Thermal hyperbolic metamaterials

Guo, Yu; Jacob, Zubin

doi:10.1364/oe.21.015014

Cited by 174 publications

(136 citation statements)

References 31 publications

Supporting

Mentioning

136

Contrasting

Order By: Relevance

“…In this paper, we show that, upon homogenization of a MM, using for example methods like those in [13], the utilization of the general dispersion equations for uniaxially anisotropic materials enables us to retrieve global effective permittivities and permeabilities along all coordinate directions, that satisfy the effective material parameter criteria mentioned above. It is important to note that, unlike the approaches taken by previous researchers 7,10,11,[20][21][22][23][24][25] , we do not assume, a priori, a unity magnetic permeability along all symmetry directions. Instead, we use the general dispersion relations for magnetic uniaxial slabs to retrieve an effective permeability tensor, in addition to the effective permittivity tensor.…”

Section: Introductionmentioning

confidence: 93%

See 1 more Smart Citation

Retrieval of material parameters for uniaxial metamaterials

2015

View full text Add to dashboard Cite

We present a general method for retrieving the effective tensorial permittivity of uniaxially anisotropic metamaterials. By relaxing the usually-imposed constraint of assuming non-magnetic metal/dielectric metamaterials, we also retrieve the effective permeability tensor and show that multilayer hyperbolic metamaterials exhibit a strong and broadband diamagnetic response in the visible regime. The method provides the means for designing magnetically anisotropic metamaterials for studying magnetic topological transitions in the visible regime. We obtain orientation-independent effective material parameters, which are distinguishable from mere wave parameters. We analytically validate this method for Ag/SiO 2 planar metamaterials with a varying number of layers and filling fractions, and compare to the results from effective medium theory and Bloch theory. KeywordsEffective medium theory, transfer matrix, uniaxial anisotropy, hyperbolic metamaterials (HMM), isofrequency contour, density of optical states

show abstract

Section: Introductionmentioning

confidence: 93%

“…Instead, we use the general dispersion relations for magnetic uniaxial slabs to retrieve an effective permeability tensor, in addition to the effective permittivity tensor. Until now, metal/dielectric HMMs have been assumed to be non-magnetic 7,10,11,[20][21][22][23][24][25] at optical frequencies. We…”

Section: Introductionmentioning

confidence: 99%

Retrieval of material parameters for uniaxial metamaterials

2015

View full text Add to dashboard Cite

show abstract

“…Similarly, properly designed thin film emitters and receivers give rise to thermal analogs to quantum wells [110], known as 'thermal wells', which may improve power conversion efficiency. Finally, refractory hyperbolic metamaterials (HMM) [111] are good candidates for near-field thermal energy transfer. HMMs can be realized in either a multilayer structure of alternating subwavelength metallic and dielectric layers, or in a metallic nanowire structure embedded in a dielectric medium.…”

Section: Near-field Tpvmentioning

confidence: 99%

Solar thermophotovoltaics: reshaping the solar spectrum

et al. 2016

View full text Add to dashboard Cite

Abstract:Recently, there has been increasing interest in utilizing solar thermophotovoltaics (STPV) to convert sunlight into electricity, given their potential to exceed the Shockley-Queisser limit. Encouragingly, there have also been several recent demonstrations of improved systemlevel efficiency as high as 6.2%. In this work, we review prior work in the field, with particular emphasis on the role of several key principles in their experimental operation, performance, and reliability. In particular, for the problem of designing selective solar absorbers, we consider the trade-off between solar absorption and thermal losses, particularly radiative and convective mechanisms. For the selective thermal emitters, we consider the tradeoff between emission at critical wavelengths and parasitic losses. Then for the thermophotovoltaic (TPV) diodes, we consider the trade-off between increasing the potential short-circuit current, and maintaining a reasonable opencircuit voltage. This treatment parallels the historic development of the field, but also connects early insights with recent developments in adjacent fields. With these various components connecting in multiple ways, a system-level end-to-end modeling approach is necessary for a comprehensive understanding and appropriate improvement of STPV systems. This approach will ultimately allow researchers to design STPV systems capable of exceeding recently demonstrated efficiency values.

show abstract

“…8,[11][12][13][14][15] Compared with metals, the loss of the ICs is much lower in the interesting frequency range, supporting SPhPs to propagate a much longer distance at the crystal surface. 11 We all know that there is a SPhP in the restrahlen band of the ICs 16 and name it the traditional SPhP here.…”

Section: Introductionmentioning

confidence: 99%

Rich hybridized-polarization surface phonon polaritons in hyperbolic metamaterials

Zhang

Zhou

et al. 2017

AIP Advances

View full text Add to dashboard Cite

We investigated hybridized-polarization surface phonon polaritons (HSPhPs) of transversely truncated a metamaterial (MM) that consists of alternating ionic-crystal and ordinary-dielectric layers. We predicted five HSPhPs in the reststrahlen frequency window of ionic-crystal layers, which belong to five different types, respectively. One is of Dyakonov-like type and another is traditional-like. The other three HSPhPs are of new type. We used a numerical-simulating method of attenuated total reflection (ATR) measurements to examine them. The obtained ATR spectra also demonstrate that they are observable and exhibit their polarization features. These results expand the potential-application space of phononics and photonics in the infrared to the terahertz range.

show abstract

Thermal hyperbolic metamaterials

Cited by 174 publications

References 31 publications

Retrieval of material parameters for uniaxial metamaterials

Retrieval of material parameters for uniaxial metamaterials

Solar thermophotovoltaics: reshaping the solar spectrum

Rich hybridized-polarization surface phonon polaritons in hyperbolic metamaterials

Contact Info

Product

Resources

About