Pub Date : 2021-09-01DOI: 10.1109/SDG.2009.5071325
G. Cheung, A. Sahai, M. Billia, P. Dasgupta
{"title":"Title page","authors":"G. Cheung, A. Sahai, M. Billia, P. Dasgupta","doi":"10.1109/SDG.2009.5071325","DOIUrl":"https://doi.org/10.1109/SDG.2009.5071325","url":null,"abstract":"","PeriodicalId":125701,"journal":{"name":"2014 Fotonica AEIT Italian Conference on Photonics Technologies","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115538004","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 : 2014-05-29DOI: 10.1109/METROAEROSPACE.2014.6866000
M. Iuzzolino, A. Tozzi, E. Oliva, N. Sanna, F. Massi, G. Falcini, M. Sozzi
The problem of modal noise is often encountered in high resolution spectrograph and in high speed communication fiber links. The experimental approach proved to be a deep mean of investigation of this problem, and it is a good starting point to try to understand and attenuate this source of noise. Through the observation of the spectrum image of known light source, and the comparison between a set of spectrum images, the modal noise has been clearly highlighted.
{"title":"Investigation on modal noise in ZBLAN fiber","authors":"M. Iuzzolino, A. Tozzi, E. Oliva, N. Sanna, F. Massi, G. Falcini, M. Sozzi","doi":"10.1109/METROAEROSPACE.2014.6866000","DOIUrl":"https://doi.org/10.1109/METROAEROSPACE.2014.6866000","url":null,"abstract":"The problem of modal noise is often encountered in high resolution spectrograph and in high speed communication fiber links. The experimental approach proved to be a deep mean of investigation of this problem, and it is a good starting point to try to understand and attenuate this source of noise. Through the observation of the spectrum image of known light source, and the comparison between a set of spectrum images, the modal noise has been clearly highlighted.","PeriodicalId":125701,"journal":{"name":"2014 Fotonica AEIT Italian Conference on Photonics Technologies","volume":"240 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123100131","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 : 2014-05-12DOI: 10.1109/FOTONICA.2014.6843953
J. Politi, P. Dardano, M. Iodice, I. Rea, L. de Stefano
Porous silicon (PSi) is interesting optical transducer in biosensors development. PSi can interact with biological and chemical species which penetrate inside the pores after a proper functionalization with specific bioprobes, producing a selective optical readout. In this work, we reported a functionalization approach to develop optical biosensors for heavy metal detection. Oligopeptides, namely Phytochelatins, were selected as bioprobes due to their ability to chelate heavy metal ions. Spectroscopic reflectometry and Fourier transform infrared spectroscopy were used as characterization techniques. Data show successful and repeatable functionalization process. These results are very good starting step in development of heavy metal ions optical biosensors.
{"title":"Nanostructured photonic biosensor for heavy metal detection design and development of porous silicon optical biosensors","authors":"J. Politi, P. Dardano, M. Iodice, I. Rea, L. de Stefano","doi":"10.1109/FOTONICA.2014.6843953","DOIUrl":"https://doi.org/10.1109/FOTONICA.2014.6843953","url":null,"abstract":"Porous silicon (PSi) is interesting optical transducer in biosensors development. PSi can interact with biological and chemical species which penetrate inside the pores after a proper functionalization with specific bioprobes, producing a selective optical readout. In this work, we reported a functionalization approach to develop optical biosensors for heavy metal detection. Oligopeptides, namely Phytochelatins, were selected as bioprobes due to their ability to chelate heavy metal ions. Spectroscopic reflectometry and Fourier transform infrared spectroscopy were used as characterization techniques. Data show successful and repeatable functionalization process. These results are very good starting step in development of heavy metal ions optical biosensors.","PeriodicalId":125701,"journal":{"name":"2014 Fotonica AEIT Italian Conference on Photonics Technologies","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115114980","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 : 2014-05-12DOI: 10.1109/FOTONICA.2014.6843911
P. Sansoni, D. Fontani, F. Francini, L. Mercatelli, D. Jafrancesco, E. Sani
Linear parabolic collectors usually need profilometric control since the reflector surface can be imperfectly manufactured. Optical profile assessment is generally addressed to detect small localised defects. The paper proposes two optical devices that were developed simulating profile measurements on linear parabolic mirrors. Solar troughs are employed in thermal plants and concentrating photovoltaic systems. The profilometer examines the reflector surface operating on a plane transversal to the linear axis of the trough collector. Then the detection is repeated displacing the optical device along the linear collector axis. The first profilometer includes a source of parallel rays and a target placed at the collector focal distance. The second profilometer has a fixed target and a linear source, which is approximately located in the focal position of the solar mirror. Ray-tracing simulations and practical tests are illustrated for both optical devices.
