用于亚微米跟踪乳胶探测器的超分辨等离子体成像显微术
Super resolution plasmonic imaging microscopy for submicron tracking emulsion detector
摘要：
NIT是一种超细颗粒的核乳胶，具有纳米级的电离粒子探测能力，并通过一条形状和大小各异的银纳米颗粒线记录粒子轨迹。粒子径迹的读出需要一些显微技术，本文主要研究了银纳米粒子的光学响应，实现了超越衍射极限的读出方法。本文提出了一种利用局域表面等离子体共振（LSPR）偏振相关光学响应的超分辨等离子体成像显微镜（SPRIM）。SPRIM用于识别纳米颗粒位置的空间分辨率达到5 nm。实验结果表明，SPRIM能很好地分辨出平均射程为270 nm的100 keV碳离子径迹和直径为60 nm的单个纳米颗粒，对100 keV碳离子径迹的识别率为49%，角分辨率为17 °。
英文摘要：
NIT is a super fine-grained nuclear emulsion which has a detection capability for ionizing particle with nanometric resolution and record the track by a line of silver nanograin with a various of shape and size. The particle tracks need to be read out by some microscopic techniques, here we focused on the optical response of silver nanograins to realize the readout method beyond the diffraction limit. In this paper, super-resolution plasmonic imaging microscopy (SPRIM), which utilized the polarization-dependent optical response due to Localized Surface Plasmon Resonance (LSPR) was developed. The spatial resolution of SPRIM to identify the nanograin position was achieved 5 nm. We showed that the SPRIM clearly discriminated the 100 keV carbon ions tracks with the mean range of 270 nm from single nanograins with the diameter of 60 nm.The recognition efficiency of 100 keV carbon track was 49 % and the angular resolution was 17 degree.
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