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超级老快木虫之王 (文学泰斗)
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[求助]
求汉译英一段话，谢谢大家！
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| 金属表面等离子体增强光吸收主要有三种机理: (1)金属颗粒的散射:当金属颗粒介于两种介质界面处时,光倾向于向介电常数较大的一侧散射,散射光将会具有一定的角分布,有效的增大光的路径。而且,光散射角超过了反射临界角时,也可以被太阳能电池捕获。另外,如果电池有金属背电极反射层,反射到表面的光与金属颗粒親合,再次散射到底部,这样,入射光将在半导体中经过多次散射,增大了光的有效路径,从而增强吸收;(2)局域表面等离子体的场增强效应:金属纳米颗粒作为一种纳米天线将入射光的能量局域在金属颗粒表面,这种增强的电磁场可以提高电池的吸收效率。(3)SPPs模增强光吸收:在金属背电极和半导体之间设置一层周期性金属光栅结构,在满足共振频率的入射光激发下产生SPPs , SPPs能够有效的捕获光并在半导体层内传导。 |
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genhunter
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超级老快: 金币+100, ★★★★★最佳答案 2016-12-07 08:00:38
超级老快: 金币+100, ★★★★★最佳答案 2016-12-07 08:00:38
| There are three main mechanisms to explain the phenomenon of enhanced light absorption by metal surface plasmon: 1) light scattered by metal particles occurs when light travels through two phases, it tends to lean towards the one with high dielectric constant, or the side near the interface that has metal particles, scattered light enters in an angular distribution , which increases the effective light path, and if the light scattering angle is greater than a critical reflection angle, the light can be captured by solar cell. In addition, if there is a metal electrode at the back of the battery that acts as a reflector , the light is sent back to the surface where it starts another round of scattering with metal particles and bounce back again. By doing so, incoming light travels through semiconductor multiple times, significantly increases the effective light path and hence increases the absorption. 2) The field enhancement effect from localized surface plasmon: metal nanoparticles act as nanoantenna and channel the energy from incoming light towards localized metal surface, which results in enhanced electromagnetic field, and increases the energy absorption efficiency. 3) Light absorption enhanced by SPPs template: A layer of metal grating with a periodic structures inserted between the metal backing and the semiconductor, when irradiated with an incoming light with a frequency that can satisfy its resonance frequency, can be excited to produce SPPs, which can effectively capture light and transmit it within the semiconductor layer. |
2楼2016-12-07 07:39:10