| Autor: |
Benzaouia, M., Tokic, G., Miller, O. D., Yue, D. K. P., Johnson, S. G. |
| Rok vydání: |
2018 |
| Předmět: |
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| Zdroj: |
Phys. Rev. Applied 11, 034033 (2019) |
| Druh dokumentu: |
Working Paper |
| DOI: |
10.1103/PhysRevApplied.11.034033 |
| Popis: |
In this paper, we develop an approximate wide-bandwidth upper bound to the absorption enhancement in arrays of metaparticles, applicable to general wave-scattering problems and motivated here by ocean-buoy energy extraction. We show that general limits, including the well-known Yablonovitch result in solar cells, arise from reciprocity conditions. The use of reciprocity in the stochastic regime leads us to a corrected diffusion model from which we derive our main result: an analytical prediction of optimal array absorption that closely matches exact simulations for both random and optimized arrays under angle/frequency averaging. This result also enables us to propose and quantify approaches to increase performance through careful particle design and/or using external reflectors. We show in particular that the use of membranes on the water's surface allows substantial enhancement. |
| Databáze: |
arXiv |
| Externí odkaz: |
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