Transition Layer Effect on Thermal Radiative Near Field Mode Emission

2005 ◽  
Author(s):  
S. Ghassemi ◽  
J. S. Hammonds
Keyword(s):  
Near Field ◽  
Spectral Characteristics ◽  
Active Material ◽  
Film Surface ◽  
Radiative Properties ◽  
Impedance Boundary Condition ◽  
Impedance Boundary ◽  
Surface Modes ◽  
Surface Phonon ◽  
Surface Phonon Polariton

A spectrally selective thermally emitting device is proposed which takes advantage of near-field surface phonon polariton modes. Surface phonon polariton modes are usually restricted to the emitter surface and do not participate in energy exchange. In this work, the possibility of obtaining desirable spectral properties by using a thin-film surface active material, layered between dielectrics, is explored. This same multilayered structure is proposed to couple the surface modes into radiative modes that can participate in energy transport. This multilayer device is studied in this paper by developing the surface phonon mode dispersion relation to identify the spectral location of the surface modes. The fluctuation-dissipation theorem and impedance boundary condition is used to theoretically describe the near-field spectral radiative properties of the multilayer geometry. The near-field radiative properties show near monochromatic spectral characteristics due to the domination of surface phonon polariton modes.

scholarly journals Near-field infrared nanospectroscopy of surface phonon-polariton resonances

2020 ◽  
Vol 2 (2) ◽  
Author(s):  
P. McArdle ◽  
D. J. Lahneman ◽  
Amlan Biswas ◽  
F. Keilmann ◽  
M. M. Qazilbash
Keyword(s):  
Near Field ◽  
Surface Phonon ◽  
Surface Phonon Polariton

Nanoscale Thermal Radiation Between Coated Spheres

2017 ◽  
Author(s):  
Braden Czapla ◽  
Arvind Narayanaswamy
Keyword(s):  
Radiative Transfer ◽  
Thermal Radiation ◽  
Near Field ◽  
Reflection Coefficients ◽  
Far Field ◽  
Surface Phonon ◽  
Surface Phonon Polariton ◽  
Silver Spheres ◽  
New Formula ◽  
Coated Spheres

In this work, we present a new formula for the near-field thermal radiative transfer between two spheres. The formula is identical for coated or uncoated spheres and captures the effect of the coatings in the effective Mie reflection coefficients of the spheres. We also numerically demonstrate that silica coated silver spheres transition from silver-like conductance in the far-field to surface phonon polariton dominated silica-like behavior in the extreme near-field.

Near-field imaging of mid-infrared surface phonon polariton propagation

2005 ◽  
Vol 87 (8) ◽  
pp. 081103 ◽  
Author(s):  
A. Huber ◽  
N. Ocelic ◽  
D. Kazantsev ◽  
R. Hillenbrand
Keyword(s):  
Near Field ◽  
Mid Infrared ◽  
Surface Phonon ◽  
Near Field Imaging ◽  
Surface Phonon Polariton ◽  
Field Imaging

Application of the factorization method to retrieve a crack from near field data

2016 ◽  
Vol 24 (5) ◽  
Author(s):  
Jun Guo ◽  
Junhao Hu ◽  
Guozheng Yan
Keyword(s):  
Inverse Problems ◽  
Field Data ◽  
Near Field ◽  
Scattering Problem ◽  
Factorization Method ◽  
Point Sources ◽  
Impedance Boundary Condition ◽  
Complex Conjugate ◽  
Inversion Algorithm ◽  
Impedance Boundary

AbstractWe consider the inverse scattering problem of determining the shape of a crack with impedance boundary condition on one side from the complex conjugate of point sources placed on a closed curve which contains the crack. The near field factorization method is established to reconstruct the crack from the measurements on the same curve. Then, we deduce an inversion algorithm and present some numerical examples to show the viability of our method. So far as we know, when the incident waves are the point sources, the near field operator cannot be directly decomposed into the form that the factorization method required. However, we overcome this difficulty with the complex conjugate of point sources which are recently used in [Inverse Problems 30 (2014), Article ID 095005], [Inverse Problems 30 (2014), Article ID 045008] for the justification of the factorization method from near field data.

Thermal Radiative Transport Enhancement via Electromagnetic Surface Modes in Microscale Spherical Regions Bounded by Silicon Carbide

2006 ◽  
Vol 129 (1) ◽  
pp. 94-97 ◽  
Author(s):  
James S. Hammonds
Keyword(s):  
Silicon Carbide ◽  
Green Function ◽  
Radiation Heat Transfer ◽  
Spherical Geometry ◽  
Interface Condition ◽  
Impedance Boundary Condition ◽  
Surface Mode ◽  
Impedance Boundary ◽  
Surface Modes ◽  
Green Function Approach

A Green function approach is used with the fluctuation-dissipation theorem to develop a qualitative theoretical model of radiation heat transfer across an evacuated microscale spherical geometry bounded by silicon carbide. The appropriate scalar Green function is presented by employing an impedance boundary condition to describe the electromagnetic spherical interface condition and thus capture the surface modes. This work shows that the spherical boundary can result in spectral conditions for surface mode excitation that depend not only on the dielectric function, but on the sphere radius as well. The surface modes are shown to enhance the radiation significantly and are attributed to surface phonon polariton modes excited at the interface, and surface modes excited by the mechanism of total internal reflection.

