scholarly journals High Surface Phonon-Polariton in-Plane Thermal Conductance along Coupled Films

Nanomaterials ◽  
2020 ◽  
Vol 10 (7) ◽  
pp. 1383
Author(s):  
Saeko Tachikawa ◽  
Jose Ordonez-Miranda ◽  
Yunhui Wu ◽  
Laurent Jalabert ◽  
Roman Anufriev ◽  
...  
Keyword(s):  
Electromagnetic Waves ◽  
Mechanical Stability ◽  
Layer Structure ◽  
High Surface ◽  
Thermal Conductance ◽  
Sio2 Film ◽  
Surface Phonon ◽  
Surface Phonon Polaritons ◽  
Surface Phonon Polariton ◽  
Heat Carriers

Surface phonon-polaritons (SPhPs) are evanescent electromagnetic waves that can propagate distances orders of magnitude longer than the typical mean free paths of phonons and electrons. Therefore, they are expected to be powerful heat carriers capable of significantly enhancing the in-plane thermal conductance of polar nanostructures. In this work, we show that a SiO2/Si (10 μm thick)/SiO2 layered structure efficiently enhances the SPhP heat transport, such that its in-plane thermal conductance is ten times higher than the corresponding one of a single SiO2 film, due to the coupling of SPhPs propagating along both of its polar SiO2 nanolayers. The obtained results thus show that the proposed three-layer structure can outperform the in-plane thermal performance of a single suspended film while improving significantly its mechanical stability.

Thermal Conductance of a Surface Phonon-Polariton Crystal Made up of Polar Nanorods

2017 ◽  
Vol 72 (2) ◽  
pp. 135-139 ◽  
Author(s):  
Jose Ordonez-Miranda ◽  
Karl Joulain ◽  
Younes Ezzahri
Keyword(s):  
Energy Transport ◽  
High Surface ◽  
High Surface Area ◽  
Three Dimensional ◽  
Thermal Conductance ◽  
Volume Ratio ◽  
Phonon Thermal Conductivity ◽  
Propagation Length ◽  
Surface Phonon ◽  
Surface Phonon Polariton

AbstractWe demonstrate that the energy transport of surface phonon-polaritons can be large enough to be observable in a crystal made up of a three-dimensional assembly of nanorods of silicon carbide. The ultralow phonon thermal conductivity of this nanostructure along with its high surface area-to-volume ratio allows the predominance of the polariton energy over that generated by phonons. The dispersion relation, propagation length, and thermal conductance of polaritons are numerically determined as functions of the radius and temperature of the nanorods. It is shown that the thermal conductance of a crystal with nanorods at 500 K and diameter (length) of 200 nm (20 μm) is 0.55 nW·K−1, which is comparable to the quantum of thermal conductance of polar nanowires.

scholarly journals Quantum of thermal conductance of nanofilms due to surface-phonon polaritons

2021 ◽  
Vol 104 (20) ◽  
Author(s):  
Yangyu Guo ◽  
Saeko Tachikawa ◽  
Sebastian Volz ◽  
Masahiro Nomura ◽  
Jose Ordonez-Miranda
Keyword(s):  
Thermal Conductance ◽  
Surface Phonon ◽  
Surface Phonon Polaritons ◽  
Phonon Polaritons

scholarly journals Quantized Thermal Conductance of Nanowires at Room Temperature Due to Zenneck Surface-Phonon Polaritons

2014 ◽  
Vol 112 (5) ◽  
Author(s):  
José Ordonez-Miranda ◽  
Laurent Tranchant ◽  
Beomjoon Kim ◽  
Yann Chalopin ◽  
Thomas Antoni ◽  
...  
Keyword(s):  
Room Temperature ◽  
Thermal Conductance ◽  
Surface Phonon ◽  
Surface Phonon Polaritons ◽  
Phonon Polaritons

scholarly journals Low-loss, infrared and terahertz nanophotonics using surface phonon polaritons

Nanophotonics ◽  
2015 ◽  
Vol 4 (1) ◽  
pp. 44-68 ◽  
Author(s):  
Joshua D. Caldwell ◽  
Lucas Lindsay ◽  
Vincenzo Giannini ◽  
Igor Vurgaftman ◽  
Thomas L. Reinecke ◽  
...  
Keyword(s):  
Optical Losses ◽  
General Phenomenon ◽  
Low Loss ◽  
Mid Infrared ◽  
New Developments ◽  
Polar Dielectric ◽  
Surface Phonon ◽  
Surface Phonon Polaritons ◽  
Surface Phonon Polariton ◽  
Spectral Ranges