{"title":"Profile control on solar parabolic troughs","authors":"P. Sansoni, D. Fontani, F. Francini, L. Mercatelli, D. Jafrancesco, E. Sani","doi":"10.1109/FOTONICA.2014.6843911","DOIUrl":"https://doi.org/10.1109/FOTONICA.2014.6843911","url":null,"abstract":"Linear parabolic collectors usually need profilometric control since the reflector surface can be imperfectly manufactured. Optical profile assessment is generally addressed to detect small localised defects. The paper proposes two optical devices that were developed simulating profile measurements on linear parabolic mirrors. Solar troughs are employed in thermal plants and concentrating photovoltaic systems. The profilometer examines the reflector surface operating on a plane transversal to the linear axis of the trough collector. Then the detection is repeated displacing the optical device along the linear collector axis. The first profilometer includes a source of parallel rays and a target placed at the collector focal distance. The second profilometer has a fixed target and a linear source, which is approximately located in the focal position of the solar mirror. Ray-tracing simulations and practical tests are illustrated for both optical devices.","PeriodicalId":125701,"journal":{"name":"2014 Fotonica AEIT Italian Conference on Photonics Technologies","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124394000","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 : 2014-05-12DOI: 10.1109/FOTONICA.2014.6843975
P. Dardano, M. Ferrara, L. de Stefano, G. Coppola, I. Rea, E. De Tommasi, I. Rendina
In this work, we present a patented procedure that generates three dimensional (3D) image of a microscopic object with high definition, obtained by merging Scanning Electron Microscopy (SEM) and Digital Holography Microscopy (DHM) data. A high spatial resolution (up to rz=λ/20, ryx≅100nm) 3D model of the object is generated starting from two digital images, acquired separately, following standard characterization procedures. Then, the two set of data are combined using an original mathematical algorithm, which has been implemented with a commercially available software. The developed methodology is of broad interest and has been applied to elements of biological interest, in order to prove its features.
{"title":"Three-dimensional imaging using digital holography and scanning electron microscopy","authors":"P. Dardano, M. Ferrara, L. de Stefano, G. Coppola, I. Rea, E. De Tommasi, I. Rendina","doi":"10.1109/FOTONICA.2014.6843975","DOIUrl":"https://doi.org/10.1109/FOTONICA.2014.6843975","url":null,"abstract":"In this work, we present a patented procedure that generates three dimensional (3D) image of a microscopic object with high definition, obtained by merging Scanning Electron Microscopy (SEM) and Digital Holography Microscopy (DHM) data. A high spatial resolution (up to rz=λ/20, ryx≅100nm) 3D model of the object is generated starting from two digital images, acquired separately, following standard characterization procedures. Then, the two set of data are combined using an original mathematical algorithm, which has been implemented with a commercially available software. The developed methodology is of broad interest and has been applied to elements of biological interest, in order to prove its features.","PeriodicalId":125701,"journal":{"name":"2014 Fotonica AEIT Italian Conference on Photonics Technologies","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125890957","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 : 2014-05-12DOI: 10.1109/FOTONICA.2014.6843860
M. Masruri, A. Cucinotta, S. Selleri, L. Vincetti
The development of low loss, broadband, small size and flexible waveguides has become a key issue in terahertz (THz) research due to the poor characteristics of both dielectrics and metals in this frequency range. Hollow core circular tube lattice fibers (HC-CTLFs) have been recently proposed and experimentally demonstrated to match many of these conditions. They are composed of a hollow core surrounded by a circular arrangement of dielectric tubes. CTLFs guide via Inhibited Coupling (IC) which doesn't rely on photonic bandgap and the confinement depends on a strong reduction of the coupling between core modes and cladding modes. The losses in CTLF can be divided into the confinement loss and the absorption loss. Both of them can be reduced by enlarging the fiber core size, but this makes the fiber big and hardly flexible. For an optimized design of the fiber, scaling law analysis plays an important role in determining the best trade-off between low loss and small size. Here the dependence of the confinement and absorption loss on frequency and core radius are numerically investigated. Results show that confinement loss exhibits a stronger dependence of core size and frequency with respect to other hollow core fibers proposed for THz waveguiding such as Kagome, Bragg, and Tube fibers as well as to dielectric absorption loss.