Modulation of electromagnetic local density of states by coupling of surface phonon-polariton

2017 ◽  
Vol 31 (06) ◽  
pp. 1750050 ◽  
Author(s):  
Yao Li ◽  
Chao-Jie Zhang ◽  
Tong-Biao Wang ◽  
Jiang-Tao Liu ◽  
Tian-Bao Yu ◽  
...  
Keyword(s):  
Radiative Heat ◽  
Local Density ◽  
Near Field ◽  
Width Ratio ◽  
Local Density Of States ◽  
Density Of State ◽  
One Dimensional ◽  
Surface Phonon ◽  
Frequency Regime ◽  
Surface Phonon Polariton

We studied the electromagnetic local density of state (EM-LDOS) near the surface of a one-dimensional multilayer structure (1DMS) alternately stacked by SiC and Si. EM-LDOS of a semi-infinite bulk appears two intrinsic peaks due to the resonance of surface phonon-polariton (SPhP) in SiC. In contrast with that of SiC bulk, SPhP can exist at the interface of SiC and Si for the 1DMS. The SPhPs from different interfaces can couple together, which can lead to a significant modulation of EM-LDOS. When the component widths of 1DMS are large, the spectrum of EM-LDOS exhibits oscillation behavior in the frequency regime larger than the resonance frequency of SPhP. While the component widths are small, due to the strong coupling of SPhPs, another peak appears in the EM-LDOS spectrum besides the two intrinsic ones. And the position of the new peak move toward high frequency when the width ratio of SiC and Si increases. The influences of distance from the surfaces and period of 1DMS on EM-LDOS have also been studied in detail. The results are helpful in studying the near-field radiative heat transfer and spontaneous emission.

scholarly journals The Mathematical Basis of the Inverse Scattering Problem for Cracks from Near-Field Data

2015 ◽  
Vol 2015 ◽  
pp. 1-8
Author(s):  
Yao Mao ◽  
Yongguang Chen ◽  
Jun Guo
Keyword(s):  
Boundary Condition ◽  
Inverse Scattering ◽  
Surface Impedance ◽  
Near Field ◽  
Scattering Problem ◽  
Acoustic Scattering ◽  
Inverse Scattering Problem ◽  
Impedance Boundary Condition ◽  
Mathematical Basis ◽  
Impedance Boundary

We consider the acoustic scattering problem from a crack which has Dirichlet boundary condition on one side and impedance boundary condition on the other side. The inverse scattering problem in this paper tries to determine the shape of the crack and the surface impedance coefficient from the near-field measurements of the scattered waves, while the source point is placed on a closed curve. We firstly establish a near-field operator and focus on the operator’s mathematical analysis. Secondly, we obtain a uniqueness theorem for the shape and surface impedance. Finally, by using the operator’s properties and modified linear sampling method, we reconstruct the shape and surface impedance.

Thermal Radiative Transport Enhancement via Surface Plasmon Polaritons in Microscale Cylindrical Regions Bounded by a Surface Active Ceramic

2005 ◽  
Author(s):  
James S. Hammonds
Keyword(s):  
Green Function ◽  
Thermal Radiation ◽  
Radiation Transport ◽  
Impedance Boundary Condition ◽  
Axial Line ◽  
Impedance Boundary ◽  
Spherical Domains ◽  
Surface Active ◽  
Surface Phonon Polariton ◽  
Green Function Approach

A Green function approach is used with the uctuation-dissipation theorem to theoretically model radiative heat transfer in microscale cylindrical geometries. The appropriate scalar Green function is presented by employing an impedance boundary condition. While z-independent elds are produced by axial line sources, it is proposed here that the qualitative results are applicable to thermal radiation within microscale spherical domains. An application of the theoretical result demonstrates the potential importance of surface phonon polariton modes in thermal radiation transport across porous surface-active ceramics.

scholarly journals Aspect-ratio driven evolution of high-order resonant modes and near-field distributions in localized surface phonon polariton nanostructures

2016 ◽  
Vol 6 (1) ◽  
Author(s):  
Chase T. Ellis ◽  
Joseph G. Tischler ◽  
Orest J. Glembocki ◽  
Francisco J. Bezares ◽  
Alexander J. Giles ◽  
...  
Keyword(s):  
Aspect Ratio ◽  
Near Field ◽  
High Order ◽  
Surface Phonon ◽  
Field Distributions ◽  
Resonant Modes ◽  
Surface Phonon Polariton
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