激光阈值
材料科学
低语长廊波浪
辐射
Q系数
镧系元素
激光器
兴奋剂
光电子学
球体
纳米颗粒
光学
不透明度
纳米技术
化学
谐振器
物理
离子
波长
有机化学
天文
作者
Xiaojing Xia,Anupum Pant,R. Greg Felsted,Rachel E. Gariepy,E. James Davis,Peter J. Pauzauskie
摘要
Microlasers based on lanthanide-doped upconverting nanoparticles (UCNPs) have been demonstrated but radia- tion balanced lasing (RBL) remains a challenge. We present a novel design of radiation-balanced microlaser using microspheres coated with UCNPs. The model is tested using nitrogen vacancy doped nanodiamonds (NV:NDs) coated on silica microspheres. High quality factor enhancement of selective bands in the NV spectral features due to coupled whispering gallery modes (WGMs) was measured. The temperature of NDs on silica spheres was measured experimentally using Debye-Waller factor thermometry and analyzed using a novel analytical heat transfer model for spherical coordinates with localized sources.
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