{"title":"Circular Tube lattice fibers for terahertz applications","authors":"M. Masruri, A. Cucinotta, S. Selleri, L. Vincetti","doi":"10.1109/FOTONICA.2014.6843860","DOIUrl":"https://doi.org/10.1109/FOTONICA.2014.6843860","url":null,"abstract":"The development of low loss, broadband, small size and flexible waveguides has become a key issue in terahertz (THz) research due to the poor characteristics of both dielectrics and metals in this frequency range. Hollow core circular tube lattice fibers (HC-CTLFs) have been recently proposed and experimentally demonstrated to match many of these conditions. They are composed of a hollow core surrounded by a circular arrangement of dielectric tubes. CTLFs guide via Inhibited Coupling (IC) which doesn't rely on photonic bandgap and the confinement depends on a strong reduction of the coupling between core modes and cladding modes. The losses in CTLF can be divided into the confinement loss and the absorption loss. Both of them can be reduced by enlarging the fiber core size, but this makes the fiber big and hardly flexible. For an optimized design of the fiber, scaling law analysis plays an important role in determining the best trade-off between low loss and small size. Here the dependence of the confinement and absorption loss on frequency and core radius are numerically investigated. Results show that confinement loss exhibits a stronger dependence of core size and frequency with respect to other hollow core fibers proposed for THz waveguiding such as Kagome, Bragg, and Tube fibers as well as to dielectric absorption loss.","PeriodicalId":125701,"journal":{"name":"2014 Fotonica AEIT Italian Conference on Photonics Technologies","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117009424","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 : 2014-05-12DOI: 10.1109/FOTONICA.2014.6843940
P. Morvillo, R. Diana, R. Ricciardi, E. Bobeico, C. Minarini
The architecture of a polymer solar cell plays a crucial role on its stability because some of the materials used to build the device can suffer from degradation when exposed to air and/or oxygen. In this work we made a comparative study between the standard and the inverted polymer solar cells based on the bulk-heterojunction structure. We realized standard and inverted polymer solar cells using a blend film of poly[(4,8-bis-(2-ethylhexyloxy)-benzo[1,2-b;4,5-b']dithiophene)-2,6-diyl-alt-(4-(2-ethylhexanoyl)-thieno[3,4-b]thiopene)-2,6-diyl] / [6,6]-phenyl C71 butyric acid methyl ester (PBDTTT-C:[70]PCBM) blend films. In the standard architecture, the transparent indium tin oxide (ITO) electrode is coated with poly-(3,4-ethylenedioxythiophene):poly(styrenesulfonic acid) (PEDOT:PSS) and used as a hole collecting electrode, while in an inverted device configuration, the ITO electrode is turned into the electron collecting contact by surface modification with zinc oxide (ZnO). The standard cells sequence is ITO/PEDOT:PSS/PBDTTT-C:[70]PCBM/Ca/Al and the inverted cells one is ITO/ZnO/PBDTTT-C:[70]PCBM/MoO3/Ag. We studied the electrical behavior (by means of IV-dark and IV-light at different illumination levels and external quantum efficiency measurements) of both kinds of devices in order to investigate the influence of the architecture (standard vs inverted) on the performance of the solar cells.
{"title":"High-efficiency standard and inverted polymer solar cells based on PBDTTT-C:[70]PCBM blend","authors":"P. Morvillo, R. Diana, R. Ricciardi, E. Bobeico, C. Minarini","doi":"10.1109/FOTONICA.2014.6843940","DOIUrl":"https://doi.org/10.1109/FOTONICA.2014.6843940","url":null,"abstract":"The architecture of a polymer solar cell plays a crucial role on its stability because some of the materials used to build the device can suffer from degradation when exposed to air and/or oxygen. In this work we made a comparative study between the standard and the inverted polymer solar cells based on the bulk-heterojunction structure. We realized standard and inverted polymer solar cells using a blend film of poly[(4,8-bis-(2-ethylhexyloxy)-benzo[1,2-b;4,5-b']dithiophene)-2,6-diyl-alt-(4-(2-ethylhexanoyl)-thieno[3,4-b]thiopene)-2,6-diyl] / [6,6]-phenyl C71 butyric acid methyl ester (PBDTTT-C:[70]PCBM) blend films. In the standard architecture, the transparent indium tin oxide (ITO) electrode is coated with poly-(3,4-ethylenedioxythiophene):poly(styrenesulfonic acid) (PEDOT:PSS) and used as a hole collecting electrode, while in an inverted device configuration, the ITO electrode is turned into the electron collecting contact by surface modification with zinc oxide (ZnO). The standard cells sequence is ITO/PEDOT:PSS/PBDTTT-C:[70]PCBM/Ca/Al and the inverted cells one is ITO/ZnO/PBDTTT-C:[70]PCBM/MoO3/Ag. We studied the electrical behavior (by means of IV-dark and IV-light at different illumination levels and external quantum efficiency measurements) of both kinds of devices in order to investigate the influence of the architecture (standard vs inverted) on the performance of the solar cells.","PeriodicalId":125701,"journal":{"name":"2014 Fotonica AEIT Italian Conference on Photonics Technologies","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126981365","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 : 2014-05-12DOI: 10.1109/FOTONICA.2014.6843892
L. Conte, U. Coscia, D. K. Basa, G. Ambrosone, V. Rigato
Nanostructured films composed of silicon crystallites embedded in a hydrogenated amorphous silicon carbon matrix have been deposited by plasma enhanced chemical vapour deposition from silane-methane mixtures diluted in hydrogen varying the rf power. Structural, optical and photoconductivity properties of the films have been investigated. The increase in rf power in the 40-80 W range enhances the incorporation of carbon in the amorphous matrix and decreases the fraction and size of the silicon crystallites leading to an enlargement of the optical band gap from 2.07 to 2.20 eV. Steady state spectral photoconductivity measurements have been performed under monochromatic radiations in the 460-1050 nm range. It has been demonstrated that monomolecular recombination kinetics occurs in the samples under illumination and the deterioration of the phototransport properties, with increasing the rf power, are correlated to the reduction of the mobility lifetime product of the free electrons. However, the mobility lifetime product as a function of the optical band gap shows high values as in the case of device quality films deposited by silane-methane mixtures diluted in hydrogen.
