Pub Date : 2019-09-01DOI: 10.1109/IRMMW-THz.2019.8874564
H. Bark, I. Baek, K. Jang, Y. Jeong, Tae-In Jeon
We reported the first on the terahertz (THz) transmission characteristics of a guided-mode resonance (GMR) filter made of all-dielectric materials. The measured resonances can be explained by diffraction form the grating surface of the GMR filter, and by guiding along the inside of the filter. The designed GMR filters have a high Q-factor [1], tunable filter [2], and sensor [3]. It is working depend on refractive index, THz beam incident angle, polarization, GMR filter groves periods, and thickness of GMR core. These GMR filters of experimental results were in good agreement with simulation results.
{"title":"All-dielectric Guided-mode resonance filters in THz region","authors":"H. Bark, I. Baek, K. Jang, Y. Jeong, Tae-In Jeon","doi":"10.1109/IRMMW-THz.2019.8874564","DOIUrl":"https://doi.org/10.1109/IRMMW-THz.2019.8874564","url":null,"abstract":"We reported the first on the terahertz (THz) transmission characteristics of a guided-mode resonance (GMR) filter made of all-dielectric materials. The measured resonances can be explained by diffraction form the grating surface of the GMR filter, and by guiding along the inside of the filter. The designed GMR filters have a high Q-factor [1], tunable filter [2], and sensor [3]. It is working depend on refractive index, THz beam incident angle, polarization, GMR filter groves periods, and thickness of GMR core. These GMR filters of experimental results were in good agreement with simulation results.","PeriodicalId":6686,"journal":{"name":"2019 44th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz)","volume":"68 1","pages":"1-2"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90680593","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 : 2019-09-01DOI: 10.1109/IRMMW-THz.2019.8874381
A. Kazakov, A. Galeeva, A. Artamkin, S. A. Dvoretskiy, N. Mikhailov, M. I. Bannikov, S. Danilov, L. Ryabova, D. Khokhlov
We present results on non-local terahertz photoconductivity in Hg1-xCdxTe thick epitaxial films with the inverted energy spectrum $(mathrm{x}lt sim 0.16)$. We show that the phototransport features observed in magnetic field indicate realization of the nonlocal electron transport regime, which is inherent to 2D topological insulators. We discuss the results in terms of a qualitative model that takes into account coexistence of the bulk transport and boundary conductive channels.
{"title":"Nonlocal Photoresponse in Epitaxial Hg1-xCdxTe films with the inverted band structure","authors":"A. Kazakov, A. Galeeva, A. Artamkin, S. A. Dvoretskiy, N. Mikhailov, M. I. Bannikov, S. Danilov, L. Ryabova, D. Khokhlov","doi":"10.1109/IRMMW-THz.2019.8874381","DOIUrl":"https://doi.org/10.1109/IRMMW-THz.2019.8874381","url":null,"abstract":"We present results on non-local terahertz photoconductivity in Hg1-xCdxTe thick epitaxial films with the inverted energy spectrum $(mathrm{x}lt sim 0.16)$. We show that the phototransport features observed in magnetic field indicate realization of the nonlocal electron transport regime, which is inherent to 2D topological insulators. We discuss the results in terms of a qualitative model that takes into account coexistence of the bulk transport and boundary conductive channels.","PeriodicalId":6686,"journal":{"name":"2019 44th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz)","volume":"132 1","pages":"1-2"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89903923","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 : 2019-09-01DOI: 10.1109/IRMMW-THz.2019.8873911
Olvera Anuar D.J. Fernandez, Andrés Betancur, C. Dios, S. Preu, P. Acedo
An absolute-frequency terahertz (THz) dual-comb system was implemented using only standard telecom components, such as continuous-wave (CW) single mode lasers, optical modulators, and erbium-doped fiber amplifiers (EDFAs) for driving a pair of ErAs:In(Al)GaAs photoconductors. The dualcomb center frequency was tuned between 0.09596 and 0.49596 THz while the mode spacing was kept at 0.5 GHz, although any other lower frequency was also possible.
