{"title":"Terahertz time-domain spectroscopy using multipath gas cell for low concentration N2O and CO gases (Conference Presentation)","authors":"Tae-In Jeon","doi":"10.1117/12.2559146","DOIUrl":"https://doi.org/10.1117/12.2559146","url":null,"abstract":"","PeriodicalId":170578,"journal":{"name":"Next-Generation Spectroscopic Technologies XIII","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116745932","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}
{"title":"Investigation of fuel additives in engine oil using integrating cavity enhanced laser induced fluorescence (Conference Presentation)","authors":"T. Moore, J. Wallace, A. Swarts, Yi Xu","doi":"10.1117/12.2558828","DOIUrl":"https://doi.org/10.1117/12.2558828","url":null,"abstract":"","PeriodicalId":170578,"journal":{"name":"Next-Generation Spectroscopic Technologies XIII","volume":"53 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117056365","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}
L. Sterczewski, M. Bagheri, C. Frez, C. Canedy, I. Vurgaftman, Mijin Kim, C. Kim, C. Merritt, W. Bewley, J. Meyer, C. Teng, G. Wysocki
By exploiting the bi-functional operation capability of interband cascade laser (ICL) frequency combs, we have utilized the laser medium not only for comb generation, but also as a room-temperature photodetector with near-GHz bandwidth for multi-heterodyne beating of the comb lines. Our self-contained platform consuming less than 2 W of electrical power enables free-running room-temperature broadband dual-comb spectroscopy of 1,1 difluoroethane with ~3% standard deviation in 2 ms over 600 GHz of optical bandwidth around 3.6 µm. We will discuss progress toward the optimization of ICL combs for realizing compact, low-power chemical sensors operating in the MWIR.
{"title":"Interband cascade laser frequency combs for spectroscopic sensing (Conference Presentation)","authors":"L. Sterczewski, M. Bagheri, C. Frez, C. Canedy, I. Vurgaftman, Mijin Kim, C. Kim, C. Merritt, W. Bewley, J. Meyer, C. Teng, G. Wysocki","doi":"10.1117/12.2559308","DOIUrl":"https://doi.org/10.1117/12.2559308","url":null,"abstract":"By exploiting the bi-functional operation capability of interband cascade laser (ICL) frequency combs, we have utilized the laser medium not only for comb generation, but also as a room-temperature photodetector with near-GHz bandwidth for multi-heterodyne beating of the comb lines. Our self-contained platform consuming less than 2 W of electrical power enables free-running room-temperature broadband dual-comb spectroscopy of 1,1 difluoroethane with ~3% standard deviation in 2 ms over 600 GHz of optical bandwidth around 3.6 µm. We will discuss progress toward the optimization of ICL combs for realizing compact, low-power chemical sensors operating in the MWIR.","PeriodicalId":170578,"journal":{"name":"Next-Generation Spectroscopic Technologies XIII","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116264449","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}
T. Huffman, R. Furstenberg, C. Kendziora, R. McGill
Optically Super-resolved InfraRed Imaging micro-Spectroscopy (OSIRIS) permits the collection of fully broadband hyperspectral images at the maximum optical spatial resolution. Modulated long wavelength light is directed onto the sample, while a short wavelength probe beam senses the resultant modulation in local temperature. Thus, OSIRIS constitutes the full generalization of color vision to full spectral bandwidth with spatial resolutions up to the maximum achievable with far-field optics (λprobe/4NA). The non-contact nature of OSIRIS permits deep tomography and real-time imaging, while preserving the versatility and ease of use of optical microscopy.
{"title":"Optically super-resolved infrared imaging micro-spectroscopy (Conference Presentation)","authors":"T. Huffman, R. Furstenberg, C. Kendziora, R. McGill","doi":"10.1117/12.2558825","DOIUrl":"https://doi.org/10.1117/12.2558825","url":null,"abstract":"Optically Super-resolved InfraRed Imaging micro-Spectroscopy (OSIRIS) permits the collection of fully broadband hyperspectral images at the maximum optical spatial resolution. Modulated long wavelength light is directed onto the sample, while a short wavelength probe beam senses the resultant modulation in local temperature. Thus, OSIRIS constitutes the full generalization of color vision to full spectral bandwidth with spatial resolutions up to the maximum achievable with far-field optics (λprobe/4NA). The non-contact nature of OSIRIS permits deep tomography and real-time imaging, while preserving the versatility and ease of use of optical microscopy.","PeriodicalId":170578,"journal":{"name":"Next-Generation Spectroscopic Technologies XIII","volume":"01 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127280534","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}
We present our systematic experimental study on the responsivity to THz wave and the noise in the photoconductive antennas made on low-temperature-grown (LTG) GaAs. In particular, we show that both depend on the properties of the LTG GaAs and the type of the metallization. On the basis of the results, we will discuss a device model in a manner independent of the details of the device fabrication to facilitate the standardized description.
{"title":"Impact of electrical contact between electrode metal and low-temperature-grown GaAs on the signal and noise of photoconductive antennas for THz wave detection (Conference Presentation)","authors":"Y. Kadoya","doi":"10.1117/12.2557652","DOIUrl":"https://doi.org/10.1117/12.2557652","url":null,"abstract":"We present our systematic experimental study on the responsivity to THz wave and the noise in the photoconductive antennas made on low-temperature-grown (LTG) GaAs. In particular, we show that both depend on the properties of the LTG GaAs and the type of the metallization. On the basis of the results, we will discuss a device model in a manner independent of the details of the device fabrication to facilitate the standardized description.","PeriodicalId":170578,"journal":{"name":"Next-Generation Spectroscopic Technologies XIII","volume":"123 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131605572","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}
MXenes are 2D transition metal carbides and nitrides with electronic properties that can be tuned by their chemistry and structure. Three members of MXene family, Ti3C2Tz , Mo2Ti2C3Tz and Mo2TiC2Tz are all intrinsically metallic, with high free carrier densities and high carrier mobility within individual nanosheets. However, they respond to photoexcitation in dramatically different ways: while photoexcitation suppresses conductivity in Ti3C2Tz, it results in a long-lived positive photoconductivity in both Mo2Ti2C3Tz and Mo2TiC2Tz. Those responses suggest applications of MXenes in a variety of electro-optical and THz devices.
