Thermal hysteresis in scattering by VO2 spheres.
Thermal hysteresis in scattering by VO2 spheres.
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DOI：
10.1364/josaa.463159
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发表时间：
2022-07
期刊：
影响因子：
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通讯作者：
A. Lakhtakia;T. Mackay;Waleed Iqbal Waseer
中科院分区：
文献类型：
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作者：
A. Lakhtakia;T. Mackay;Waleed Iqbal Waseer
当从58°C加热到72°C时，二氧化钒（VO 2）从纯单斜晶转变为纯四斜晶，并且该转变是可逆的但滞后的。当自由空间波长为λ 01100 nm时，VO 2从一种耗散介质转变为另一种耗散介质。计算了VO 2球的消光、总散射、吸收、辐射压、后向散射和前向散射效率，发现在λ 01100 nm的前向散射、后向散射和吸收效率中存在明显的热滞后现象。真空和零介电常数准态发生在58°C和72°C之间，当四氢VO 2是等离子体金属时，一次在热滞后的加热分支上，一次在冷却分支上。但是，这六个效率都没有显示出两个准态之间的显着差异。
Vanadium dioxide (VO2) transforms from purely monoclinic to purely tetragonal when heated from 58°C to 72°C, and the transformation is reversible but hysteretic. Electromagnetically, VO2 transforms from a dissipative dielectric to another dissipative dielectric if the free-space wavelength is λ01100nm. Calculating the extinction, total scattering, absorption, radiation pressure, backscattering and forward-scattering efficiencies of a VO2 sphere, we found clear signatures of thermal hysteresis in (i) the forward-scattering, backscattering, and absorption efficiencies for λ01100nm. Vacuum and null-permittivity quasistates occur between 58°C and 72°C, when tetragonal VO2 is a plasmonic metal, once each on the heating branch and once each on the cooling branch of thermal hysteresis. But none of the six efficiencies show significant differences between the two quasistates.