Pub Date : 2020-11-08DOI: 10.1109/IRMMW-THz46771.2020.9370478
P. Piedimonte, F. Centurelli, F. Palma
In this paper we reconsider the theory of the THz detection in a MOS-FET structure in the optic of new model of the self-mixing rectification process occurring in depleted portion of a semiconductors. Technology Computer-Aided Design software simulations, using the Harmonic Balance analysis, will be adopted as evaluation tool. The proposed considerations suggest that self-mixing effect in the substrate can be more relevant in determining the rectification process. In the authors opinion, this approach substantially improves understanding of the THz rectification in semiconductors and in particular in MOS-FET structures.
{"title":"A revision of the theory of THz detection by MOS-FET in the light of the self-mixing model in the substrate","authors":"P. Piedimonte, F. Centurelli, F. Palma","doi":"10.1109/IRMMW-THz46771.2020.9370478","DOIUrl":"https://doi.org/10.1109/IRMMW-THz46771.2020.9370478","url":null,"abstract":"In this paper we reconsider the theory of the THz detection in a MOS-FET structure in the optic of new model of the self-mixing rectification process occurring in depleted portion of a semiconductors. Technology Computer-Aided Design software simulations, using the Harmonic Balance analysis, will be adopted as evaluation tool. The proposed considerations suggest that self-mixing effect in the substrate can be more relevant in determining the rectification process. In the authors opinion, this approach substantially improves understanding of the THz rectification in semiconductors and in particular in MOS-FET structures.","PeriodicalId":6746,"journal":{"name":"2020 45th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz)","volume":"35 1","pages":"01-02"},"PeriodicalIF":0.0,"publicationDate":"2020-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73885693","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 : 2020-11-08DOI: 10.1109/IRMMW-THz46771.2020.9370596
T. Buchmann, E. Kelleher, Binbin Zhou, M. Jazbinšek, Jin‐Hong Seok, O. Kwon, F. Rotermund, P. Jepsen
We demonstrate 1.4 milliwatt average power, broadband terahertz generation extending up to 6 THz at 10 MHz repetition rate through optical rectification in the organic crystal HMQ-TMS. The pump source is based on a simple external pulse compression scheme for the generation of ultra-short pulses using compact Yb:fiber laser technology.
{"title":"Milliwatt-level multi-MHz THz wave generation in the organic crystal HMQTMS with a compressed fiber laser","authors":"T. Buchmann, E. Kelleher, Binbin Zhou, M. Jazbinšek, Jin‐Hong Seok, O. Kwon, F. Rotermund, P. Jepsen","doi":"10.1109/IRMMW-THz46771.2020.9370596","DOIUrl":"https://doi.org/10.1109/IRMMW-THz46771.2020.9370596","url":null,"abstract":"We demonstrate 1.4 milliwatt average power, broadband terahertz generation extending up to 6 THz at 10 MHz repetition rate through optical rectification in the organic crystal HMQ-TMS. The pump source is based on a simple external pulse compression scheme for the generation of ultra-short pulses using compact Yb:fiber laser technology.","PeriodicalId":6746,"journal":{"name":"2020 45th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz)","volume":"44 1","pages":"1-2"},"PeriodicalIF":0.0,"publicationDate":"2020-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75800449","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 : 2020-11-08DOI: 10.1109/IRMMW-THz46771.2020.9370446
Xueqing Liu, T. Ytterdal, M. Shur
We present the results of the current driven TeraFET detection that are in good agreement with the unified charge control TeraFET SPICE model. The measured data show over one order of magnitude increase in the response compared to the zero current response and validate the multiple segments THz SPICE unified charge model for the response simulation in the saturation regime at sub-THz and THz frequencies.
