Pub Date : 2011-12-15DOI: 10.1109/IRMMW-THZ.2011.6105129
P. Kopyt, J. Marczewski, K. Kucharski, J. Lusakowski, W. Gwarek
This paper presents a design of planar antennas integrated with MOSFETs to form a THz radiation detector. The antennas have been developed on thin substrates in order to increase the detector responsivity through eliminating substrate modes responsible for electromagnetic power losses.
{"title":"Planar antennas for THz radiation detector based on a MOSFET","authors":"P. Kopyt, J. Marczewski, K. Kucharski, J. Lusakowski, W. Gwarek","doi":"10.1109/IRMMW-THZ.2011.6105129","DOIUrl":"https://doi.org/10.1109/IRMMW-THZ.2011.6105129","url":null,"abstract":"This paper presents a design of planar antennas integrated with MOSFETs to form a THz radiation detector. The antennas have been developed on thin substrates in order to increase the detector responsivity through eliminating substrate modes responsible for electromagnetic power losses.","PeriodicalId":6353,"journal":{"name":"2011 International Conference on Infrared, Millimeter, and Terahertz Waves","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2011-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85761517","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 : 2011-12-15DOI: 10.1109/IRMMW-THZ.2011.6105115
D. Phillips, Elizabeth A. Tanner, H. Everitt, F. D. De Lucia
IR/THz double resonance spectroscopy has recently been proposed as a method of chemical remote sensing with isotopic molecular recognition specificity at atmospheric pressures for distances approaching one kilometer.[1] Double resonance signatures are calculated, from which the sensitivity and hardware requirements for a double resonance remote sensing spectrometer may be estimated. The extension of this technique to heavier and more complex molecules is discussed.
{"title":"Infrared/terahertz double resonance spectroscopy remote sensing","authors":"D. Phillips, Elizabeth A. Tanner, H. Everitt, F. D. De Lucia","doi":"10.1109/IRMMW-THZ.2011.6105115","DOIUrl":"https://doi.org/10.1109/IRMMW-THZ.2011.6105115","url":null,"abstract":"IR/THz double resonance spectroscopy has recently been proposed as a method of chemical remote sensing with isotopic molecular recognition specificity at atmospheric pressures for distances approaching one kilometer.[1] Double resonance signatures are calculated, from which the sensitivity and hardware requirements for a double resonance remote sensing spectrometer may be estimated. The extension of this technique to heavier and more complex molecules is discussed.","PeriodicalId":6353,"journal":{"name":"2011 International Conference on Infrared, Millimeter, and Terahertz Waves","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2011-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83136652","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 : 2011-12-15DOI: 10.1109/IRMMW-THZ.2011.6104789
J. Melinger, Yihong Yang, Mahboubeh Mandeghar, Alisha J. Shutler, D. Grischkowsky
We describe the initial phase of a long path terahertz time-domain spectroscopy apparatus to detect THz rotational spectra of small vapor phase molecules within the atmospheric transparency windows. We discuss the measurements first for a relatively short path THz propagation path of 6.2 meters, and then for a much longer path of 170 meters.
{"title":"THz detection of small molecule vapors over long paths in the atmospheric transmission windows","authors":"J. Melinger, Yihong Yang, Mahboubeh Mandeghar, Alisha J. Shutler, D. Grischkowsky","doi":"10.1109/IRMMW-THZ.2011.6104789","DOIUrl":"https://doi.org/10.1109/IRMMW-THZ.2011.6104789","url":null,"abstract":"We describe the initial phase of a long path terahertz time-domain spectroscopy apparatus to detect THz rotational spectra of small vapor phase molecules within the atmospheric transparency windows. We discuss the measurements first for a relatively short path THz propagation path of 6.2 meters, and then for a much longer path of 170 meters.","PeriodicalId":6353,"journal":{"name":"2011 International Conference on Infrared, Millimeter, and Terahertz Waves","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2011-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82457237","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 : 2011-12-15DOI: 10.1109/IRMMW-THZ.2011.6105248
Ting Sun, Gary Woods, K. Kelly
We present IR emission images obtained from semiconductor devices using compressive sensing mathematics combined with a single-element infrared photon detector as method of defect detection. High signal to noise ratio, robust measurements and fast acquisition have make compressive imaging a strong supplement to traditional IR analysis systems.
