Nanoporous gold nanoleaf as tunable metamaterial
Abstract
We have studied optical properties of single-layer and multi-fold nanoporous gold leaf (NPGL) metamaterials and observed highly unusual transmission spectra composed of two well-resolved peaks. We explain this phenomenon in terms of a surface plasmon absorption band positioned on the top of a broader transmission band, the latter being characteristic of both homogeneous “solid” and inhomogeneous “diluted” Au films. The transmission spectra of NPGL metamaterials were shown to be controlled by external dielectric environments, e.g. water and applied voltage in an electrochemical cell. This paves the road to numerous functionalities of the studied tunable and active metamaterials, including control of spontaneous emission, energy transfer and many others.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Jan 19, 2021
- Source ID
- 10.1038/s41598-021-81128-4
Entities
People
- Devon Courtwright
- Ezekiel Mills
- Jakeem C. Adrien
- M. A. Noginov
- Mohammad Shahabuddin
- Monika M. Biener
- Natalia Noginova
- Sangeeta Rout
- Zhen Qi
Organizations
- Air Force Office of Scientific Research
- United States Department of Defense
- United States Department of Energy