{"title":"Continuous-Wave Electro-Optic Terahertz Dual-Comb Operating from 0.096 to 0.496 THz Using ErAs:In(Al)GaAs Photoconductors","authors":"Olvera Anuar D.J. Fernandez, Andrés Betancur, C. Dios, S. Preu, P. Acedo","doi":"10.1109/IRMMW-THz.2019.8873911","DOIUrl":"https://doi.org/10.1109/IRMMW-THz.2019.8873911","url":null,"abstract":"An absolute-frequency terahertz (THz) dual-comb system was implemented using only standard telecom components, such as continuous-wave (CW) single mode lasers, optical modulators, and erbium-doped fiber amplifiers (EDFAs) for driving a pair of ErAs:In(Al)GaAs photoconductors. The dualcomb center frequency was tuned between 0.09596 and 0.49596 THz while the mode spacing was kept at 0.5 GHz, although any other lower frequency was also possible.","PeriodicalId":6686,"journal":{"name":"2019 44th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz)","volume":"2 1","pages":"1-3"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89933300","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 : 2019-09-01DOI: 10.1109/IRMMW-THz.2019.8873738
E. Zhukova, B. Gorshunov, A. Azarevich, Alexey V. Bogach, V. Filipov, N. Shitsevalova, G. Komandin, A. Muratov, Y. Aleshchenko, N. Sluchanko
First detailed measurements of terahertz-infrared electrodynamic response of high-quality single-crystalline Tm0.19 Yb0.81 B12 dodecaboride with dynamic charge stripes are performed at temperatures 5–300 K. Dramatic temperature changes in the dynamic conductivity spectra are observed, single-particle and collective excitations identified and their origin is discussed in terms of metal-insulator transition.
{"title":"Terahertz-Infrared Spectroscopy of Tm0.19 Yb0.81 B12 Dodecaboride","authors":"E. Zhukova, B. Gorshunov, A. Azarevich, Alexey V. Bogach, V. Filipov, N. Shitsevalova, G. Komandin, A. Muratov, Y. Aleshchenko, N. Sluchanko","doi":"10.1109/IRMMW-THz.2019.8873738","DOIUrl":"https://doi.org/10.1109/IRMMW-THz.2019.8873738","url":null,"abstract":"First detailed measurements of terahertz-infrared electrodynamic response of high-quality single-crystalline Tm0.19 Yb0.81 B12 dodecaboride with dynamic charge stripes are performed at temperatures 5–300 K. Dramatic temperature changes in the dynamic conductivity spectra are observed, single-particle and collective excitations identified and their origin is discussed in terms of metal-insulator transition.","PeriodicalId":6686,"journal":{"name":"2019 44th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz)","volume":"50 1","pages":"1-2"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90936986","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 : 2019-09-01DOI: 10.1109/irmmw-thz.2019.8873892
A. Cavalleri
HIGH intensity pulses of TeraHertz radiation have been extensively used by our group to drive quantum solids, revealing a number of non-equilibrium physical phenomena, and switching between different stable phases and sometimes revealing hidden states not observed at equilibrium. Examples include rectification 1,2, harmonic generation and parametric amplification3 of optical phonons4, the optical enhancement of superconducting coherence 5,6, switching of ferroelectricity 7,8, of magnetic order 9,10and metal insulator transitions11.
