Tunable narrow-band near-field thermal emitters based on resonant metamaterials

Li, Jiayu; Liu, Baoan

doi:10.1103/physrevb.96.075413

Cited by 20 publications

(9 citation statements)

References 57 publications

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“…Multilayer thermal metamaterial designs have also experimentally demonstrated that thermal radiation can be controlled by engineering the optical topological transition [2]. Such advances in thermal radiation control can impact a variety of commercial applications such as coherent infrared sources [5,4,15,16], thermophotovoltaics [9,13,17,18,11], radiative cooling [19,20], temperature sensors, gas sensors [21], nanoscale heat transfer [22,23,24,25] and general thermal management.…”

Section: Introductionmentioning

confidence: 99%

Dual-band quasi-coherent radiative thermal source

Starko‐Bowes

Dai

Newman

et al. 2018

Journal of Quantitative Spectroscopy and Radiative Transfer

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Thermal radiation from an unpatterned object is similar to that of a gray body.The thermal emission is insensitive to polarization, shows only Lambertian angular dependence, and is well modeled as the product of the blackbody distribution and a scalar emissivity over large frequency bands. Here, we design, fabricate and experimentally characterize the spectral, polarization, angular and temperature dependence of a microstructured SiC dual band thermal infrared source; achieving independent control of the frequency and polarization of thermal radiation in two spectral bands. The measured emission of the device in the Reststrahlen band (10.3-12.7 µm) selectively approaches that of a blackbody, peaking at an emissivity of 0.85 at λ x = 11.75 µm and 0.81 at λ y = 12.25 µm.This effect arises due to the thermally excited phonon polaritons in silicon carbide. The control of thermal emission properties exhibited by the design is well suited for applications requiring infrared sources, gas or temperature sensors and nanoscale heat transfer. Our work paves the way for future silicon carbide based thermal metasurfaces.

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Section: Introductionmentioning

confidence: 99%

Dual-band quasi-coherent radiative thermal source

Starko‐Bowes

Dai

Newman

et al. 2018

Journal of Quantitative Spectroscopy and Radiative Transfer

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“…The GNRs are embedded in alumina with two different spacings, 200 and 400 nm. The direct simulation of thermal emission from the GNRs is conducted based on the Wiener‐chaos expansion (WCE) method [ 34,35 ] using the finite‐different time‐domain (FDTD) calculation, where we put a set of dipole source arrays inside the GNRs to mimic the thermally excited current density. The position, intensity and polarization of the dipole sources inside the GNRs are carefully designed such that different sets of dipole sources are orthogonal to each other, which manifests the incoherence nature of thermal sources.…”

Section: Theory Of Mode Hybridization In a Gold Nanorod Arraymentioning

confidence: 99%

Fiber Coupled Near‐Field Thermoplasmonic Emission from Gold Nanorods at 1100 K

Wuenschell

et al. 2021

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Nanostructured gold has attracted significant interest from materials science, chemistry, optics and photonics, and biology due to their extraordinary potential for manipulating visible and near‐infrared light through the excitation of plasmon resonances. However, gold nanostructures are rarely measured experimentally in their plasmonic properties and hardly used for high‐temperature applications because of the inherent instability in mass and shape due to the high surface energy at elevated temperatures. In this work, the first direct observation of thermally excited surface plasmons in gold nanorods at 1100 K is demonstrated. By coupling with an optical fiber in the near‐field, the thermally excited surface plasmons from gold nanorods can be converted into the propagating modes in the optical fiber and experimentally characterized in a remote manner. This fiber‐coupled technique can effectively characterize the near‐field thermoplasmonic emission from gold nanorods. A direct simulation scheme is also developed to quantitively understand the thermal emission from the array of gold nanorods. The experimental work in conjunction with the direct simulation results paves the way of using gold nanostructures as high‐temperature plasmonic nanomaterials, which has important implications in thermal energy conversion, thermal emission control, and chemical sensing.

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“…Second, the emitter-fiber system can be easily fabricated in practice. Here, we experimentally measure the thermal emission spectrum of ITO thin films doped by H 2 gas with different concentrations and compare the measurement results with the direct simulations from the WCE method 9 .…”

Section: Experimental Demonstration Of the Thermal Emission Extrmentioning

confidence: 99%

“…Thermal radiation plays an increasingly important role in many applications such as radiative cooling 1,2 , gas sensing 3 , and thermal management 4,5 . While technology development for the spectral and directional control of thermal radiation becomes more and more sophisticated in recent years [6][7][8][9][10][11][12] , the intensity of the thermal radiation in the far field is still tightly confined by the blackbody radiation limit. To address this challenge, significant efforts have been taken to utilize the near-field thermal radiation where the energy density of electromagnetic waves can be orders of magnitude larger than that in the far field due to the contribution from evanescent waves [13][14][15][16][17][18][19][20][21][22][23] .…”

Section: Introductionmentioning

confidence: 99%

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Spectral near-field thermal emission extraction by optical waveguides

Wuenschell

Jee

et al. 2019

Phys. Rev. B

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As the far-field thermal emission is limited by the blackbody radiation, the significant enhancement of thermal radiation in the near-field plays a vital role in a variety of applications such as infrared sensing, radiation cooling and thermophotovoltaics. Yet the techniques of exporting the near-field signal to the far-field are still not mature, typically relying on complex instrumentation capable of being applied only to the surfaces of model systems and structures. Here we develop an efficient method of extracting near-field thermal radiation to the far-field by integrating a nanoscale thermal emitter with a high-index optical waveguide. By directly depositing the emitter onto the optical waveguide, it requires no vacuum gap and enables efficient coupling of near-field thermal radiation into propagating waveguided modes. A single-2 mode planar waveguide incorporated with an ITO film as a thermal emitter is theoretically investigated to prove the feasibility of thermal extraction. Wiener-chaos expansion (WCE) method is applied to directly calculate the thermal radiation from the emitter-waveguide system. We experimentally demonstrate the fidelity of the optical-waveguide-assisted near-field thermal extraction by measuring the emission spectrum of an ITO-coated optical fiber and comparing with theoretical predictions. Our experimental demonstration in conjunction with the direct simulation paves the way for effectively extracting near-field thermal radiation with applications in chemical sensing, infrared imaging, and near-field thermal energy management.

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Tunable narrow-band near-field thermal emitters based on resonant metamaterials

Cited by 20 publications

References 57 publications

Dual-band quasi-coherent radiative thermal source

Dual-band quasi-coherent radiative thermal source

Fiber Coupled Near‐Field Thermoplasmonic Emission from Gold Nanorods at 1100 K

Spectral near-field thermal emission extraction by optical waveguides

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