Pub Date : 2014-05-07DOI: 10.1109/MEPHOCO.2014.6866491
A. Crescitelli, A. Ricciardi, M. Consales, G. Quero, E. Esposito, A. Cutolo, A. Cusano
We have recently demonstrated a valuable fabrication path for the integration and patterning of functional materials at micro and nano-scale onto optical fibers, posing the basis for a new and emerging technological vision named “Lab on Fiber”. This process has been validated through the realization, directly onto the fiber tip, of 2D metallo-dielectric nano-crystals, supporting local surface plasmon resonances (LSPRs). In this work, we demonstrate numerically and experimentally, how it is possible to obtain polarization sensitive devices, by breaking the circular crystal symmetry and /or the lattice periodicity of our platform.
{"title":"Fiber optic nanoprobes as polarization sensitive devices","authors":"A. Crescitelli, A. Ricciardi, M. Consales, G. Quero, E. Esposito, A. Cutolo, A. Cusano","doi":"10.1109/MEPHOCO.2014.6866491","DOIUrl":"https://doi.org/10.1109/MEPHOCO.2014.6866491","url":null,"abstract":"We have recently demonstrated a valuable fabrication path for the integration and patterning of functional materials at micro and nano-scale onto optical fibers, posing the basis for a new and emerging technological vision named “Lab on Fiber”. This process has been validated through the realization, directly onto the fiber tip, of 2D metallo-dielectric nano-crystals, supporting local surface plasmon resonances (LSPRs). In this work, we demonstrate numerically and experimentally, how it is possible to obtain polarization sensitive devices, by breaking the circular crystal symmetry and /or the lattice periodicity of our platform.","PeriodicalId":219746,"journal":{"name":"2014 Third Mediterranean Photonics Conference","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117273523","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 : 2014-05-07DOI: 10.1109/MEPHOCO.2014.6866489
D. J. Passos, S. Silva, M. Marques, O. Frazão
A new, fiber-based, cavity ring-down topology is presented which enables the application of the cavity ring-down technique to remote sensing, by the use of a large cavity ring and an optical circulator. For a proof of concept a 1.5 km ring is assembled and a taper is used as a sensing head for measuring displacement. The cavity ring-down technique is seen to hold some potential for remote sensing through its implementation on optical fibers.
{"title":"A new cavity ring-down topology for remote sensing","authors":"D. J. Passos, S. Silva, M. Marques, O. Frazão","doi":"10.1109/MEPHOCO.2014.6866489","DOIUrl":"https://doi.org/10.1109/MEPHOCO.2014.6866489","url":null,"abstract":"A new, fiber-based, cavity ring-down topology is presented which enables the application of the cavity ring-down technique to remote sensing, by the use of a large cavity ring and an optical circulator. For a proof of concept a 1.5 km ring is assembled and a taper is used as a sensing head for measuring displacement. The cavity ring-down technique is seen to hold some potential for remote sensing through its implementation on optical fibers.","PeriodicalId":219746,"journal":{"name":"2014 Third Mediterranean Photonics Conference","volume":"81 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114901184","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 : 2014-05-07DOI: 10.1109/MEPHOCO.2014.6866482
M. Sumetsky
Nanoscale effects in miniature optical fibre-based devices are reviewed. Propagation of the fundamental mode in subwavelength diameter optical fibres and whispering gallery modes in fibres having the diameter much greater than the wavelength are considered.
