Journal
SCIENTIFIC REPORTS
Volume 8, Issue -, Pages -Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/s41598-018-24492-y
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Funding
- Russian Science Foundation [17-19-01637]
- Ministry of Education and Science of Russian Federation [14.Y26.31.0010]
- Knut and Alice Wallenberg foundation
- Junta de Andalucia (Spain)
- European Union Seventh Framework Programme [267226]
- Alexander von Humboldt Fundation
- LOEWE project SynChemBio
- German Research Society (DFG) [PA 794/28-1]
- Russian Science Foundation [17-19-01637] Funding Source: Russian Science Foundation
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Luminescent molecules attached to resonant colloidal particles are an important tool to study light-matter interaction. A traditional approach to enhance the photoluminescence intensity of the luminescent molecules in such conjugates is to incorporate spacer-coated plasmonic nanoantennas, where the spacer prevents intense non-radiative decay of the luminescent molecules. Here, we explore the capabilities of an alternative platform for photoluminescence enhancement, which is based on low-loss Mie-resonant colloidal silicon particles. We demonstrate that resonant silicon particles of spherical shape are more efficient for photoluminescence enhancement than their plasmonic counterparts in spacer-free configuration. Our theoretical calculations show that significant enhancement originates from larger quantum yields supported by silicon particles and their resonant features. Our results prove the potential of high-index dielectric particles for spacer-free enhancement of photoluminescence, which potentially could be a future platform for bioimaging and nanolasers.
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