{"title":"TeraHertz Josephson Plasmonics: Controlling Supercurrents in Cuprates","authors":"A. Cavalleri","doi":"10.1109/irmmw-thz.2019.8873892","DOIUrl":"https://doi.org/10.1109/irmmw-thz.2019.8873892","url":null,"abstract":"HIGH intensity pulses of TeraHertz radiation have been extensively used by our group to drive quantum solids, revealing a number of non-equilibrium physical phenomena, and switching between different stable phases and sometimes revealing hidden states not observed at equilibrium. Examples include rectification <sup>1,2</sup>, harmonic generation and parametric amplification<sup>3</sup> of optical phonons<sup>4</sup>, the optical enhancement of superconducting coherence <sup>5,6</sup>, switching of ferroelectricity <sup>7,8</sup>, of magnetic order <sup>9,10</sup>and metal insulator transitions<sup>11</sup>.","PeriodicalId":6686,"journal":{"name":"2019 44th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz)","volume":"26 1","pages":"1-1"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89581322","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 : 2019-09-01DOI: 10.1109/IRMMW-THz.2019.8873954
T. Olariu, M. Beck, J. Faist, G. Scalari
A method for obtaining the dispersion of terahertz (THz) quantum cascade lasers (QCL) is presented. By measuring the relative phase of the center burst and first satellite peak within the interferogram of a sub-threshold THz QCL emitting cavity inside a Fourier Transform Infrared Spectrometer (FTIR), the electroluminescence spectrum is determined by Fourier Transform and the group velocity dispersion can be calculated. This method is applicable to any QCL – here shown for Fabry-Pérot (FP) ridge laser as well as VECSEL.
提出了一种获得太赫兹量子级联激光器色散的方法。通过在傅里叶变换红外光谱仪(FTIR)内测量亚阈值太赫兹QCL发射腔干涉图中中心爆发和第一卫星峰的相对相位，通过傅里叶变换确定电致发光光谱，并计算出群速度色散。这种方法适用于任何QCL -这里显示的法布里- p (FP)脊激光器以及VECSEL。
{"title":"Dispersion measurements of Terahertz Quantum Cascade Fabry-Pérot cavities and VECSELs","authors":"T. Olariu, M. Beck, J. Faist, G. Scalari","doi":"10.1109/IRMMW-THz.2019.8873954","DOIUrl":"https://doi.org/10.1109/IRMMW-THz.2019.8873954","url":null,"abstract":"A method for obtaining the dispersion of terahertz (THz) quantum cascade lasers (QCL) is presented. By measuring the relative phase of the center burst and first satellite peak within the interferogram of a sub-threshold THz QCL emitting cavity inside a Fourier Transform Infrared Spectrometer (FTIR), the electroluminescence spectrum is determined by Fourier Transform and the group velocity dispersion can be calculated. This method is applicable to any QCL – here shown for Fabry-Pérot (FP) ridge laser as well as VECSEL.","PeriodicalId":6686,"journal":{"name":"2019 44th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz)","volume":"1 1","pages":"1-2"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89588910","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 : 2019-09-01DOI: 10.1109/IRMMW-THz.2019.8874186
E. Titova, A. Bylinkin, V. Mikheev, M. Kashchenko, D. Svintsov
We experimentally study the gate-tunable terahertz plasmon resonance in large area grating-coupled CVD graphene. Despite moderate carrier mobility in CVD graphene (~103 cm2/V/s), the resonance is clearly distinguishable above the Drude absorption background in the 5-10 THz range. The optical scattering time governing the quality factor of plasmon resonance appears to be well above the dc relaxation time. We confirm this relation by simultaneous THz transmission and field-effect measurements. We also show that the presence of the grating coupler in close proximity to graphene modifies the plasmon spectra. The plasmon field becomes tightly bound below the metal stripes, while the frequency depends on the stripe length but not by grating period.