{"title":"2D MXenes: Promise for applications ranging from THz electromagnetic interference shielding to conductive electrodes (Conference Presentation)","authors":"L. Titova","doi":"10.1117/12.2559149","DOIUrl":"https://doi.org/10.1117/12.2559149","url":null,"abstract":"MXenes are 2D transition metal carbides and nitrides with electronic properties that can be tuned by their chemistry and structure. Three members of MXene family, Ti3C2Tz , Mo2Ti2C3Tz and Mo2TiC2Tz are all intrinsically metallic, with high free carrier densities and high carrier mobility within individual nanosheets. However, they respond to photoexcitation in dramatically different ways: while photoexcitation suppresses conductivity in Ti3C2Tz, it results in a long-lived positive photoconductivity in both Mo2Ti2C3Tz and Mo2TiC2Tz. Those responses suggest applications of MXenes in a variety of electro-optical and THz devices.","PeriodicalId":170578,"journal":{"name":"Next-Generation Spectroscopic Technologies XIII","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126464628","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}
A. Tasolamprou, A. Koulouklidis, G. Kenanakis, C. Daskalaki, S. Tzortzakis, Charalampros Mavidis, G. Deligiorgis, Z. Viskadourakis, P. Kuzhir, M. Kafesaki, E. Economou, C. Soukoulis
We discuss the unique possibilities stemming from exploiting the exotic properties of artificial metasurfaces designed for operation in the THz regime. We mainly focus on graphene based metasurfaces acting as modulators for the THz regime. Graphene exhibits unique optical properties particularly in the THz spectrum, where it predominantly exhibits a Drude-like response. Here we present that ultrafast modulation response in a graphene thin film absorber which can be assessed with use of a broadband THz time-domain-spectroscopic system (THz-TDS) in an IR pump-THz probe configuration. The simple scheme of the absorber can be used as a platform for ultrafast flat optics and metasurfaces.
{"title":"A platform for ultrafast control in THz graphene-based metasurfaces","authors":"A. Tasolamprou, A. Koulouklidis, G. Kenanakis, C. Daskalaki, S. Tzortzakis, Charalampros Mavidis, G. Deligiorgis, Z. Viskadourakis, P. Kuzhir, M. Kafesaki, E. Economou, C. Soukoulis","doi":"10.1117/12.2559377","DOIUrl":"https://doi.org/10.1117/12.2559377","url":null,"abstract":"We discuss the unique possibilities stemming from exploiting the exotic properties of artificial metasurfaces designed for operation in the THz regime. We mainly focus on graphene based metasurfaces acting as modulators for the THz regime. Graphene exhibits unique optical properties particularly in the THz spectrum, where it predominantly exhibits a Drude-like response. Here we present that ultrafast modulation response in a graphene thin film absorber which can be assessed with use of a broadband THz time-domain-spectroscopic system (THz-TDS) in an IR pump-THz probe configuration. The simple scheme of the absorber can be used as a platform for ultrafast flat optics and metasurfaces.","PeriodicalId":170578,"journal":{"name":"Next-Generation Spectroscopic Technologies XIII","volume":"57 2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116515439","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}
Sidharth Sharma, Supankar Das, Harry Garg, Satbir Singh, Amitava Das
The physical and chemical quality of lubricating engine oil in the IC engine must be tracked regularly to obtain optimum execution and maintain an engine life and carbon footprint. Routine condition monitoring of engine oil requires costly research testing facility by highly skilled investigators. Various methods can check the concentration of the impurities in engine oil, but some drawbacks exist in already existing methods. An optical fiber-based photon measurement method is utilized in this paper. Our work presents the implementation of optical fiber with white light (WL) based spectrophotometer for continuous monitoring of degradation in engine oil. The optical absorbance of photons in engine oil relating to impurities is estimated by utilizing a photodetector sensor. Experimental results show the designed device provides a trustworthy method of detecting the sludge level in engine oil. Therefore, developed spectrophotometer has potential value in engine oil quality monitoring.
{"title":"Development of a low cost dipstick type optical fiber based portable spectrophotometer for on-line monitoring of adulteration level in engine oil (Conference Presentation)","authors":"Sidharth Sharma, Supankar Das, Harry Garg, Satbir Singh, Amitava Das","doi":"10.1117/12.2554012","DOIUrl":"https://doi.org/10.1117/12.2554012","url":null,"abstract":"The physical and chemical quality of lubricating engine oil in the IC engine must be tracked regularly to obtain optimum execution and maintain an engine life and carbon footprint. Routine condition monitoring of engine oil requires costly research testing facility by highly skilled investigators. Various methods can check the concentration of the impurities in engine oil, but some drawbacks exist in already existing methods. An optical fiber-based photon measurement method is utilized in this paper. Our work presents the implementation of optical fiber with white light (WL) based spectrophotometer for continuous monitoring of degradation in engine oil. The optical absorbance of photons in engine oil relating to impurities is estimated by utilizing a photodetector sensor. Experimental results show the designed device provides a trustworthy method of detecting the sludge level in engine oil. Therefore, developed spectrophotometer has potential value in engine oil quality monitoring.","PeriodicalId":170578,"journal":{"name":"Next-Generation Spectroscopic Technologies XIII","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122756647","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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