Momentum-Enabled Near-Infrared Luminescence in Silicon Decorated with Ultrasmall Gold Nanoparticles
Silicon's indirect bandgap limits near-infrared (NIR) emission, restricting its photonic applications. We report experimental evidence that ultrasmall (1.8 nm) gold nanoparticles enable momentum-assisted NIR light emission from bulk silicon. The medium provides the additional momentum necessary for indirect optical transitions through optically induced polarization currents. This leads to a new absorption edge near 950 nm and strong NIR luminescence around 855 nm, opening new opportunities for silicon-based NIR photonics.
Authors
- A. Arestakyan
- Narek Margaryan (ORCID: https://orcid.org/0000-0003-1470-7878)
- E. O. Aleksanyan
- Hovhannes Badalyan (ORCID: https://orcid.org/0009-0008-0240-4814)
- Astghik Hovhannisyan
Institutions
- A. Alikhanyan National Laboratory (AM)
- Institute of Fine Organic Chemistry of Scientific - Technological Center of Organic and Pharmaceutical Chemistry (AM)
Publication Details
- Journal
- ACS Omega
- Published
- 2026-01-21
- DOI
- https://doi.org/10.1021/acsomega.5c09247
- Primary Topic
- Silicon Nanostructures and Photoluminescence
- Type
- article
- Field-Weighted Citation Impact
- 0.00