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Ultrasensitive Optical Refractive Index Detection of NaCl and Alcohol Solutions Based on Weak Value Amplification
Xu, Liping1,2; Luo, Lan3; Wu, Hao2,4; Luo, Zhengchun1; Chang, Tianying1; Wu, Peng2; Du, Chunlei2; Cui, Hong-Liang1,2
2019-12-04
摘要An ultrasensitive surface plasmon resonance (SPR) refractive index detection scheme based on weak value amplification is presented. Extremely low refractive index change (9.8 x 10(-7) RIU) of sodium chloride solution was readily measurable, with a resolution of 1.3 x 10(-7) RIU, a nearly three orders of magnitude increase in sensitivity over conventional SPR index-sensors via intensity interrogation. Preliminary measurement of refractive index change of alcohol solution demonstrated a minimum of 4.0 x 10(-6) RIU with a resolution of 3.7 x 10(-7) RIU, better than those obtained through wavelength-modulated heterodyne interferometry (with a resolution of 1.5 x 10(-6) RIU). The system is highly stable, having a simple and compact configuration, lending to easy and repeatable operation in standard ambient environment.
关键词Ultrasensitive index change detection Weak value amplification Surface Plasmon resonance
DOI10.1007/s11468-019-01037-1
发表期刊PLASMONICS
ISSN1557-1955
页码8
通讯作者Chang, Tianying(tchang@jlu.edu.cn) ; Wu, Peng(pengwu@cigit.ac.cn)
收录类别SCI
WOS记录号WOS:000501352600001
语种英语