期刊
OPTICS EXPRESS
卷 25, 期 9, 页码 10449-10455出版社
OPTICAL SOC AMER
DOI: 10.1364/OE.25.010449
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资金
- JSPS KAKENHI [JP15K13501, JP16H06505, JP16H03884]
- The Murata Science Foundation
- Izumi Science and Technology Foundation
- Grants-in-Aid for Scientific Research [16H06505, 16K13821, 17K17841, 16H03884] Funding Source: KAKEN
ZnO microspheres fabricated via laser ablation in superfluid helium were found to have bubble-like voids. Even a microsphere demonstrating clear whispering gallery mode resonances in the luminescence had voids. Our analysis confirmed that some voids are located away from the surface and have negligible or little effect on the whispering gallery mode resonances since the electromagnetic energy localizes near the surface of these microspheres. The existence of the voids indicates that helium gas or any evaporated target material was present within the molten microparticles during the microsphere formation. (C) 2017 Optical Society of America
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