AbstractThe excitation of surface-phonon-polariton (SPhP) modes in polar dielectric crystals and the associated new developments in the field of SPhPs are reviewed. The emphasis of this work is on providing an understanding of the general phenomenon, including the origin of the Reststrahlen band, the role that optical phonons in polar dielectric lattices play in supporting sub-diffraction-limited modes and how the relatively long optical phonon lifetimes can lead to the low optical losses observed within these materials. Based on this overview, the achievements attained to date and the potential technological advantages of these materials are discussed for localized modes in nanostructures, propagating modes on surfaces and in waveguides and novel metamaterial designs, with the goal of realizing low-loss nanophotonics and metamaterials in the mid-infrared to terahertz spectral ranges.

PROVING SURFACE PHONON POLARITONS CONTRIBUTION TO THERMAL CONDUCTIVITY IN SIN SUBMICRON FILMS

2018 ◽  
Author(s):  
Yunhui Wu ◽  
Roman Anufriev ◽  
Sergei Gluchko ◽  
Ryoto Yanagisawa ◽  
Laurent Tranchant ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Surface Phonon ◽  
Surface Phonon Polaritons ◽  
Phonon Polaritons

Facile Synthesis of Cu2O nanoparticle-loaded Carbon Nanotubes Composite Catalysts for Reduction of 4-Nitrophenol

2020 ◽  
Vol 16 (4) ◽  
pp. 617-624 ◽  
Author(s):  
Yao Feng ◽  
Ran Wang ◽  
Juanjuan Yin ◽  
Fangke Zhan ◽  
Kaiyue Chen ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Mechanical Stability ◽  
Catalytic Reduction ◽  
High Surface ◽  
High Surface Area ◽  
Reduction Reaction ◽  
Cycle Performance ◽  
Simple Method ◽  
Composite Catalysts ◽  
Cu2o Nanoparticles

Background: 4-nitrophenol (4-NP) is one of the pollutants in sewage and harmful to human health and the environment. Cu is a non-noble metal with catalytic reduction effect on nitro compounds, and.has the advantages of simple preparation, abundant reserves, and low price. Carbon nanotubes (CNT) are widely used for substrate due to their excellent mechanical stability and high surface area. In this study, a simple method to prepare CNT-Cu2O by controlling different reaction time was reported. The prepared nanocomposites were used to catalyze 4-NP. Methods: CNTs and CuCl2 solution were put into a beaker, and then ascorbic acid and NaOH were added while continuously stirring. The reaction was carried out for a sufficiently long period of time at 60°C. The prepared samples were dried in a vacuum at 50°C for 48 h after washing with ethyl alcohol and deionized water. Results: Nanostructures of these composites were characterized by scanning electron microscope and transmission electron microscopy techniques, and the results at a magnification of 200 nanometers showed that Cu2O was distributed on the surface of the CNTs. In addition, X-ray diffraction was performed to further confirm the formation of Cu2O nanoparticles. The results of ultraviolet spectrophotometry showed that the catalytic effect of the compound on 4-NP was obvious. Conclusions: CNTs acted as a huge template for loading Cu2O nanoparticles, which could improve the stability and cycle performance of Cu2O. The formation of nanoparticles was greatly affected by temperature and the appropriate concentration, showing great reducibility for the 4-NP reduction reaction.

Influence of force constant on surface phonon polariton properties of cubic ZnS1−xSex crystals

2015 ◽  
Author(s):  
P. Yew ◽  
S. C. Lee ◽  
S. S. Ng ◽  
T. L. Yoon ◽  
H. Abu. Hassan
Keyword(s):  
Force Constant ◽  
Surface Phonon ◽  
Surface Phonon Polariton

Temperature dependence of surface phonon polaritons from a quartz grating

2011 ◽  
Vol 110 (4) ◽  
pp. 043517 ◽  
Author(s):  
Andrew K. Hafeli ◽  
Eden Rephaeli ◽  
Shanhui Fan ◽  
David G. Cahill ◽  
Thomas E. Tiwald
Keyword(s):  
Temperature Dependence ◽  
Surface Phonon ◽  
Surface Phonon Polaritons ◽  
Phonon Polaritons

Infrared surface phonon polariton waveguides on SiC Substrate

2015 ◽  
Author(s):  
Yuchen Yang ◽  
Franklin M. Manene ◽  
Brian A. Lail
Keyword(s):  
Surface Phonon ◽  
Surface Phonon Polariton
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