{"title":"Current-driven TeraFET Detector","authors":"Xueqing Liu, T. Ytterdal, M. Shur","doi":"10.1109/IRMMW-THz46771.2020.9370446","DOIUrl":"https://doi.org/10.1109/IRMMW-THz46771.2020.9370446","url":null,"abstract":"We present the results of the current driven TeraFET detection that are in good agreement with the unified charge control TeraFET SPICE model. The measured data show over one order of magnitude increase in the response compared to the zero current response and validate the multiple segments THz SPICE unified charge model for the response simulation in the saturation regime at sub-THz and THz frequencies.","PeriodicalId":6746,"journal":{"name":"2020 45th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz)","volume":"43 1","pages":"01-02"},"PeriodicalIF":0.0,"publicationDate":"2020-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75812562","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 : 2020-11-08DOI: 10.1109/IRMMW-THz46771.2020.9370628
J. Steven Dodge, Laleh Mohtashemi, Paul Westlund, P. Mousavi, D. Sahota
We present a maximum-likelihood framework for analyzing terahertz time-domain spectroscopy measurements. This approach has several advantages other commonly-used methods, especially for evaluating goodness of fit. We also demonstrate a simple time-domain noise model that accurately describes the noise amplitude in a set of repeated measurements. These techniques are broadly applicable to material parameter estimation.
{"title":"A maximum-likelihood analysis framework for terahertz time-domain spectroscopy","authors":"J. Steven Dodge, Laleh Mohtashemi, Paul Westlund, P. Mousavi, D. Sahota","doi":"10.1109/IRMMW-THz46771.2020.9370628","DOIUrl":"https://doi.org/10.1109/IRMMW-THz46771.2020.9370628","url":null,"abstract":"We present a maximum-likelihood framework for analyzing terahertz time-domain spectroscopy measurements. This approach has several advantages other commonly-used methods, especially for evaluating goodness of fit. We also demonstrate a simple time-domain noise model that accurately describes the noise amplitude in a set of repeated measurements. These techniques are broadly applicable to material parameter estimation.","PeriodicalId":6746,"journal":{"name":"2020 45th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz)","volume":"5 1","pages":"1-1"},"PeriodicalIF":0.0,"publicationDate":"2020-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74383921","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 : 2020-11-08DOI: 10.1109/IRMMW-THz46771.2020.9370477
Xiaoran Li, P. Bawuah, Bryan M. Williams, J. Zeitler, Hungyen Lin
In-line terahertz sensing has been demonstrated to measure the coating thickness of individual pharmaceutical tablets during coating operation. As coating uniformity is highly dependent on tablet mixing, this study presents our research progress to date on using in-line terahertz sensing to investigate the effects of baffle design, drum rotational speed and batch size, on tablet mixing inside a laboratory-sized perforated pan coater.
{"title":"Studying pharmaceutical tablets mixing process inside a perforated pan-coater using in-line terahertz sensing","authors":"Xiaoran Li, P. Bawuah, Bryan M. Williams, J. Zeitler, Hungyen Lin","doi":"10.1109/IRMMW-THz46771.2020.9370477","DOIUrl":"https://doi.org/10.1109/IRMMW-THz46771.2020.9370477","url":null,"abstract":"In-line terahertz sensing has been demonstrated to measure the coating thickness of individual pharmaceutical tablets during coating operation. As coating uniformity is highly dependent on tablet mixing, this study presents our research progress to date on using in-line terahertz sensing to investigate the effects of baffle design, drum rotational speed and batch size, on tablet mixing inside a laboratory-sized perforated pan coater.","PeriodicalId":6746,"journal":{"name":"2020 45th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz)","volume":"25 1","pages":"01-02"},"PeriodicalIF":0.0,"publicationDate":"2020-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74700119","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 : 2020-11-08DOI: 10.1109/IRMMW-THz46771.2020.9370525
Mirco Kutas, B. Haase, P. Bickert, Felix Riexinger, D. Molter, G. von Freymann
In quantum sensing experiments, photons in the spectral region of interest interact with a sample and their properties are transferred via biphoton-correlation to another spectral region, where widely available and highly developed detectors can be used. Especially spectral regions where the photon detection is quite difficult can benefit from this novel technique. We report on the first demonstration of quantum sensing in the terahertz frequency range, in which the terahertz photons interact with a sample in free space determining the thickness of polytetrafluoroethylene plates by only detecting visible photons [1].
