Pub Date : 2016-09-01DOI: 10.1109/METAMATERIALS.2016.7746471
T. Kasagi, H. Massango, T. Tsutaoka, S. Yamamoto, K. Hatakeyama
Complex permeability spectra of Permendur and Cobalt flake composite materials in the microwave frequency range has been studied to reveal the demagnetizing field effect. The permeability spectrum of ferromagnetic metal composites depends on the shape and the alignment direction of embedded particles; demagnetizing field induced in the particles affects the magnetic permeability and the magnetic resonance frequency of the composite material. In the Permendur composites, a negative permeability caused by the magnetic resonance is obtained and its frequency dispersion can be controlled by the demagnetizing field in the embedded particles as well as the particle content in composite structure.
{"title":"Demagnetizing field effect on the complex permeability spectra of ferromagnetic metal flake composite materials in the microwave frequency range","authors":"T. Kasagi, H. Massango, T. Tsutaoka, S. Yamamoto, K. Hatakeyama","doi":"10.1109/METAMATERIALS.2016.7746471","DOIUrl":"https://doi.org/10.1109/METAMATERIALS.2016.7746471","url":null,"abstract":"Complex permeability spectra of Permendur and Cobalt flake composite materials in the microwave frequency range has been studied to reveal the demagnetizing field effect. The permeability spectrum of ferromagnetic metal composites depends on the shape and the alignment direction of embedded particles; demagnetizing field induced in the particles affects the magnetic permeability and the magnetic resonance frequency of the composite material. In the Permendur composites, a negative permeability caused by the magnetic resonance is obtained and its frequency dispersion can be controlled by the demagnetizing field in the embedded particles as well as the particle content in composite structure.","PeriodicalId":6587,"journal":{"name":"2016 10th International Congress on Advanced Electromagnetic Materials in Microwaves and Optics (METAMATERIALS)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76491440","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 : 2016-09-01DOI: 10.1109/METAMATERIALS.2016.7746375
M. Abdalla, A. Al-Mohamadi, A. Mostafa
This paper presents an ultra-wideband monopole antenna integrated with a new configuration of electromagnetic band gap (EBG) structure. The operating frequency band of the ultra-wideband antenna is 3.1 GHz-10.6 GHz whereas the dual rejected centre frequencies are 5.2 GHz and 5.8 GHz. These two notched bands are to eliminate interference with wireless local area networks. The new proposed EBG structure is composed of a double inversed U-shape slotted patch and edge-located via. By using this new EBG structure, a high notching selectivity can be achieved for both bands. Compared to conventional mushroom-like EBG structure, the proposed configuration of the EBG structure can reject dual band instead of single band and it is 73 % smaller. The detailed theoretical explanations supported by electromagnetic full-wave simulations and confirmed by experimental measurements are introduced.
{"title":"Dual notching of UWB antenna using double inversed U-shape compact EBG structure","authors":"M. Abdalla, A. Al-Mohamadi, A. Mostafa","doi":"10.1109/METAMATERIALS.2016.7746375","DOIUrl":"https://doi.org/10.1109/METAMATERIALS.2016.7746375","url":null,"abstract":"This paper presents an ultra-wideband monopole antenna integrated with a new configuration of electromagnetic band gap (EBG) structure. The operating frequency band of the ultra-wideband antenna is 3.1 GHz-10.6 GHz whereas the dual rejected centre frequencies are 5.2 GHz and 5.8 GHz. These two notched bands are to eliminate interference with wireless local area networks. The new proposed EBG structure is composed of a double inversed U-shape slotted patch and edge-located via. By using this new EBG structure, a high notching selectivity can be achieved for both bands. Compared to conventional mushroom-like EBG structure, the proposed configuration of the EBG structure can reject dual band instead of single band and it is 73 % smaller. The detailed theoretical explanations supported by electromagnetic full-wave simulations and confirmed by experimental measurements are introduced.","PeriodicalId":6587,"journal":{"name":"2016 10th International Congress on Advanced Electromagnetic Materials in Microwaves and Optics (METAMATERIALS)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89042410","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 : 2016-09-01DOI: 10.1109/METAMATERIALS.2016.7746448
A. Couch, A. Grbic
The tunable dielectric anisotropy of liquid crystals is used to design a metasurface that acts as a phase-tunable reflector. An equivalent circuit is developed for the metasurface which closely models its simulation performance. The design and fabrication procedure for the metasurface is discussed. An experimental prototype is shown to exhibit 186° of phase swing.
