Journal
NANOMATERIALS
Volume 12, Issue 1, Pages -Publisher
MDPI
DOI: 10.3390/nano12010168
Keywords
long range surface plasmon resonance; high refractive index guided wave layer; sensitivity
Categories
Funding
- National Key R&D Program of China [2018YFB1801001]
- Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai)
- National Natural Science Foundation of China [62105069]
- Postdoctoral Research Foundation of China [402210053]
- Guangdong Introducing Innovative and Entrepreneurial Teams of The Pearl River Talent Recruitment Program [2019ZT08 x 340]
- Research and Development Plan in Key Areas of Guangdong Province [2018B010114002]
- Guangdong Provincial Key Laboratory of Information Photonics Technology [2020B121201011]
- Science and Technology Planning Project of Shenzhen Municipality [JCYJ20190808143801672, JCYJ20190808150803580, JCYJ20180508152903208]
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This study proposes a guided wave long range surface plasmon resonance sensor that achieves high sensitivity through optimization of dielectric materials in the sensing structure.
A guided wave long range surface plasmon resonance (GW LRSPR) sensor was proposed in this investigation. In the proposed sensor, high refractive index (RI) dielectric films (i.e., CH3NH3PbBr3 perovskite, silicon) served as the guided wave (GW) layer, which was combined with the long range surface plasmon resonance (LRSPR) structure to form the GW LRSPR sensing structure. The theoretical results based on the transfer matrix method (TMM) demonstrated that the LRSPR signal was enhanced by the additional high RI GW layer, which was called the GW LRSPR signal. The achieved GW LRSPR signal had a strong ability to perceive the analyte. By optimizing the low and high RI dielectrics in the GW LRSPR sensing structure, we obtained the highest sensitivity (S) of 1340.4 RIU-1 based on a CH3NH3PbBr3 GW layer, and the corresponding figure of merit (FOM) was 8.16 X 104 RIU-1 deg(-1). Compared with the conventional LRSPR sensor (S = 688.9 RIU-1), the sensitivity of this new type of sensor was improved by nearly 94%.
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