{"title":"Terahertz quantum sensing with visible light","authors":"Mirco Kutas, B. Haase, P. Bickert, Felix Riexinger, D. Molter, G. von Freymann","doi":"10.1109/IRMMW-THz46771.2020.9370525","DOIUrl":"https://doi.org/10.1109/IRMMW-THz46771.2020.9370525","url":null,"abstract":"In quantum sensing experiments, photons in the spectral region of interest interact with a sample and their properties are transferred via biphoton-correlation to another spectral region, where widely available and highly developed detectors can be used. Especially spectral regions where the photon detection is quite difficult can benefit from this novel technique. We report on the first demonstration of quantum sensing in the terahertz frequency range, in which the terahertz photons interact with a sample in free space determining the thickness of polytetrafluoroethylene plates by only detecting visible photons [1].","PeriodicalId":6746,"journal":{"name":"2020 45th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz)","volume":"590 1","pages":"1-2"},"PeriodicalIF":0.0,"publicationDate":"2020-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74723156","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 : 2020-11-08DOI: 10.1109/IRMMW-THz46771.2020.9371001
N. V. van Hoof, Stan E. T. ter Huurne, J. Gómez-Rivas
Bound states in the Continuum (BICs) represent a new paradigm for resonant photonics due to their infinite lifetime associated with the full suppression of radiation losses. This property makes it also impossible to directly measure BICs with standard far-field spectroscopic techniques. Here, we directly observe the temporal evolution of a BIC by using a near-field excitation and detection microscope.
{"title":"Direct Observation of THz Bound States in the Continuum","authors":"N. V. van Hoof, Stan E. T. ter Huurne, J. Gómez-Rivas","doi":"10.1109/IRMMW-THz46771.2020.9371001","DOIUrl":"https://doi.org/10.1109/IRMMW-THz46771.2020.9371001","url":null,"abstract":"Bound states in the Continuum (BICs) represent a new paradigm for resonant photonics due to their infinite lifetime associated with the full suppression of radiation losses. This property makes it also impossible to directly measure BICs with standard far-field spectroscopic techniques. Here, we directly observe the temporal evolution of a BIC by using a near-field excitation and detection microscope.","PeriodicalId":6746,"journal":{"name":"2020 45th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz)","volume":"96 1","pages":"1-2"},"PeriodicalIF":0.0,"publicationDate":"2020-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72928484","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 : 2020-11-08DOI: 10.1109/IRMMW-THz46771.2020.9370437
Vanessa Fenlon, Michael D. Cooke, A. Gallant, C. Balocco
A genetic algorithm, coupled to a finite difference time domain simulator, is presented for the optimisation of passive THz devices. A broadband THz micropatch antenna has been designed using this system and tested using a vector network analyser in the frequency range 0.75 THz to 1.10 THz.