{"title":"A phase-tunable, liquid crystal-based metasurface","authors":"A. Couch, A. Grbic","doi":"10.1109/METAMATERIALS.2016.7746448","DOIUrl":"https://doi.org/10.1109/METAMATERIALS.2016.7746448","url":null,"abstract":"The tunable dielectric anisotropy of liquid crystals is used to design a metasurface that acts as a phase-tunable reflector. An equivalent circuit is developed for the metasurface which closely models its simulation performance. The design and fabrication procedure for the metasurface is discussed. An experimental prototype is shown to exhibit 186° of phase swing.","PeriodicalId":6587,"journal":{"name":"2016 10th International Congress on Advanced Electromagnetic Materials in Microwaves and Optics (METAMATERIALS)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89071130","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 : 2016-09-01DOI: 10.1109/METAMATERIALS.2016.7746445
M. Abdalla, N. A. El-Sobky, Mohamed Nabil ElGabry
This paper presents a metamaterial inspired dual-wide band CPW-fed antenna using split-ring resonator structure. The antenna design is inspired from conventional circular monopole antenna to two split rings resonators. The antenna geometry is optimized to achieve two wide bands; the lower band covers the band 2.65 GHz to 3.25 GHz where the higher band covers the band 5 GHz to 7 GHz. The antenna dimensions are optimized for compact size (30 mm × 30 mm). The antenna radiation pattern is kept as Omni-directional in both bands. Full wave simulation and experimental measurements results are introduced with good matching between them.
{"title":"Metamaterials inspired dual-wide band CPW-fed antenna using split ring resonator structure","authors":"M. Abdalla, N. A. El-Sobky, Mohamed Nabil ElGabry","doi":"10.1109/METAMATERIALS.2016.7746445","DOIUrl":"https://doi.org/10.1109/METAMATERIALS.2016.7746445","url":null,"abstract":"This paper presents a metamaterial inspired dual-wide band CPW-fed antenna using split-ring resonator structure. The antenna design is inspired from conventional circular monopole antenna to two split rings resonators. The antenna geometry is optimized to achieve two wide bands; the lower band covers the band 2.65 GHz to 3.25 GHz where the higher band covers the band 5 GHz to 7 GHz. The antenna dimensions are optimized for compact size (30 mm × 30 mm). The antenna radiation pattern is kept as Omni-directional in both bands. Full wave simulation and experimental measurements results are introduced with good matching between them.","PeriodicalId":6587,"journal":{"name":"2016 10th International Congress on Advanced Electromagnetic Materials in Microwaves and Optics (METAMATERIALS)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90410903","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 : 2016-09-01DOI: 10.1109/METAMATERIALS.2016.7746411
C. Guclu, M. Veysi, M. Darvishzadeh-Vercheie, F. Capolino
A class of optical nanoantennas utilized as photoinduced magnetic nanoprobes is studied for enhancing magnetic near-field in a magnetic-dominant region with vanishing electric field. We examine the illumination of such magnetic nanoprobes that guarantees selective excitation of magnetic resonances, such as azimuthally electric polarized beams (APBs) which possess a strong longitudinal magnetic field on the beam axis where the electric field is ideally null. Magnetic nanoprobes whose magnetic resonances are selectively excited show a large magnetic near-field enhancement and large magnetic-to-electric-field contrast ratio. Such nanoprobes are the basis for the development of future magnetic-base spectroscopy and macroscopy systems.