{"title":"Terahertz plasmon resonance absorption in CVD graphene for photodetection applications","authors":"E. Titova, A. Bylinkin, V. Mikheev, M. Kashchenko, D. Svintsov","doi":"10.1109/IRMMW-THz.2019.8874186","DOIUrl":"https://doi.org/10.1109/IRMMW-THz.2019.8874186","url":null,"abstract":"We experimentally study the gate-tunable terahertz plasmon resonance in large area grating-coupled CVD graphene. Despite moderate carrier mobility in CVD graphene (~103 cm2/V/s), the resonance is clearly distinguishable above the Drude absorption background in the 5-10 THz range. The optical scattering time governing the quality factor of plasmon resonance appears to be well above the dc relaxation time. We confirm this relation by simultaneous THz transmission and field-effect measurements. We also show that the presence of the grating coupler in close proximity to graphene modifies the plasmon spectra. The plasmon field becomes tightly bound below the metal stripes, while the frequency depends on the stripe length but not by grating period.","PeriodicalId":6686,"journal":{"name":"2019 44th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz)","volume":"13 1","pages":"1-2"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89700475","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 : 2019-09-01DOI: 10.1109/IRMMW-THz.2019.8873820
Lanyue Qi, X. Niu, Jinhao Li, Jianwei Liu
In this paper, the research of W-band TE62 coaxial mode generator is studied in detail, and the purity of the mode is improved by selecting a complex coaxial cavity. In order to improve the ability to suppress the unwanted mode, the optimized three-stage smooth coaxial cavity has been used. based on the method of the surface impedance matching theory, the resonant cavity was designed and optimized using the code writing by MATLAB program. Finally, the commercial electromagnetic simulation software is used for verification. The simulation result shows that the purity of the mode exciter is 96.80resonant frequency is 94.12 GHz.
{"title":"Research and Design of W-Band Waveguide Mode Generator","authors":"Lanyue Qi, X. Niu, Jinhao Li, Jianwei Liu","doi":"10.1109/IRMMW-THz.2019.8873820","DOIUrl":"https://doi.org/10.1109/IRMMW-THz.2019.8873820","url":null,"abstract":"In this paper, the research of W-band TE62 coaxial mode generator is studied in detail, and the purity of the mode is improved by selecting a complex coaxial cavity. In order to improve the ability to suppress the unwanted mode, the optimized three-stage smooth coaxial cavity has been used. based on the method of the surface impedance matching theory, the resonant cavity was designed and optimized using the code writing by MATLAB program. Finally, the commercial electromagnetic simulation software is used for verification. The simulation result shows that the purity of the mode exciter is 96.80resonant frequency is 94.12 GHz.","PeriodicalId":6686,"journal":{"name":"2019 44th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz)","volume":"24 1","pages":"1-2"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73489829","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 : 2019-09-01DOI: 10.1109/IRMMW-THz.2019.8873934
M. Karaliūnas, Ignas Dapšys, A. Urbanowicz, G. Vektaris, A. Vektarienė, D. Bražinskienė, S. Asadauskas, I. Kašalynas, G. Valušis
Terahertz (THz) spectroscopy is a very promising and practical method for rapid and reliable food quality inspection. However, the issues related to water absorption, scattering of the medium and unambiguous detection of extremely small concentration of contaminants need to be overcome. This work show the capabilities of THz time domain spectroscopy to identify the contaminated and adulterated foods. The performance of this technique is studied on edible oils, caffeine containing foods and consumable plant leaves.
{"title":"Inspection of oils, caffeine containing foods and consumable plant leaves by time-domain THz spectroscopy","authors":"M. Karaliūnas, Ignas Dapšys, A. Urbanowicz, G. Vektaris, A. Vektarienė, D. Bražinskienė, S. Asadauskas, I. Kašalynas, G. Valušis","doi":"10.1109/IRMMW-THz.2019.8873934","DOIUrl":"https://doi.org/10.1109/IRMMW-THz.2019.8873934","url":null,"abstract":"Terahertz (THz) spectroscopy is a very promising and practical method for rapid and reliable food quality inspection. However, the issues related to water absorption, scattering of the medium and unambiguous detection of extremely small concentration of contaminants need to be overcome. This work show the capabilities of THz time domain spectroscopy to identify the contaminated and adulterated foods. The performance of this technique is studied on edible oils, caffeine containing foods and consumable plant leaves.","PeriodicalId":6686,"journal":{"name":"2019 44th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz)","volume":"5 1","pages":"1-2"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76563497","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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