Optical Circular Conversion Dichroism via Heterogeneous Planar Nanoplasmonic Metasurface
| العنوان: | Optical Circular Conversion Dichroism via Heterogeneous Planar Nanoplasmonic Metasurface |
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| المؤلفون: | Tavakol Pakizeh, Atefe Fazel Najafabadi |
| المصدر: | Plasmonics. 13:1721-1728 |
| بيانات النشر: | Springer Science and Business Media LLC, 2018. |
| سنة النشر: | 2018 |
| مصطلحات موضوعية: | Circular dichroism, Materials science, business.industry, Biophysics, 02 engineering and technology, Dichroism, 021001 nanoscience & nanotechnology, 01 natural sciences, Biochemistry, Phase lag, 010309 optics, Planar, 0103 physical sciences, Optoelectronics, Nanorod, Photonics, 0210 nano-technology, Chirality (chemistry), business, Mirror symmetry, Biotechnology |
| الوصف: | Chirality as a physical phenomenon originating from lacking mirror symmetry in many natural substances exposes fascinating optical activities, including circular dichroism (CD) and optical circular conversion dichroism (O-CCD). While naturally occurring chiroptical properties are negligible in real substances, boosting these properties to significant levels is one of the main challenges for designing functional photonic and optoelectronic devices. Here, we introduce a new paradigm for the realization of planar metasurfaces with substantial O-CCD, reporting that considerable chiral effects of three-dimensional chiral structure are practically provided by feasible metasurfaces by picking out nanooscillators with strong near-field interaction, different optical properties including loss and radiation, and high overlap between their spectral positions. We apply this concept to heterogeneous nanoplasmonic structures, composed of L-pair of Au–Ag nanorods, as archetypical configurations for substantially raising dichroism compared to materially homogenous ones, i.e., Au–Au and Ag–Ag pairs with different length, respectively. The essential prerequisite for phase lag associated with the third dimension along lightwave propagation is compensated by proposed heterogeneity in metasurface design. Theoretical findings based on the simple hybridization model are adequately supported by the computational results. |
| تدمد: | 1557-1963 1557-1955 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::696988e6970eaa32b2760703aaa31fb9 https://doi.org/10.1007/s11468-017-0684-0 |
| حقوق: | CLOSED |
| رقم الأكسشن: | edsair.doi...........696988e6970eaa32b2760703aaa31fb9 |
| قاعدة البيانات: | OpenAIRE |
Find this article in full text from Springer Verlag. | تدمد: | 15571963 15571955 |
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