The effect of metal dispersion on the resonance of antennas at infrared frequencies

González, Francisco; Alda, Javier; Simón, Jorge; Ginn, James; Boreman, Glenn D.

doi:10.1016/j.infrared.2008.12.002

Cited by 64 publications

(28 citation statements)

References 12 publications

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“…In order to find out the influence of the material, the simulations were performed using the optical proprieties of the metal reported in the literature [16][17][18][19] . Figure 6 shows the effect of the material in the current induced on the nanostructures at infrared frequencies.…”

Section: Resultsmentioning

confidence: 99%

“…The optical parameters are frequency-dependent as shown in (Eq. 1), however, it is previously approved in the research literature 16 that the material parameters at a single frequency close to the resonance can be used instead of the frequency-dependent variable ( ). An acceptable agreement is maintained as long as the imaginary part of is included.…”

Section: Optical Analysismentioning

confidence: 99%

“…An acceptable agreement is maintained as long as the imaginary part of is included. For this work we obtained the optical parameters of metals at IR frequencies previously reported in the literature [16][17][18][19] .…”

Section: Optical Analysismentioning

confidence: 99%

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Analysis of metallic nanoantennas for solar energy conversion

et al. 2015

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Recently thermo-electrical nanoantennas, also known as Seebeck nanoantennas, have been proposed as an alternative for solar energy harvesting applications. In this work we present the optical and thermal analysis of metallic nanoantennas operating at infrared wavelengths, this study is performed by numerical simulations using COMSOL Multiphysics. Several different nanoantenna designs were analyzed including dipoles, bowties and square spiral antennas. Results show that metallic nanoantennas can be tuned to absorb electromagnetic energy at infrared wavelengths, and that numerical simulation can be useful in optimizing the performance of these types of nanoantennas at optical and infrared wavelengths.

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Section: Resultsmentioning

confidence: 99%

Section: Optical Analysismentioning

confidence: 99%

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Analysis of metallic nanoantennas for solar energy conversion

et al. 2015

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“…This equation already shows the influence of the material parameters in the performance of optical antennas. At the infrared and visible frequencies metals are no longer perfect conductors and behave as dispersive materials [16]. This means that the radiation losses increase and the surface currents penetrate deeper within the materials.…”

Section: The Antenna As Transducer Elementmentioning

confidence: 99%

Electromagnetic Radiation Energy Harvesting – The Rectenna Based Approach

Abadal¹,

Alda²,

Agustı́³

2014

ICT - Energy - Concepts Towards Zero - Power Information and Communication Technology

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“…The concept has been adapted from the radiofrequency portion of the spectrum where they are known as reflectarrays when denoting reflecting elements [3][4][5]. However, when moving to higher frequencies, the optical properties of materials at subwavelength dimensions makes them behave as imperfect conductors [6]. This behavior changes the performance of these elements at infrared and optical frequencies.…”

Section: Introductionmentioning

confidence: 99%

Monochromatic aberrations in resonant optical elements applied to a focusing multilevel reflectarray

Ginn¹,

Alda²,

Gómez‐Pedrero³

et al. 2010

Opt. Express

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Abstract:The monochromatic aberrations produced by the phase distribution reflected by resonant sub-wavelength metallic structures are studied both analytically and numerically. Even for normal incidence, the angular dependence of the re-radiated wavefront disturbs the overall performance of the reflectarray. This effect is modelled as combination of a linear and a cubic dependence. A complete numerical simulation of a multilevel focusing reflectarray is performed using computationalelectromagnetic and physical-optics-propagation methods. A modified Strehl ratio is defined to show the dependence of the focused spot behavior on aperture. The irradiance distribution is dependent on the polarization state. A small-aperture focusing reflectarray has been designed, fabricated, and tested. The irradiance distribution at the focusing plane is compared with the simulated one, showing a good agreement when residual wavefront aberrations are included.

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The effect of metal dispersion on the resonance of antennas at infrared frequencies

Cited by 64 publications

References 12 publications

Analysis of metallic nanoantennas for solar energy conversion

Analysis of metallic nanoantennas for solar energy conversion

Electromagnetic Radiation Energy Harvesting – The Rectenna Based Approach

Monochromatic aberrations in resonant optical elements applied to a focusing multilevel reflectarray

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