Abstract：
:Low-losses and directionality effects exhibited by High Refractive Index Dielectric particles make them attractive for applications where radiation direction control is relevant. For instance, isolated metallo-dielectric core-shell particles or aggregates (dimers) of High Refractive Index Dielectric particles have been proposed for building operational switching devices. Also, the possibility of using isolated High Refractive Index Dielectric particles for optimizing solar cells performance has been explored. Here, we present experimental evidence in the microwave range, that a High Refractive Index Dielectric dimer of spherical particles is more efficient for redirecting the incident radiation in the forward direction than the isolated case. In fact, we report two spectral regions in the dipolar spectral range where the incident intensity is mostly scattered in the forward direction. They correspond to the Zero-Backward condition (also observed for isolated particles) and to a new condition, denoted as "near Zero-Backward" condition, which comes from the interaction effects between the particles. The proposed configuration has implications in solar energy harvesting devices and in radiation guiding.
journal_name
Sci Repjournal_title
Scientific reportsauthors
Barreda ÁI,Saleh H,Litman A,González F,Geffrin JM,Moreno Fdoi
10.1038/s41598-018-26359-8subject
Has Abstractpub_date
2018-05-22 00:00:00pages
7976issue
1issn
2045-2322pii
10.1038/s41598-018-26359-8journal_volume
8pub_type
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