Broadband circularly-polarized infrared emission from multilayer metamaterials

Wadsworth, Samuel L.; Clem, Paul G.; Branson, Eric D.; Boreman, Glenn D.

doi:10.1364/ome.1.000466

Cited by 38 publications

(37 citation statements)

References 42 publications

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“…Much like the polarization dependent absorbers described earlier, metamaterials can be designed to emit with a specific polarization. Linear and circular polarized light has been measured, making use of 3D metamaterial structures and non‐symmetrical 2D structures . Both of these methods utilize the Stokes parameters to define and then optimize the polarization of emitted light through simulation.…”

Section: Tunable Spectrum Emittersmentioning

confidence: 99%

“…The 3D metamaterial utilized a wire grid array and a meanderline pattern separated by silica aerogel. This combination resulted in experimental measurements of 28% circularly polarized light and 77% linearly polarized light, with an average deviation of 5% for both polarizations . The non‐symmetrical 2D structures were generated via a genetic algorithm optimization technique .…”

Section: Tunable Spectrum Emittersmentioning

confidence: 99%

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Selective emitters for thermophotovoltaic applications

Pfiester¹,

Vandervelde

2016

Physica Status Solidi (a)

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Applying thermophotovoltaic (TPV) technologies to existing energy generators allows us to increase energy output while utilizing present infrastructure by reclaiming the heat lost during the production process. In order to maximize the efficiency of these sources, the conversion efficiency of the TPV system needs to be optimized. Selective emitters are often used to tailor the spectrum of incident light on the diode, blocking any undesirable light that may lead to device heating or recombination. Over the years, many different technologies have been researched to create an ideal selective emitter. Plasmas and rare‐earth emitters provided highly selective spectra early on, but their fixed peaks required tailoring the diode's band gap to the emitter's characteristic wavelength. Recent advances in engineerable materials, such as photonic crystals and metamaterials, allow the opposite to take place; an appropriate selective emitter can be designed to match the TPV diode, allowing the diode structure to be optimized independently from the emitter.

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Section: Tunable Spectrum Emittersmentioning

confidence: 99%

Section: Tunable Spectrum Emittersmentioning

confidence: 99%

Selective emitters for thermophotovoltaic applications

Pfiester¹,

Vandervelde

2016

Physica Status Solidi (a)

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“…(6) and (8) cannot be used unless the total electric field, E(r) is known, but the total electric field is the sum of the illuminating field, E I (r), and the scattered field, E S (r), giving…”

Section: A Dynamical Behaviourmentioning

confidence: 99%

Probing the dynamical behavior of surface dipoles through energy-absorption interferometry

Withington

Thomas

2012

Phys. Rev. A

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Spatial interferometry, based on the measurement of total absorbed power, can be used to determine the state of coherence of the electromagnetic field to which any energy-absorbing structure is sensitive. The measured coherence tensor can be diagonalized to give the amplitude, phase, polarization patterns, and responsivities of the individual electromagnetic modes through which the structure can absorb energy. Because the electromagnetic modes are intimately related to dynamical modes of the system, information about collective excitations can be found. We present simulations, based on the Discrete Dipole Approximation (DDA), showing how the dynamical modes of systems of surface dipoles can be recovered. Interactions are taken into consideration, leading to long-range coherent phenomena, which are revealed by the method. The use of DDA enables the interferometric response of a wide variety of objects to be modeled, from patterned photonic films to biological macromolecules.

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“…In 1988, the first experimental results of directional emission from a heated grating were published [1,2]. Since that time, DTE has been linked both theoretically and experimentally to the excitation of surface plasmons [3][4][5][6], and recently, fabricated structures designed to directionally emit thermal light at specific wavelengths have been demonstrated [7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Near-field effects on partially coherent light scattered by an aperture

Hyde

Havrilla

2019

J. Phys. Commun.

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We investigate how the near field affects partially coherent light scattered from an aperture in an opaque screen. Prior work on this subject has focused on the role of surface plasmons, and how they affect spatial coherence is well documented. Here, we consider other near-field effects that might impact spatial coherence. We do this by examining the statistics of the near-zone field scattered from an aperture in a perfect electric conductor plane-a structure that does not support surface plasmons. We derive the near-field statistics (in particular, cross-spectral density functions) by applying electromagnetic equivalence theorems and the Method of Moments. We find, even in the absence of surface plasmons, that near-field physics can affect the coherence of the scattered field. The analysis and findings presented herein complement the existing coherence-related surface plasmons literature, and could find use in the design of photonic devices built to engineer spatial coherence.

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Broadband circularly-polarized infrared emission from multilayer metamaterials

Cited by 38 publications

References 42 publications

Selective emitters for thermophotovoltaic applications

Selective emitters for thermophotovoltaic applications

Probing the dynamical behavior of surface dipoles through energy-absorption interferometry

Near-field effects on partially coherent light scattered by an aperture

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