{"title":"Optical nanoantennas as magnetic nanoprobes for enhancing light-matter interaction","authors":"C. Guclu, M. Veysi, M. Darvishzadeh-Vercheie, F. Capolino","doi":"10.1109/METAMATERIALS.2016.7746411","DOIUrl":"https://doi.org/10.1109/METAMATERIALS.2016.7746411","url":null,"abstract":"A class of optical nanoantennas utilized as photoinduced magnetic nanoprobes is studied for enhancing magnetic near-field in a magnetic-dominant region with vanishing electric field. We examine the illumination of such magnetic nanoprobes that guarantees selective excitation of magnetic resonances, such as azimuthally electric polarized beams (APBs) which possess a strong longitudinal magnetic field on the beam axis where the electric field is ideally null. Magnetic nanoprobes whose magnetic resonances are selectively excited show a large magnetic near-field enhancement and large magnetic-to-electric-field contrast ratio. Such nanoprobes are the basis for the development of future magnetic-base spectroscopy and macroscopy systems.","PeriodicalId":6587,"journal":{"name":"2016 10th International Congress on Advanced Electromagnetic Materials in Microwaves and Optics (METAMATERIALS)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90585796","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 : 2016-09-01DOI: 10.1109/METAMATERIALS.2016.7746492
S. Louis, I. Lisenkov, S. Nikitov, V. Tyberkevych, A. Slavin
We propose a reconfigurable magnonic metamaterial based on an array of dipolarly-coupled magnetic nano-pillars having perpendicular shape anisotropy. The static magnetic ground state of such a metamaterial is antiferromagnetic (AFM), and a linear defect in the form of ferromagnetically (FM) ordered chain of nano-pillars can act as a waveguide supporting a strongly localized spin wave on the linear defect whose frequency is well-separated from the bulk spin wave spectrum of the metamaterial. The phase of this localized SW can be controlled by placing an additional point defect (a pillar with inverted magnetization direction) near the waveguide. In our case the phase shift is close to π radians, which corresponds to the operation of the phase inverter working without an external bias magnetic field. Since the phase shift is achieved by changing the orientation of magnetization of a single pillar, it is possible to dynamically control this phase shift. Also, by changing the orientation of the pillars placed further from the waveguide it is possible to vary the magnitude of the phase shift without significant changes in the spin wave amplitude.
{"title":"Reconfigurable magnonic metamaterial for microwave signal processing","authors":"S. Louis, I. Lisenkov, S. Nikitov, V. Tyberkevych, A. Slavin","doi":"10.1109/METAMATERIALS.2016.7746492","DOIUrl":"https://doi.org/10.1109/METAMATERIALS.2016.7746492","url":null,"abstract":"We propose a reconfigurable magnonic metamaterial based on an array of dipolarly-coupled magnetic nano-pillars having perpendicular shape anisotropy. The static magnetic ground state of such a metamaterial is antiferromagnetic (AFM), and a linear defect in the form of ferromagnetically (FM) ordered chain of nano-pillars can act as a waveguide supporting a strongly localized spin wave on the linear defect whose frequency is well-separated from the bulk spin wave spectrum of the metamaterial. The phase of this localized SW can be controlled by placing an additional point defect (a pillar with inverted magnetization direction) near the waveguide. In our case the phase shift is close to π radians, which corresponds to the operation of the phase inverter working without an external bias magnetic field. Since the phase shift is achieved by changing the orientation of magnetization of a single pillar, it is possible to dynamically control this phase shift. Also, by changing the orientation of the pillars placed further from the waveguide it is possible to vary the magnitude of the phase shift without significant changes in the spin wave amplitude.","PeriodicalId":6587,"journal":{"name":"2016 10th International Congress on Advanced Electromagnetic Materials in Microwaves and Optics (METAMATERIALS)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89980708","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 : 2016-09-01DOI: 10.1109/METAMATERIALS.2016.7746390
S. Shitov, A. Yahya, A. Ustinov
To control phase velocity in superconducting transmission lines using short electrical pulses, a few approaches are being developed. A new design is developed for left-to-right (L2R) and right-to-left (R2L) tunable transmission lines based on a CPW with embedded paired resonators containing dc-SQUIDs. Experimental layouts are designed according to rules of 2-μm Nb-Al/AlOx-Nb technology for Jc ≈ 0.1 kA/cm2 and compared numerically with a scheme-model containing 40 cells at frequencies up to 20 GHz. Characteristic impedance of new dispersive transmission lines is increased above 30 Ohm; a thin-film attenuator is integrated for suppression of standing waves. A stop-band is found for R2L line demonstrating slower phase velocity; this transmission gap is due to effect of shorter wavelength (up to 100 times) reaching electrical length of the paired resonators cell (70 μm). In case of L2R line with faster phase velocity, the transmission band can be almost flat, if simultaneous tuning of frequency for all paired resonators is provided. No negative phase velocity is found in the simulations; however, the increment of differential phase velocity is positive for R2L near edge of the stop-band and negative near the resonance for L2R case.