{"title":"Compressive imaging applied to infrared-based semiconductor failure analysis","authors":"Ting Sun, Gary Woods, K. Kelly","doi":"10.1109/IRMMW-THZ.2011.6105248","DOIUrl":"https://doi.org/10.1109/IRMMW-THZ.2011.6105248","url":null,"abstract":"We present IR emission images obtained from semiconductor devices using compressive sensing mathematics combined with a single-element infrared photon detector as method of defect detection. High signal to noise ratio, robust measurements and fast acquisition have make compressive imaging a strong supplement to traditional IR analysis systems.","PeriodicalId":6353,"journal":{"name":"2011 International Conference on Infrared, Millimeter, and Terahertz Waves","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2011-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82489473","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 : 2011-12-15DOI: 10.1109/IRMMW-THZ.2011.6105191
R. Ramaswamy, K. Wang, A. Muraviev, R. Gaska, J. Yang, A. Sergeev, R. Olac-vaw, V. Mitin
Microbolometers based on two dimensional electron gas (2DEG) medium in GaN semiconductor were fabricated and characterized. Low contact resistance (below 0.5 Ω·mm) achieved in our devices ensures that the THz voltage primarily drops across the active region. Due to small electron momentum relaxation time, the inductive part of the impedance in our devices is small, so these sensors can be combined with standard antennas or waveguides. Optical transmission measurements of the GaN heterostructures indicate that the 2DEG has significant coupling to the THz radiation due to Drude absorption up to frequencies well above 3 THz (100 cm−1) caused by high electron concentration (∼1–4 × 1013 cm−2) and short momentum relaxation time (∼10−12 sec). The normalized terahertz responsivity level defined as (dJ/J)/P is estimated to be 1.2×10−2 W−1 at 1.84 THz with dR/dT of ∼3Ω/K at room temperature in our device.
{"title":"Hot electron microbolometers based on GaN heterostructures for THz applications","authors":"R. Ramaswamy, K. Wang, A. Muraviev, R. Gaska, J. Yang, A. Sergeev, R. Olac-vaw, V. Mitin","doi":"10.1109/IRMMW-THZ.2011.6105191","DOIUrl":"https://doi.org/10.1109/IRMMW-THZ.2011.6105191","url":null,"abstract":"Microbolometers based on two dimensional electron gas (2DEG) medium in GaN semiconductor were fabricated and characterized. Low contact resistance (below 0.5 Ω·mm) achieved in our devices ensures that the THz voltage primarily drops across the active region. Due to small electron momentum relaxation time, the inductive part of the impedance in our devices is small, so these sensors can be combined with standard antennas or waveguides. Optical transmission measurements of the GaN heterostructures indicate that the 2DEG has significant coupling to the THz radiation due to Drude absorption up to frequencies well above 3 THz (100 cm<sup>−1</sup>) caused by high electron concentration (∼1–4 × 10<sup>13</sup> cm<sup>−2</sup>) and short momentum relaxation time (∼10<sup>−12</sup> sec). The normalized terahertz responsivity level defined as (dJ/J)/P is estimated to be 1.2×10<sup>−2</sup> W<sup>−1</sup> at 1.84 THz with dR/dT of ∼3Ω/K at room temperature in our device.","PeriodicalId":6353,"journal":{"name":"2011 International Conference on Infrared, Millimeter, and Terahertz Waves","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2011-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84214778","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 : 2011-12-15DOI: 10.1109/IRMMW-THZ.2011.6104940
Hua Chen, Te-Hsuen Chen, Shih-Chen Fu, Wen-Jeng Lee, Tzu-Fang Tseng, Jen-Tang Lu, Y. Tsai, Yu-You Huang, E. Chuang, Yuh-Jing Hwang, Chi-Kung Sun
We performed in vivo THz-fiber-scanning transmission imaging study on a subcutaneous xenograft mouse model for early human breast cancer detection. We continuously monitored the growth of human breast cancer in mice. The in vivo study indicates the THz imaging can distinguish cancer cells from the surrounding fatty tissue with a high sensitivity.
{"title":"In vivo THz fiber-scanning mammography of early breast cancer in mice","authors":"Hua Chen, Te-Hsuen Chen, Shih-Chen Fu, Wen-Jeng Lee, Tzu-Fang Tseng, Jen-Tang Lu, Y. Tsai, Yu-You Huang, E. Chuang, Yuh-Jing Hwang, Chi-Kung Sun","doi":"10.1109/IRMMW-THZ.2011.6104940","DOIUrl":"https://doi.org/10.1109/IRMMW-THZ.2011.6104940","url":null,"abstract":"We performed in vivo THz-fiber-scanning transmission imaging study on a subcutaneous xenograft mouse model for early human breast cancer detection. We continuously monitored the growth of human breast cancer in mice. The in vivo study indicates the THz imaging can distinguish cancer cells from the surrounding fatty tissue with a high sensitivity.","PeriodicalId":6353,"journal":{"name":"2011 International Conference on Infrared, Millimeter, and Terahertz Waves","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2011-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84360976","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 : 2011-12-15DOI: 10.1109/IRMMW-THZ.2011.6105221
Xianbo Yang, J. Hejase, P. Paladhi, P. Chahal
In this paper, the use of polymer-ceramic nanocomposites in the fabrication of THz planar circuits at the wafer-level is introduced. Thin ribbon dielectric waveguides (50∼60μm) made from SU-8 — Barium Titanate (BaTiO3) composites are used in the fabrication of THz ribbon waveguides and circuits. Details of material characteristics, fabrication process and an example power splitter circuit are presented.
