Nonlinear optical properties of Rh-Pd and Rh-Pt solid-solution alloy nanoparticles prepared by a laser-induced nucleation method in aqueous solution

Md Samiul Islam Sarker, Takahiro Nakamura, Ali Hossain, Yuichi Kozawa, Shunichi Sato

研究成果: Article査読

抄録

The nonlinear optical properties of Rh-Pd and Rh-Pt solid-solution alloy nanoparticles (NPs) were experimentally investigated by means of the z-scan technique. The open aperture (OA) measurement showed a reverse saturable behavior, whereas the closed aperture (CA) measurement showed a peak- and valley-shape. Both the Rh-Pd and Rh-Pt NPs exhibited a positive nonlinear optical index of refraction at 800 nm relating to the self-focusing phenomenon. In addition, the nonlinear absorption of the Rh-Pt NPs (4.39 × 10−12 cm/W) was higher than that of the Rh-Pd NPs (1.63 × 10−12 cm/W) due to the small interval between the occupied and unoccupied density of states (DOS) of Rh-Pt than Rh-Pd. The nonlinear responses of the Rh-Pd and Rh-Pt NPs was attributed to the hot electron contribution and the reverse saturation of intraband and interband transitions.

本文言語English
ページ(範囲)2891-2900
ページ数10
ジャーナルOSA Continuum
2
10
DOI
出版ステータスPublished - 2019 10 15

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 原子分子物理学および光学
  • 電子工学および電気工学

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