{"title":"Nanophotonics of optical fibres","authors":"M. Sumetsky","doi":"10.1109/MEPHOCO.2014.6866482","DOIUrl":"https://doi.org/10.1109/MEPHOCO.2014.6866482","url":null,"abstract":"Nanoscale effects in miniature optical fibre-based devices are reviewed. Propagation of the fundamental mode in subwavelength diameter optical fibres and whispering gallery modes in fibres having the diameter much greater than the wavelength are considered.","PeriodicalId":219746,"journal":{"name":"2014 Third Mediterranean Photonics Conference","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122233944","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 : 2014-05-07DOI: 10.1109/MEPHOCO.2014.6866468
N. Chikhi, M. Lisitskiy, R. Casini, G. Papari, V. Tkachenko, H. Altan, A. Andreone
The aim of this work is to investigate new classes of artificial materials exhibiting unconventional properties in order to build novel devices operating in the Terahertz regime. We focus on the design, fabrication and characterization of tunable metamaterials with unit cells based on Split Ring Resonators. By incorporation of a nematic liquid crystal in the structure, we observe a frequency shift in the resonant response over 10% in bandwidth and more than 10 dB change in the signal absorption. We discuss how such a hybrid structure can be exploited for the development of a THz spatial light modulator.
{"title":"THz characterization of a metamaterial-based spatial light modulator","authors":"N. Chikhi, M. Lisitskiy, R. Casini, G. Papari, V. Tkachenko, H. Altan, A. Andreone","doi":"10.1109/MEPHOCO.2014.6866468","DOIUrl":"https://doi.org/10.1109/MEPHOCO.2014.6866468","url":null,"abstract":"The aim of this work is to investigate new classes of artificial materials exhibiting unconventional properties in order to build novel devices operating in the Terahertz regime. We focus on the design, fabrication and characterization of tunable metamaterials with unit cells based on Split Ring Resonators. By incorporation of a nematic liquid crystal in the structure, we observe a frequency shift in the resonant response over 10% in bandwidth and more than 10 dB change in the signal absorption. We discuss how such a hybrid structure can be exploited for the development of a THz spatial light modulator.","PeriodicalId":219746,"journal":{"name":"2014 Third Mediterranean Photonics Conference","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132361768","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 : 2014-05-07DOI: 10.1109/MEPHOCO.2014.6866472
D. Janner, V. Pruneri
We will review the current status of domain inverted lithium niobate acousto- and electro-optic devices and show how the introduction of domain micro-engineering techniques can have a strong impact on modulators' performance enabling for a new class of integrated devices. We will also present potential applications of the proposed devices in increasingly important areas, such as advanced optical communication modulation formats, reconfigurable networks and sensors.
{"title":"Integrated devices in ferroelectrics for optical modulations and sensing","authors":"D. Janner, V. Pruneri","doi":"10.1109/MEPHOCO.2014.6866472","DOIUrl":"https://doi.org/10.1109/MEPHOCO.2014.6866472","url":null,"abstract":"We will review the current status of domain inverted lithium niobate acousto- and electro-optic devices and show how the introduction of domain micro-engineering techniques can have a strong impact on modulators' performance enabling for a new class of integrated devices. We will also present potential applications of the proposed devices in increasingly important areas, such as advanced optical communication modulation formats, reconfigurable networks and sensors.","PeriodicalId":219746,"journal":{"name":"2014 Third Mediterranean Photonics Conference","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129167891","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 : 2014-05-07DOI: 10.1109/MEPHOCO.2014.6866481
G. Zito, G. Rusciano, G. Pesce, A. Dochshanov, Anna Malafronte, Giovanni Ausanio, A. Sasso
We are developing a polymer-silver nanocomposite self-assembling-based protocol for fabricating surface-enhanced Raman scattering (SERS) substrates for versatile applications. The substrate is based on a silver-made fractal nanotexture produced by the long-range self-assembling of Ag-loaded block-copolymer micelles. We removed the nano-packing limitation imposed by the copolymer shell, achieving a condition close to the so-called hyperuniform structural disorder. Despite the large enhancement factor, estimated up to 109, the SERS response shows an ultrahigh spatial uniformity with a relative standard deviation in the range 0.9% - 5.6%, as measured from raster scans covering a total area of 1 cm2, that is from an active surface orders of magnitude larger than the typical nanofeature size and produced by an innovative low-cost and immediate deposition. The SERS-active coating allows large-scale spectroscopic scanning as required for real biological applications, still having, as experimentally evidenced, single-molecule sensitivity.
