Tuning of localized plasmon resonance in colloidal gold nano-particles by ultrafast interband photoinjection of free carriers: Superplasmonic states?
| Autor: | S. N. Shelygina, Vadim P. Veiko, A. A. Samokhvalov, Sergey I. Kudryashov |
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| Rok vydání: | 2019 |
| Předmět: |
010302 applied physics
Materials science Physics and Astronomy (miscellaneous) business.industry Nanoparticle 02 engineering and technology 021001 nanoscience & nanotechnology Laser 01 natural sciences Spectral line Supercontinuum law.invention law Colloidal gold 0103 physical sciences Optoelectronics Laser power scaling Surface plasmon resonance 0210 nano-technology business Ultrashort pulse |
| Zdroj: | Applied Physics Letters. 115:161903 |
| ISSN: | 1077-3118 0003-6951 |
| DOI: | 10.1063/1.5124950 |
| Popis: | Colloidal solutions of gold nanoparticles in water were pumped by filamentary 800-nm, 100-fs laser pulses at variable supercritical peak powers and probed by the accompanying ultrashort white-light supercontinuum pulses. Their broadband (UV-near-IR) spectra revealed the localized plasmon resonance blue-shifting, broadening, and intensity reduction vs the incident peak laser power as a result of the increasing concentration of s-band free carriers additionally photoinjected from high-density d-bands. |
| Databáze: | OpenAIRE |
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