{"title":"Superconducting transmission lines with pulse-controlled dispersion","authors":"S. Shitov, A. Yahya, A. Ustinov","doi":"10.1109/METAMATERIALS.2016.7746390","DOIUrl":"https://doi.org/10.1109/METAMATERIALS.2016.7746390","url":null,"abstract":"To control phase velocity in superconducting transmission lines using short electrical pulses, a few approaches are being developed. A new design is developed for left-to-right (L2R) and right-to-left (R2L) tunable transmission lines based on a CPW with embedded paired resonators containing dc-SQUIDs. Experimental layouts are designed according to rules of 2-μm Nb-Al/AlOx-Nb technology for Jc ≈ 0.1 kA/cm2 and compared numerically with a scheme-model containing 40 cells at frequencies up to 20 GHz. Characteristic impedance of new dispersive transmission lines is increased above 30 Ohm; a thin-film attenuator is integrated for suppression of standing waves. A stop-band is found for R2L line demonstrating slower phase velocity; this transmission gap is due to effect of shorter wavelength (up to 100 times) reaching electrical length of the paired resonators cell (70 μm). In case of L2R line with faster phase velocity, the transmission band can be almost flat, if simultaneous tuning of frequency for all paired resonators is provided. No negative phase velocity is found in the simulations; however, the increment of differential phase velocity is positive for R2L near edge of the stop-band and negative near the resonance for L2R case.","PeriodicalId":6587,"journal":{"name":"2016 10th International Congress on Advanced Electromagnetic Materials in Microwaves and Optics (METAMATERIALS)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88512017","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 : 2016-09-01DOI: 10.1109/METAMATERIALS.2016.7746476
M. Kildemo, X. Wang, V. Ponsinet, D. Chiappe, F. Buatier de Mongeot
Hyperbolic metamaterials use the concept of controlling the propagative modes through the engineering of the dispersion relation, and are considered highly promising to reach different meta-properties. Spectroscopic Mueller Matrix Ellipsometry with variable angle of incidence and full azimuthal rotation of the sample is a powerful optical technique to characterize both anisotropic and bi-anisotropic materials. We here discuss the experimentally extracted uniaxial and biaxial optical properties of two self-assembled plasmonic systems that appear to have the appropriate meta-dispersion relations. The metasurface was produced by oblique incidence angle ion beam sputtering of glass followed by shadow deposition of Au [1]. The second bulk metamaterial was a block-copolymer based self-assembled hyperbolic metamaterial of nanocomposites based on metal nanoparticles embedded in a self-assembled anisotropic polymer host, presenting a strong spectrally selective optical anisotropy [2]. The extracted effective dielectric functions and the resulting dispersion relations are presented.
{"title":"Optical properties of self-assembled plasmonic hyperbolic metasurfaces and metamaterials extracted by (Mueller matrix) spectroscopic ellipsometry","authors":"M. Kildemo, X. Wang, V. Ponsinet, D. Chiappe, F. Buatier de Mongeot","doi":"10.1109/METAMATERIALS.2016.7746476","DOIUrl":"https://doi.org/10.1109/METAMATERIALS.2016.7746476","url":null,"abstract":"Hyperbolic metamaterials use the concept of controlling the propagative modes through the engineering of the dispersion relation, and are considered highly promising to reach different meta-properties. Spectroscopic Mueller Matrix Ellipsometry with variable angle of incidence and full azimuthal rotation of the sample is a powerful optical technique to characterize both anisotropic and bi-anisotropic materials. We here discuss the experimentally extracted uniaxial and biaxial optical properties of two self-assembled plasmonic systems that appear to have the appropriate meta-dispersion relations. The metasurface was produced by oblique incidence angle ion beam sputtering of glass followed by shadow deposition of Au [1]. The second bulk metamaterial was a block-copolymer based self-assembled hyperbolic metamaterial of nanocomposites based on metal nanoparticles embedded in a self-assembled anisotropic polymer host, presenting a strong spectrally selective optical anisotropy [2]. The extracted effective dielectric functions and the resulting dispersion relations are presented.","PeriodicalId":6587,"journal":{"name":"2016 10th International Congress on Advanced Electromagnetic Materials in Microwaves and Optics (METAMATERIALS)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85933657","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 : 2016-09-01DOI: 10.1109/METAMATERIALS.2016.7746433
N. Nookala, J. Lee, M. Tymchenko, J. S. Gómez-Díaz, F. Demmerle, G. Boehm, K. Lai, G. Shvets, M. Amann, A. Alú, M. Belkin
Extending the `flat optics' paradigm to the nonlinear optics faces important challenges, since, for any practical situation, we are required to simultaneously achieve sub-diffraction phase control and efficient frequency conversion in metasurfaces of sub-wavelength thickness. Here, we experimentally demonstrate giant nonlinear response and continuous phase control of the giant nonlinear response in metasurfaces based on plasmonic nanoresonators coupled to intersubband transitions in semiconductor multi-quantum wells. Over 0.075% of second-harmonic power conversion efficiency is achieved experimentally in a 400-nm-thick metasurface using 10 microns wavelength pump with 20 kW/cm2 intensity.