{"title":"Planar terahertz circuits using thin dielectric waveguides","authors":"Xianbo Yang, J. Hejase, P. Paladhi, P. Chahal","doi":"10.1109/IRMMW-THZ.2011.6105221","DOIUrl":"https://doi.org/10.1109/IRMMW-THZ.2011.6105221","url":null,"abstract":"In this paper, the use of polymer-ceramic nanocomposites in the fabrication of THz planar circuits at the wafer-level is introduced. Thin ribbon dielectric waveguides (50∼60μm) made from SU-8 — Barium Titanate (BaTiO3) composites are used in the fabrication of THz ribbon waveguides and circuits. Details of material characteristics, fabrication process and an example power splitter circuit are presented.","PeriodicalId":6353,"journal":{"name":"2011 International Conference on Infrared, Millimeter, and Terahertz Waves","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2011-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84374401","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 : 2011-12-15DOI: 10.1109/IRMMW-THZ.2011.6104770
F. Huth, M. Schnell, J. Wittborn, N. Ocelić, R. Hillenbrand
We demonstrate a FTIR system that allows for infrared-spectroscopic nano-imaging with a thermal source (nano-FTIR). Based on super-focusing of thermal radiation with an infrared antenna and strong signal enhancement using an asymmetric FTIR spectrometer, we improve the spatial resolution of conventional IR spectroscopy by 2 orders of magnitude.
{"title":"Nanoscale infrared spectroscopy with a thermal source: Nano-FTIR","authors":"F. Huth, M. Schnell, J. Wittborn, N. Ocelić, R. Hillenbrand","doi":"10.1109/IRMMW-THZ.2011.6104770","DOIUrl":"https://doi.org/10.1109/IRMMW-THZ.2011.6104770","url":null,"abstract":"We demonstrate a FTIR system that allows for infrared-spectroscopic nano-imaging with a thermal source (nano-FTIR). Based on super-focusing of thermal radiation with an infrared antenna and strong signal enhancement using an asymmetric FTIR spectrometer, we improve the spatial resolution of conventional IR spectroscopy by 2 orders of magnitude.","PeriodicalId":6353,"journal":{"name":"2011 International Conference on Infrared, Millimeter, and Terahertz Waves","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2011-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80672772","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 : 2011-12-15DOI: 10.1109/IRMMW-THZ.2011.6104960
T. Fujiwara, Y. Matsuki, K. Ueda, T. Idehara, R. Ikeda, K. Kosuga, Shinji Nakamura, M. Toda, T. Anai
A continuously frequency tunable gyrotron generated submillimeter wave at 395 GHz over a bandwidth of 1 GHz with a power of 10 W. This gyrotron enabled the optimization of high-field dynamic nuclear polarization for the sensitivity enhancement of solid-state NMR without changing the static magnetic field.
{"title":"Application of continuously frequency-tunable sub-MMW gyrotron to dynamic nuclear polarization at 14.1 T and 30 K for NMR","authors":"T. Fujiwara, Y. Matsuki, K. Ueda, T. Idehara, R. Ikeda, K. Kosuga, Shinji Nakamura, M. Toda, T. Anai","doi":"10.1109/IRMMW-THZ.2011.6104960","DOIUrl":"https://doi.org/10.1109/IRMMW-THZ.2011.6104960","url":null,"abstract":"A continuously frequency tunable gyrotron generated submillimeter wave at 395 GHz over a bandwidth of 1 GHz with a power of 10 W. This gyrotron enabled the optimization of high-field dynamic nuclear polarization for the sensitivity enhancement of solid-state NMR without changing the static magnetic field.","PeriodicalId":6353,"journal":{"name":"2011 International Conference on Infrared, Millimeter, and Terahertz Waves","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2011-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82667274","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 : 2011-12-15DOI: 10.1109/IRMMW-THZ.2011.6104797
J. Lohr, M. Blank, P. Borchard, S. Cauffman, M. Cengher, J. Doane, R. Ellis, K. Felch, Y. Gorelov, C. Moeller, S. Noraky, D. Ponce, A. Richenderfer, M. Shapiro
A major upgrade to the electron cyclotron heating complex on the DIII-D tokamak is underway. Two depressed collector gyrotrons are being added to the complex and the transmission lines are being upgraded. Transmission line efficiencies are being increased by reduction in the number of miter bends together with improved alignment resulting in improved mode purity.
{"title":"Transmission line performance and plans for the gyrotron complex on the DIII-D tokamak","authors":"J. Lohr, M. Blank, P. Borchard, S. Cauffman, M. Cengher, J. Doane, R. Ellis, K. Felch, Y. Gorelov, C. Moeller, S. Noraky, D. Ponce, A. Richenderfer, M. Shapiro","doi":"10.1109/IRMMW-THZ.2011.6104797","DOIUrl":"https://doi.org/10.1109/IRMMW-THZ.2011.6104797","url":null,"abstract":"A major upgrade to the electron cyclotron heating complex on the DIII-D tokamak is underway. Two depressed collector gyrotrons are being added to the complex and the transmission lines are being upgraded. Transmission line efficiencies are being increased by reduction in the number of miter bends together with improved alignment resulting in improved mode purity.","PeriodicalId":6353,"journal":{"name":"2011 International Conference on Infrared, Millimeter, and Terahertz Waves","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2011-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89782551","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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