Evidence of strong contribution from neutral atoms in intense harmonic generation from nanoparticles

Autor:	Tsuneyuki Ozaki, L. B. Elouga Bom, J. Abdul-Hadi, Rashid A. Ganeev
Rok vydání:	2010
Předmět:	Harmonic spectrum Materials science Energetic neutral atom Harmonics Harmonic Nanoparticle High harmonic generation Surface second harmonic generation Plasma Electrical and Electronic Engineering Atomic physics Condensed Matter Physics Atomic and Molecular Physics and Optics
Zdroj:	Laser and Particle Beams. 28:69-74
ISSN:	1469-803X 0263-0346
DOI:	10.1017/s0263034609990589
Popis:	We show experimental evidence that, for the intense high-order harmonics from nanoparticles, there is a strong contribution from neutral atoms. We present the results of studies on the harmonics generated in laser-produced plasmas containing various nanoparticles, including Cr2O3, In2O3, Ag, MnTiO3, Sn, Cu, and Au. These results are compared with the harmonics generated from plasma produced on the surface of bulk targets. The harmonic spectrum from nanoparticle and bulk In2O3 show that there is a lack in the resonant enhancement of the 13th harmonic for the former. Along with the relatively low cut-off for nanoparticle harmonics, these results show that it is the neutral atom in the nanoparticle that emits the intense harmonics. Structural studies of plasma debris confirm the presence and integrity of nanoparticles in the plasma plumes.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::84005ebc212dabc303c9b733935b40af https://doi.org/10.1017/s0263034609990589 Zobrazit plný text záznamu