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説明:

It is known that swift heavy ion (SHI) irradiation induces shape elongation of metal nanoparti-cles (NPs) embedded in transparent insulators, which results in anisotropic optical absorption. Here, we report another type of the optical anisotropy induced in CaF2 crystals without including in-tentionally embedded metal NPs. The samples were irradiated with 200 MeV Xe^14+ ions with an incident angle of 45 deg from the surface normal. With increasing the fluence, an absorption band at ~550 nm, which is ascribed to Ca-aggregates, increases both the intensity and the anisotropy. XTEM observation clarified the formation of the continuous line-structures and the discontinu-ous NP chains parallel to the SHI beam.

権利情報:

• Creative Commons BY Attribution 4.0 International
  

キーワード: swift heavy ion; CaF2; anisotropic optical absorption; nanoparticles; metal aggregate

刊行年月日: 2024-11-07

出版者: MDPI AG

掲載誌:

• Quantum Beam Science (ISSN: 2412382X) vol. 8 issue. 4 29

研究助成金:

• JSPS-KAKENHI 22K04990
• National Natural Science Foundation of China 12235009

原稿種別: 出版者版 (Version of record)

MDR DOI:

公開URL: https://doi.org/10.3390/qubs8040029

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更新時刻: 2024-11-11 16:30:13 +0900

MDRでの公開時刻: 2024-11-11 16:30:14 +0900