume":"11 1","pages":"1-2"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88837928","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}
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