Wideband and wide angle thermal emitters for use as lightbulb filaments

Granier, Christopher H.; Lorenzo, Simón; Dowling, Jonathan P.; Veronis, Georgios

doi:10.1117/12.2190240

Cited by 4 publications

(4 citation statements)

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“…Our goal is to maximize the average absorptance of the structures in the visible range. We use a hybrid optimization method, which includes a micro-genetic global optimization method [14,[17][18][19][20][21][22][23] and a derivative-free local optimization method [24,25], to find the optimal thicknesses in the multilayer structures. The genetic algorithm is an iterative optimization method.…”

Section: Resultsmentioning

confidence: 99%

“…We model a structure composed of infinite slabs of material of varying aperiodic thicknesses above a semi-infinite tungsten substrate, as depicted in figure 1 [14]. Utilizing the transfermatrix method [15], we calculate the transmittance, reflectance and absorptance of the structure for both TE and TM polarized light.…”

Section: Theorymentioning

confidence: 99%

“…In this paper, we design aperiodic broadband thermal emitters in the visible wavelength range, composed of alternating layers of tungsten and air or tungsten and silicon carbide above a semi-infinite tungsten substrate, for use as lightbulb filaments [1,3,4]. We use a hybrid optimization method, consisting of a micro-genetic global optimization algorithm coupled to a local optimization algorithm, to maximize the power emitted by the structures in the visible.…”

Section: Introductionmentioning

confidence: 99%

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Optimized aperiodic broadband visible absorbers

Granier

Lorenzo

You

et al. 2017

J. Opt.

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Abstract:We present optimized aperiodic structures for use as broadband thermal incandescent emitters which are capable of increasing the emittance by nearly a factor of two over the visible wavelength range when compared to bulk tungsten. These aperiodic multilayer structures are designed with alternating layers of tungsten and air or tungsten and silicon carbide on top of a tungsten substrate. We investigate the properties of these structures for use as lightbulb filaments. We find that these structures greatly enhance the emittance over the visible wavelength range, while also increasing the overall efficiency of the bulb and could lead to a decrease in incandescent lightbulb power consumption by nearly 50%.

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Section: Resultsmentioning

confidence: 99%

Section: Theorymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Optimized aperiodic broadband visible absorbers

Granier

Lorenzo

You

et al. 2017

J. Opt.

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“…lectromagnetic wave absorbers are of great interest for the communities of both material science and physics for many decades and have many applications including solar cells, [1][2][3] plasmonic sensors, 4,5) photodetectors, 6,7) and thermal emitters. [8][9][10] Since the first publication of near 100% absorption in the terahertz region in 2008, 11) near-perfect absorbers have also been demonstrated from frequencies in the gigahertz and terahertz regions down to the frequencies of visible light. Various materials and structures have been developed to realize near-perfect absorption, including metasurfaces, 12,13) multilayer films, 14) pyramids, 15) and nanoparticles.…”

mentioning

confidence: 99%

Wide-angle broadband absorber based on one-dimensional metasurface in the visible region

Luo

Zhou

et al. 2017

Appl. Phys. Express

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A broadband absorber based on a one-dimensional metasurface is designed and characterized numerically. In this absorber, the lossless dielectric in non-noble metal nickel (Ni) grating grooves is essential, which supports strongly the localized electromagnetic modes concentrated in the nanocavity formed between two metallic walls. A high absorbance from 380 to 760 nm for either TM or TE polarization is attained. In particular, a nearly perfect absorbance (over 99%) is achieved at λ = 450 nm for TE polarization. Furthermore, the absorption in the visible region remains above 60% at incident angles up to 45° for the two polarizations.

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