{"title":"Genetic Algorithms for the Design of THz Components","authors":"Vanessa Fenlon, Michael D. Cooke, A. Gallant, C. Balocco","doi":"10.1109/IRMMW-THz46771.2020.9370437","DOIUrl":"https://doi.org/10.1109/IRMMW-THz46771.2020.9370437","url":null,"abstract":"A genetic algorithm, coupled to a finite difference time domain simulator, is presented for the optimisation of passive THz devices. A broadband THz micropatch antenna has been designed using this system and tested using a vector network analyser in the frequency range 0.75 THz to 1.10 THz.","PeriodicalId":6746,"journal":{"name":"2020 45th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz)","volume":"11 1","pages":"1-2"},"PeriodicalIF":0.0,"publicationDate":"2020-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73003089","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 : 2020-11-08DOI: 10.1109/IRMMW-THz46771.2020.9370474
F. Sheikh, Yida Zhang, Yamen Zanteh, I. Mabrouk, M. Hasan, T. Kaiser
In this paper, we analyze the in-room THz wireless links across 275 GHz to 325 GHz frequency spectrum in the presence of random rough surfaces interpreting the scattering phenomenon utilizing well-known reflection models. Focus is given to random rough surfaces which can be described statistically. Taking into account the intrinsic material properties (i.e., complex permittivity), we strive to demonstrate a comparison between Rayleigh-Rice (R-R) approach and the real 3D surface topography parameters. The R-R approach approximates the surface deviations or topography of any rough material with Gaussian height distribution. The ray-tracing simulations are conducted in a realistic but simple office environment for line-of-sight (LoS) and non-line-of-sight (NLoS) conditions to study the multipath propagation with its impact on total received power and channel delay profile. To the best of the authors' knowledge, no such work has hitherto been attempted.
{"title":"A Ray Tracing Approach to the Scattering of Electromagnetic Waves from Random Rough Surfaces at Terahertz Frequencies","authors":"F. Sheikh, Yida Zhang, Yamen Zanteh, I. Mabrouk, M. Hasan, T. Kaiser","doi":"10.1109/IRMMW-THz46771.2020.9370474","DOIUrl":"https://doi.org/10.1109/IRMMW-THz46771.2020.9370474","url":null,"abstract":"In this paper, we analyze the in-room THz wireless links across 275 GHz to 325 GHz frequency spectrum in the presence of random rough surfaces interpreting the scattering phenomenon utilizing well-known reflection models. Focus is given to random rough surfaces which can be described statistically. Taking into account the intrinsic material properties (i.e., complex permittivity), we strive to demonstrate a comparison between Rayleigh-Rice (R-R) approach and the real 3D surface topography parameters. The R-R approach approximates the surface deviations or topography of any rough material with Gaussian height distribution. The ray-tracing simulations are conducted in a realistic but simple office environment for line-of-sight (LoS) and non-line-of-sight (NLoS) conditions to study the multipath propagation with its impact on total received power and channel delay profile. To the best of the authors' knowledge, no such work has hitherto been attempted.","PeriodicalId":6746,"journal":{"name":"2020 45th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz)","volume":"76 1","pages":"01-01"},"PeriodicalIF":0.0,"publicationDate":"2020-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78689669","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 : 2020-11-08DOI: 10.1109/IRMMW-THz46771.2020.9370885
A. Haky, A. Vasanelli, Y. Todorov, G. Beaudoin, K. Pantzas, I. Sagnes, C. Sirtori
Quantum engineering is used in this work to design unconventional potentials that confine collective plasmonic modes in a semiconductor. Our approach has been enabled by a fully quantum treatment, which goes well beyond commonly employed electromagnetic models as it includes size confinement and tunneling. We have experimentally observed that new mid-infrared resonances of the collective response arise in a step well.
{"title":"Quantum Engineering of Plasmon Modes","authors":"A. Haky, A. Vasanelli, Y. Todorov, G. Beaudoin, K. Pantzas, I. Sagnes, C. Sirtori","doi":"10.1109/IRMMW-THz46771.2020.9370885","DOIUrl":"https://doi.org/10.1109/IRMMW-THz46771.2020.9370885","url":null,"abstract":"Quantum engineering is used in this work to design unconventional potentials that confine collective plasmonic modes in a semiconductor. Our approach has been enabled by a fully quantum treatment, which goes well beyond commonly employed electromagnetic models as it includes size confinement and tunneling. We have experimentally observed that new mid-infrared resonances of the collective response arise in a step well.","PeriodicalId":6746,"journal":{"name":"2020 45th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz)","volume":"35 1","pages":"1-2"},"PeriodicalIF":0.0,"publicationDate":"2020-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78437557","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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