{"title":"Plasmon-enhanced Raman spectroscopy: Towards hyperuniform ultrasensitive enhancement through hyperuniform disorder","authors":"G. Zito, G. Rusciano, G. Pesce, A. Dochshanov, Anna Malafronte, Giovanni Ausanio, A. Sasso","doi":"10.1109/MEPHOCO.2014.6866481","DOIUrl":"https://doi.org/10.1109/MEPHOCO.2014.6866481","url":null,"abstract":"We are developing a polymer-silver nanocomposite self-assembling-based protocol for fabricating surface-enhanced Raman scattering (SERS) substrates for versatile applications. The substrate is based on a silver-made fractal nanotexture produced by the long-range self-assembling of Ag-loaded block-copolymer micelles. We removed the nano-packing limitation imposed by the copolymer shell, achieving a condition close to the so-called hyperuniform structural disorder. Despite the large enhancement factor, estimated up to 109, the SERS response shows an ultrahigh spatial uniformity with a relative standard deviation in the range 0.9% - 5.6%, as measured from raster scans covering a total area of 1 cm2, that is from an active surface orders of magnitude larger than the typical nanofeature size and produced by an innovative low-cost and immediate deposition. The SERS-active coating allows large-scale spectroscopic scanning as required for real biological applications, still having, as experimentally evidenced, single-molecule sensitivity.","PeriodicalId":219746,"journal":{"name":"2014 Third Mediterranean Photonics Conference","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127777109","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 : 2014-05-07DOI: 10.1109/MEPHOCO.2014.6866478
S. Tofighi, M. Afsary, A. Bahrampour
The non-paraxial and vectorial effects have an important role in the dynamics of highly confined beam in nonlinear medium. In this paper, we study the vectorial non-paraxial propagation of Gaussian field in the saturable absorber media numerically with the aim of nano-lithography. It is shown that in the optimal regimes for nanolithography, the mutual coupling between components of optical field and mode coupling between different orders of Hermite-Gaussian mode lead to generation of various patterns upon propagation through saturable absorber media. The vectorial effect is responsible for the symmetry breaking. For converging input beam, while the intense part of the beam goes toward the focal point, the low intensity parts of beam profile are eliminated. Finally, the Gaussian profile is recovered at the location of minimum spot size which is of the order of several tens of nanometer.
{"title":"Saturable absorber nanolithography by vectorial nonparaxial Gaussian beam","authors":"S. Tofighi, M. Afsary, A. Bahrampour","doi":"10.1109/MEPHOCO.2014.6866478","DOIUrl":"https://doi.org/10.1109/MEPHOCO.2014.6866478","url":null,"abstract":"The non-paraxial and vectorial effects have an important role in the dynamics of highly confined beam in nonlinear medium. In this paper, we study the vectorial non-paraxial propagation of Gaussian field in the saturable absorber media numerically with the aim of nano-lithography. It is shown that in the optimal regimes for nanolithography, the mutual coupling between components of optical field and mode coupling between different orders of Hermite-Gaussian mode lead to generation of various patterns upon propagation through saturable absorber media. The vectorial effect is responsible for the symmetry breaking. For converging input beam, while the intense part of the beam goes toward the focal point, the low intensity parts of beam profile are eliminated. Finally, the Gaussian profile is recovered at the location of minimum spot size which is of the order of several tens of nanometer.","PeriodicalId":219746,"journal":{"name":"2014 Third Mediterranean Photonics Conference","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122036562","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 : 2014-05-07DOI: 10.1109/MEPHOCO.2014.6866493
G. Zito, S. de Nicola, G. Pepe, L. Petti
We propose an analytical method for generating a two-dimensional quasiperiodic pattern with dodocagonal rotational symmetry. The method allows producing the quasiperiodic structure by a finite number of translational steps of a properly designed repeating unit. The quasiperiodic symmetry affects the diffraction pattern and its characteristics are analyzed via theoretical calculation of the Fourier spectrum of the structure. We show that it is possible to express the Fourier spectrum in terms of the spectral distribution of the basic unit.
