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Strong Omnidirectional and Broadband Absorption of the Solar Light with Arrays of Submicrometer-Scaled Compound Parabolic Light Concentrators

机译:带有亚微米复合抛物线镜片阵列的太阳灯的强大的全向和宽带吸收

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摘要

Efficient omnidirectional broadband absorption is important to various applicationsinvolving the harvest of the solar spectrum. The optical absorptiondependency on oblique illumination in arrays of submicrometer-scaled compoundparabolic concentrators (CPCs) is examined. For a non-optimized CPC array, thebroadband absorption is ≈30% higher than that of a nanopillar (NP) array thatis corrected for the absorption of the solar light for an angle-of-illumination rangeof 0°-80°. It is shown that enhanced absorptivity of CPC arrays, relative to theoptically corrected NP array, is due to the repressed transmission for bothtransverse electric and transverse magnetic illumination. It is determined thatthe superior omnidirectional broadband absorption of a CPC array is due to strong“light bending”; in the CPC array, the optical intensity is predominantly distributedlaterally, whereas in the NP array, the optical intensity is mainly directed inthe vertical direction. It is shown that for the CPC array, the intensity lateralcomponents are up to 80% higher than the lateral components in the NP array.Finally, the CPC array omnidirectional broadband absorption is governed bysubstantial light bending, which induces competent excitation of variousasymmetric photonic states.
机译:高效的全向宽带吸收对各种应用很重要涉及太阳光谱的收获。光学吸收依赖亚尺度尺度复合阵列中的倾斜照明检查抛物型聚光器(CPC)。对于非优化的CPC阵列,宽带吸收比纳米柱(NP)阵列的更高≈30%校正太阳灯对照明范围的吸收0°-80°。结果表明,相对于CPC阵列的吸收率增强了光学校正的NP阵列,是由于两者的压抑传输横向电气和横向磁力照射。确定CPC阵列的卓越的全向宽带吸收是由于强大的“轻弯曲”;在CPC阵列中,光学强度主要分布横向,而在NP阵列中,光学强度主要有意垂直方向。结果表明,对于CPC阵列,强度横向组件比NP阵列中的横向组件高达80%。最后,CPC阵列全向宽带吸收由大量的轻弯曲,诱导各种兴奋的激发不对称的光子状态。

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  • 来源
    《Solar RRL》 |2020年第12期|2000561.1-2000561.7|共7页
  • 作者单位

    School of Electrical & Computer EngineeringBen-Gurion University of the NegevPOB 653 Beer-Sheva 8410501 Israel;

    School of Electrical & Computer EngineeringBen-Gurion University of the NegevPOB 653 Beer-Sheva 8410501 Israel;

    School of Electrical & Computer EngineeringBen-Gurion University of the NegevPOB 653 Beer-Sheva 8410501 Israel;

    School of Electrical & Computer EngineeringBen-Gurion University of the NegevPOB 653 Beer-Sheva 8410501 Israel The Ilse-Katz Institute for Nanoscale Science & TechnologyBen-Gurion University of the NegevPOB 653 Beer-Sheva 8410501 Israel;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    compound parabolic concentrators; light trapping; nanopillar arrays; omnidirectional broadband absorption; photon management;

    机译:复合抛物型浓缩器;轻陷阱;纳米玻璃阵列;全向宽带吸收;光子管理;

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