Study the plasmonic property of gold nanorods highly above damage threshold via single-pulse spectral hole-burning experiments
Abstract
Intense femtosecond laser irradiation reshapes gold nanorods, resulting in a persistent hole in the optical absorption spectrum of the nanorods at the wavelength of the laser. Single-pulse hole-burning experiments were performed in a mixture of nanorods with a broad absorption around 800 nm with a 35-fs laser with 800 nm wavelength and 6 mJ/pulse. A significant increase in hole burning width at an average fluence of 106 J/m2 has been found, suggesting a tripled damping coefficient of plasmon. This shows that the surface plasmonic effect still occurs at extremely high femtosecond laser fluences just before the nanorods are damaged and the remaining 10% plasmonic enhancement of light is at the fluence of 106 J/m2, which is several orders of magnitude higher than the damage threshold of the gold nanorods. Plasmon–photon interactions may also cause an increase in the damping coefficient.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Nov 15, 2021
- Source ID
- 10.1038/s41598-021-01195-5
Entities
People
- Mengyan Shen
- Zhe Kan
- Zibo Wang
Organizations
- Army Research Office