{"title":"Spectral photoconductivity of nanostructured silicon carbon films spectral photoconductivity of SiC thin films","authors":"L. Conte, U. Coscia, D. K. Basa, G. Ambrosone, V. Rigato","doi":"10.1109/FOTONICA.2014.6843892","DOIUrl":"https://doi.org/10.1109/FOTONICA.2014.6843892","url":null,"abstract":"Nanostructured films composed of silicon crystallites embedded in a hydrogenated amorphous silicon carbon matrix have been deposited by plasma enhanced chemical vapour deposition from silane-methane mixtures diluted in hydrogen varying the rf power. Structural, optical and photoconductivity properties of the films have been investigated. The increase in rf power in the 40-80 W range enhances the incorporation of carbon in the amorphous matrix and decreases the fraction and size of the silicon crystallites leading to an enlargement of the optical band gap from 2.07 to 2.20 eV. Steady state spectral photoconductivity measurements have been performed under monochromatic radiations in the 460-1050 nm range. It has been demonstrated that monomolecular recombination kinetics occurs in the samples under illumination and the deterioration of the phototransport properties, with increasing the rf power, are correlated to the reduction of the mobility lifetime product of the free electrons. However, the mobility lifetime product as a function of the optical band gap shows high values as in the case of device quality films deposited by silane-methane mixtures diluted in hydrogen.","PeriodicalId":125701,"journal":{"name":"2014 Fotonica AEIT Italian Conference on Photonics Technologies","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123189105","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 : 2014-05-12DOI: 10.1109/FOTONICA.2014.6843890
N. Beverini, G. Carelli, E. Maccioni, D. Cuccato, A. Ortolan, R. Santagata, S. Solimeno, G. Passeggio, A. Porzio, J. Belfi, F. Bosi, A. D. Di Virgilio
He-Ne ring lasers are, actually, the most sensitive devices for inertial rotation measurements. Depending on their linear dimensions, they find applications in different fields: from inertial navigation to structural engineering, from metrology to geophysics and fundamental physics. Here we report the recent progresses toward the development of GINGER- Gyroscopes IN GEneral Relativity, a triaxial ultra-sensitive ring laser gyroscope whose primary target is a ground measurement the Lense-Thirring effect, a small shift of the Earth rotation rate foreseen by Einstein's General Relativity. This target implies a measurement of the Earth rotation rate with a sensitivity better than one part over 1010 and so requires a high level of stability and accuracy of the laser array and of the gyroscope stability. The main part of the research activity presented in this paper involves, then, a strict control of the systematic errors related to the fluctuation of the optical cavity geometry and of the laser parameters.
{"title":"Toward the “perfect square” ring laser gyroscope","authors":"N. Beverini, G. Carelli, E. Maccioni, D. Cuccato, A. Ortolan, R. Santagata, S. Solimeno, G. Passeggio, A. Porzio, J. Belfi, F. Bosi, A. D. Di Virgilio","doi":"10.1109/FOTONICA.2014.6843890","DOIUrl":"https://doi.org/10.1109/FOTONICA.2014.6843890","url":null,"abstract":"He-Ne ring lasers are, actually, the most sensitive devices for inertial rotation measurements. Depending on their linear dimensions, they find applications in different fields: from inertial navigation to structural engineering, from metrology to geophysics and fundamental physics. Here we report the recent progresses toward the development of GINGER- Gyroscopes IN GEneral Relativity, a triaxial ultra-sensitive ring laser gyroscope whose primary target is a ground measurement the Lense-Thirring effect, a small shift of the Earth rotation rate foreseen by Einstein's General Relativity. This target implies a measurement of the Earth rotation rate with a sensitivity better than one part over 1010 and so requires a high level of stability and accuracy of the laser array and of the gyroscope stability. The main part of the research activity presented in this paper involves, then, a strict control of the systematic errors related to the fluctuation of the optical cavity geometry and of the laser parameters.","PeriodicalId":125701,"journal":{"name":"2014 Fotonica AEIT Italian Conference on Photonics Technologies","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114082121","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：