{"title":"Flat nonlinear optics with ultrathin highly-nonlinear metasurfaces","authors":"N. Nookala, J. Lee, M. Tymchenko, J. S. Gómez-Díaz, F. Demmerle, G. Boehm, K. Lai, G. Shvets, M. Amann, A. Alú, M. Belkin","doi":"10.1109/METAMATERIALS.2016.7746433","DOIUrl":"https://doi.org/10.1109/METAMATERIALS.2016.7746433","url":null,"abstract":"Extending the `flat optics' paradigm to the nonlinear optics faces important challenges, since, for any practical situation, we are required to simultaneously achieve sub-diffraction phase control and efficient frequency conversion in metasurfaces of sub-wavelength thickness. Here, we experimentally demonstrate giant nonlinear response and continuous phase control of the giant nonlinear response in metasurfaces based on plasmonic nanoresonators coupled to intersubband transitions in semiconductor multi-quantum wells. Over 0.075% of second-harmonic power conversion efficiency is achieved experimentally in a 400-nm-thick metasurface using 10 microns wavelength pump with 20 kW/cm2 intensity.","PeriodicalId":6587,"journal":{"name":"2016 10th International Congress on Advanced Electromagnetic Materials in Microwaves and Optics (METAMATERIALS)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80318902","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 : 2016-09-01DOI: 10.1109/METAMATERIALS.2016.7746510
V. Pacheco-Peña, M. Navarro‐Cía, M. Beruete
A parallel plate plasmonic waveguide is proposed in order to emulate the performance of a permittivity-near-zero metamaterial (ENZ) at optical wavelengths by working near the cut-off of the TE1 mode. It is shown that the ENZ region can be tuned by simply modifying the electrical width of the dielectric spacer of the plasmonic waveguide. Also, a graded index (GRIN) epsilon-near-zero lens working at λ0 = 474.9nm is designed by stacking 51 non-uniform plasmonic parallel plates, demonstrating numerically that this structure may be used to focus optical waves.
{"title":"Focusing optical waves via graded-epsilon-near-zero metalens","authors":"V. Pacheco-Peña, M. Navarro‐Cía, M. Beruete","doi":"10.1109/METAMATERIALS.2016.7746510","DOIUrl":"https://doi.org/10.1109/METAMATERIALS.2016.7746510","url":null,"abstract":"A parallel plate plasmonic waveguide is proposed in order to emulate the performance of a permittivity-near-zero metamaterial (ENZ) at optical wavelengths by working near the cut-off of the TE1 mode. It is shown that the ENZ region can be tuned by simply modifying the electrical width of the dielectric spacer of the plasmonic waveguide. Also, a graded index (GRIN) epsilon-near-zero lens working at λ0 = 474.9nm is designed by stacking 51 non-uniform plasmonic parallel plates, demonstrating numerically that this structure may be used to focus optical waves.","PeriodicalId":6587,"journal":{"name":"2016 10th International Congress on Advanced Electromagnetic Materials in Microwaves and Optics (METAMATERIALS)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86500332","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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