Journal
IEEE SENSORS JOURNAL
Volume 21, Issue 5, Pages 6043-6049Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JSEN.2020.3042470
Keywords
ITO; imaging sensitivity; LMR sensor; two-dimensional transition metal dichalcogenides
Funding
- National Natural Science Foundation of China (NSFC) [61771419]
- Hebei Province Natural Science Foundation [F2017203220]
- Hebei Province Innovation Foundation for Postgraduate [CXZZSS2020051]
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The study introduces a LMR sensor based on TMDs-ITO structure with high imaging sensitivity and support for both TE and TM polarizations, which demonstrates significant advantages compared to traditional SPR sensors.
Two-dimensional transition metal dichalcogenides (TMDs) have very potential properties for sensing applications. Hence, a lossy-moderesonance(LMR) refractive index (RI) sensor based on TMDs-indium-tin-oxide (ITO) configuration is proposed for high imaging sensitivity. A significant advantage of the proposed LMR sensor is that can achieve sharp resonance curves for both the transverse electric (TE) and transversemagnetic (TM) polarizationswhile the traditional surface plasmon resonance (SPR) sensor can only support TM polarizations. Through theoretical analysis, we found that the imaging sensitivity can be improved to 6438 RIU-1 (n(s) = 1.330) and 6695 RIU-1 (n(s) = 1.340) for TE and TM polarizations, respectively. It is an existing improvement of about 85.84 times and 11.5 times correspond to the single ITO-based LMR sensor without TMDs, respectively. This article reveals the design rules of the LMR sensor after system research, which provides guidance for further research and applied in environmental monitoring, biomolecules inspection, and so on.
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