{"title":"Spectral characterization of dodecagonal quasicrystals","authors":"G. Zito, S. de Nicola, G. Pepe, L. Petti","doi":"10.1109/MEPHOCO.2014.6866493","DOIUrl":"https://doi.org/10.1109/MEPHOCO.2014.6866493","url":null,"abstract":"We propose an analytical method for generating a two-dimensional quasiperiodic pattern with dodocagonal rotational symmetry. The method allows producing the quasiperiodic structure by a finite number of translational steps of a properly designed repeating unit. The quasiperiodic symmetry affects the diffraction pattern and its characteristics are analyzed via theoretical calculation of the Fourier spectrum of the structure. We show that it is possible to express the Fourier spectrum in terms of the spectral distribution of the basic unit.","PeriodicalId":219746,"journal":{"name":"2014 Third Mediterranean Photonics Conference","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122903134","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 : 2014-05-07DOI: 10.1109/MEPHOCO.2014.6866456
F. Dell’Olio, F. Indiveri, F. Innone, C. Ciminelli, M. Armenise
Miniaturization of the currently available medium- and high-performance angular velocity sensors is crucial for aerospace and defense industry. To face this technological challenge, we are investigating a new gyro, called gyroscope-on-chip (GoC), based on the InP photonic integrated circuits technology. The sensor we refer includes a passive ring resonator with a Q greater than one million and several optical/optoelectronic components all monolithically integrated on a single InP chip. Recent progress on the demonstration of the GoC is reported in this paper. In particular, the configuration of the readout circuit and the countermeasures against the backscattering noise are discussed.
{"title":"Experimental countermeasures to reduce the backscattering noise in an InP hybrid optical gyroscope","authors":"F. Dell’Olio, F. Indiveri, F. Innone, C. Ciminelli, M. Armenise","doi":"10.1109/MEPHOCO.2014.6866456","DOIUrl":"https://doi.org/10.1109/MEPHOCO.2014.6866456","url":null,"abstract":"Miniaturization of the currently available medium- and high-performance angular velocity sensors is crucial for aerospace and defense industry. To face this technological challenge, we are investigating a new gyro, called gyroscope-on-chip (GoC), based on the InP photonic integrated circuits technology. The sensor we refer includes a passive ring resonator with a Q greater than one million and several optical/optoelectronic components all monolithically integrated on a single InP chip. Recent progress on the demonstration of the GoC is reported in this paper. In particular, the configuration of the readout circuit and the countermeasures against the backscattering noise are discussed.","PeriodicalId":219746,"journal":{"name":"2014 Third Mediterranean Photonics Conference","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121106052","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 : 2014-05-07DOI: 10.1109/MEPHOCO.2014.6866480
A. Silva, F. Monticone, G. Castaldi, V. Galdi, A. Alú, N. Engheta
We summarize the basic aspects of the recently introduced concept of “metamaterial analog computing”. This concept relies on metamaterial structures that are suitably designed so as to perform mathematical operations of choice (e.g., spatial differentiation, integration, or convolution) on the transverse profile of an impinging wave signal as it propagates through them. Within this framework, we illustrate two possible design approaches, present some representative results, and discuss possible future developments.
{"title":"Metamaterial-based analog computing","authors":"A. Silva, F. Monticone, G. Castaldi, V. Galdi, A. Alú, N. Engheta","doi":"10.1109/MEPHOCO.2014.6866480","DOIUrl":"https://doi.org/10.1109/MEPHOCO.2014.6866480","url":null,"abstract":"We summarize the basic aspects of the recently introduced concept of “metamaterial analog computing”. This concept relies on metamaterial structures that are suitably designed so as to perform mathematical operations of choice (e.g., spatial differentiation, integration, or convolution) on the transverse profile of an impinging wave signal as it propagates through them. Within this framework, we illustrate two possible design approaches, present some representative results, and discuss possible future developments.","PeriodicalId":219746,"journal":{"name":"2014 Third Mediterranean Photonics Conference","volume":"111 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117239217","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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