{"database":"biostudies-literature","file_versions":[],"scores":null,"additional":{"omics_type":["Unknown"],"volume":["15(35)"],"submitter":["Al-Hamadani A"],"pubmed_abstract":["Hybrid dielectric-metal nanogaps offer unique properties such as enhanced local density of optical states (LDOS) and simultaneously high quantum yield and coupling efficiency, with applications in bright single-photon sources, efficient nanoLEDs and imaging spectroscopy. In this work we report on silicon-gold hybrid nanogaps, considering both silicon nanorods on a gold film and gold nanorods on a silicon surface and compare them to their purely metallic and dielectric equivalent. To obtain the necessary nanometer-scale control, a combination of colloidal lithography, metal assisted chemical etching (MACE), and layer-by-layer polyelectrolyte approach were used to construct the nanogaps. Quantum emitters were incorporated in the nanogap in the form of a CdTe quantum dot monolayer. The efficient coupling between the quantum dot monolayer and the nanogap modes results in hybrid nanogaps outperforming their homogeneous counterpart, with the gold nanorod-silicon hybrid nanogap offering the largest emission rate enhancement factor of 51. Specifically, Purcell enhancements were increased by a factor of ∼2 for silicon nanorod-gold film and ∼1.5 for gold nanorod-silicon surface nanogaps compared to purely dielectric and metallic geometries respectively. These results, supported by FDTD simulations, highlight hybrid nanogaps as cornerstones for probing light-matter-interactions under extreme optical confinement with applications such as low cost and low power consumption ultrafast LEDs for short distance on-chip and chip-to-chip communications."],"journal":["RSC advances"],"pagination":["29053-29062"],"full_dataset_link":["https://www.ebi.ac.uk/biostudies/studies/S-EPMC12377061"],"repository":["biostudies-literature"],"pubmed_title":["Tuning the spontaneous emission of CdTe quantum dots with hybrid silicon-gold nanogaps."],"pmcid":["PMC12377061"],"pubmed_authors":["Bartschmid T","Adawi AM","Al-Hamadani A","Al-Dulami A","Muravitskaya A","Bouillard JG","Menath J","Bourret GR","Vogel N"],"additional_accession":[]},"is_claimable":false,"name":"Tuning the spontaneous emission of CdTe quantum dots with hybrid silicon-gold nanogaps.","description":"Hybrid dielectric-metal nanogaps offer unique properties such as enhanced local density of optical states (LDOS) and simultaneously high quantum yield and coupling efficiency, with applications in bright single-photon sources, efficient nanoLEDs and imaging spectroscopy. In this work we report on silicon-gold hybrid nanogaps, considering both silicon nanorods on a gold film and gold nanorods on a silicon surface and compare them to their purely metallic and dielectric equivalent. To obtain the necessary nanometer-scale control, a combination of colloidal lithography, metal assisted chemical etching (MACE), and layer-by-layer polyelectrolyte approach were used to construct the nanogaps. Quantum emitters were incorporated in the nanogap in the form of a CdTe quantum dot monolayer. The efficient coupling between the quantum dot monolayer and the nanogap modes results in hybrid nanogaps outperforming their homogeneous counterpart, with the gold nanorod-silicon hybrid nanogap offering the largest emission rate enhancement factor of 51. Specifically, Purcell enhancements were increased by a factor of ∼2 for silicon nanorod-gold film and ∼1.5 for gold nanorod-silicon surface nanogaps compared to purely dielectric and metallic geometries respectively. These results, supported by FDTD simulations, highlight hybrid nanogaps as cornerstones for probing light-matter-interactions under extreme optical confinement with applications such as low cost and low power consumption ultrafast LEDs for short distance on-chip and chip-to-chip communications.","dates":{"release":"2025-01-01T00:00:00Z","publication":"2025 Aug","modification":"2026-06-01T06:27:46.698Z","creation":"2026-04-08T09:54:20.363Z"},"accession":"S-EPMC12377061","cross_references":{"pubmed":["40861991"],"doi":["10.1039/d5ra04583e"]}}