Extending semiconductor plasmonics to the UV: Fano resonances and disorder engineering in Ag–In–S nanoparticles
6 affiliations
- 1Institute of Chemistry, Faculty of Natural Sciences and Mathematics, SS. Cyril and Methodius University, POB 162 1000 Skopje North Macedonia
- 2School of Physics Engineering and Technology, University of York York YO10 5DD UK
- 3Department of Physical Sciences, Faculty of Science, University of Jeddah P.O. Box 13151 Jeddah 21493 Saudi Arabia
- 4The York-JEOL Nanocentre, University of York York YO10 5DD UK
- 5Area Science Park Padriciano 99 34149 Trieste Italy
- 6Department of Chemistry, University of York York YO10 5DD UK
Abstract
We report widely tunable plasmonic resonance in ternary Ag–In–S and quaternary Ag–In–S–Zn semiconductor nanoparticles (NPs), that exhibit intraband free-carrier localized surface plasmon resonance (LSPR) in the NIR and interband-driven plasmon/plexcitonic Fano mode in the UV spectral regions (300–350 nm), extending semiconductor plasmonics to short wavelengths. These plasmonic properties are precisely tailored by controlling electronic structure, including energy band gaps and Urbach energies in addition to free charge carrier concentration via extrinsic Zn-doping and sonochemically controlled structural disorder. While NIR LSPR bands are symmetric, the UV plasmonic peaks are notably asymmetric and can be modelled with a Fano-like band shape function. The nature of the asymmetry is quantum-mechanical i.e. a Fano-like resonance between a continuous plasmon state and a discrete electronic excitation. By interpolating the experimental interband plasmonic bands in the UV region with a generalized Fano line shape function, relevant parameters such as plasmon damping, resonance energy and asymmetry factor were obtained. In addition, we show that a classical electrodynamics approach based on a driven-damped oscillator also reproduces the asymmetry. The demonstrated plasmon-exciton coupling in Ag–In–S based NPs, which is tunable via both external doping and sonochemical processing, offers a new platform for potential applications requiring precise control of plasmon absorption across a wide spectral region.
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BibTeX
@article{pejova2026extending,
title = {{Extending semiconductor plasmonics to the UV: Fano resonances and disorder engineering in Ag–In–S nanoparticles}},
author = {Biljana Pejova and Julio A. do Nascimento and Rola Moussa and Fayzah Talbi and Adam Kerrigan and Leonardo Lari and Richard Douthwaite and Ljupcho Pejov and Vlado K. Lazarov},
journal = {Journal of materials chemistry. C},
year = {2026},
month = oct,
doi = {10.1039/d6tc02675c},
url = {https://europepmc.org/article/PMC/PMC13728871},
note = {CC BY},
}
RIS
TY - JOUR
TI - Extending semiconductor plasmonics to the UV: Fano resonances and disorder engineering in Ag–In–S nanoparticles
AU - Biljana Pejova
AU - Julio A. do Nascimento
AU - Rola Moussa
AU - Fayzah Talbi
AU - Adam Kerrigan
AU - Leonardo Lari
AU - Richard Douthwaite
AU - Ljupcho Pejov
AU - Vlado K. Lazarov
PY - 2026
DA - 2026/10/26
JO - Journal of materials chemistry. C
DO - 10.1039/d6tc02675c
UR - https://europepmc.org/article/PMC/PMC13728871
AB - We report widely tunable plasmonic resonance in ternary Ag–In–S and quaternary Ag–In–S–Zn semiconductor nanoparticles (NPs), that exhibit intraband free-carrier localized surface plasmon resonance (LSPR) in the NIR and interband-driven plasmon/plexcitonic Fano mode in the UV spectral regions (300–350 nm), extending semiconductor plasmonics to short wavelengths. These plasmonic properties are precisely tailored by controlling electronic structure, including energy band gaps and Urbach energies in addition to free charge carrier concentration via extrinsic Zn-doping and sonochemically controlled structural disorder. While NIR LSPR bands are symmetric, the UV plasmonic peaks are notably asymmetric and can be modelled with a Fano-like band shape function. The nature of the asymmetry is quantum-mechanical i.e. a Fano-like resonance between a continuous plasmon state and a discrete electronic excitation. By interpolating the experimental interband plasmonic bands in the UV region with a generalized Fano line shape function, relevant parameters such as plasmon damping, resonance energy and asymmetry factor were obtained. In addition, we show that a classical electrodynamics approach based on a driven-damped oscillator also reproduces the asymmetry. The demonstrated plasmon-exciton coupling in Ag–In–S based NPs, which is tunable via both external doping and sonochemical processing, offers a new platform for potential applications requiring precise control of plasmon absorption across a wide spectral region.
SN - 2050-7526
SN - 2050-7534
ER -