Academic Journal
Strongly enhanced light trapping in a two-dimensional silicon nanowire random fractal array
| العنوان: | Strongly enhanced light trapping in a two-dimensional silicon nanowire random fractal array |
|---|---|
| المؤلفون: | Fazio, B, Artoni, P., Iat, M. A., D'Andrea, C, Lo Faro, M. J., Del Sorbo, S., Pirotta, S., Gucciardi, P. G., Musumeci, P., Vasi, C. S., SAIJA, Rosalba, Galli, M., Priolo, F., Irrera, A. |
| المساهمون: | Fazio, B, Artoni, P., Iat, M. A., D'Andrea, C, Lo Faro, M. J., Del Sorbo, S., Pirotta, S., Gucciardi, P. G., Musumeci, P., Vasi, C. S., Saija, Rosalba, Galli, M., Priolo, F., Irrera, A. |
| سنة النشر: | 2016 |
| المجموعة: | Università degli Studi di Messina: IRIS |
| مصطلحات موضوعية: | Fractal, Multiple scattering, Nanowire, Optical propertie, Reflection, Silicon, Enhanced Raman scattering, Light-trapping, Photonic application, Raman enhancement, Random fractal, Refractive index fluctuation, Silicon nanowire, Two-dimensional arrays, Refractive index, light trapping, silicon nanowires |
| الوصف: | We report on the unconventional optical properties exhibited by a two-dimensional array of thin Si nanowires arranged in a random fractal geometry and fabricated using an inexpensive, fast and maskless process compatible with Si technology. The structure allows for a high light-trapping efficiency across the entire visible range, attaining total reflectance values as low as 0.1% when the wavelength in the medium matches the length scale of maximum heterogeneity in the system. We show that the random fractal structure of our nanowire array is responsible for a strong in-plane multiple scattering, which is related to the material refractive index fluctuations and leads to a greatly enhanced Raman scattering and a bright photoluminescence. These strong emissions are correlated on all length scales according to the refractive index fluctuations. The relevance and the perspectives of the reported results are discussed as promising for Si-based photovoltaic and photonic applications. © 2016 CIOMP. |
| نوع الوثيقة: | article in journal/newspaper |
| وصف الملف: | STAMPA |
| اللغة: | English |
| Relation: | info:eu-repo/semantics/altIdentifier/wos/WOS:000374740100004; volume:5; firstpage:1; lastpage:7; numberofpages:7; journal:LIGHT, SCIENCE & APPLICATIONS; http://hdl.handle.net/11570/3096052; info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-84964045806; https://www.nature.com/articles/lsa201662 |
| DOI: | 10.1038/lsa.2016.62 |
| الاتاحة: | http://hdl.handle.net/11570/3096052 https://doi.org/10.1038/lsa.2016.62 https://www.nature.com/articles/lsa201662 |
| Rights: | info:eu-repo/semantics/openAccess |
| رقم الانضمام: | edsbas.269A9C5F |
| قاعدة البيانات: | BASE |
| DOI: | 10.1038/lsa.2016.62 |
|---|