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Enhancement of Sensitivity with High−Reflective−Index Guided−Wave Nanomaterials for a Long−Range Surface Plasmon Resonance Sensor
| Content Provider | MDPI |
|---|---|
| Author | Wu, Leiming Che, Kai Xiang, Yuanjiang Qin, Yuwen |
| Copyright Year | 2022 |
| Description | 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., $CH_{3}NH_{3}PbBr_{3}$ 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#x2212;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 $CH_{3}NH_{3}PbBr_{3}$ GW layer, and the corresponding figure of merit (FOM) was 8.16 × $10^{4}$ $RIU^{−1}$ $deg^{−1}$. Compared with the conventional LRSPR sensor (S = 688.9 $RIU^{−1}$), the sensitivity of this new type of sensor was improved by nearly 94%. |
| Starting Page | 168 |
| e-ISSN | 20794991 |
| DOI | 10.3390/nano12010168 |
| Journal | Nanomaterials |
| Issue Number | 1 |
| Volume Number | 12 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2022-01-04 |
| Access Restriction | Open |
| Subject Keyword | Nanomaterials Telecommunications Long−range Surface Plasmon Resonance High−refractive−index Guided−wave Layer Sensitivity |
| Content Type | Text |
| Resource Type | Article |
