In this letter, a new optimization structure is proposed for enhancing the sensitivity of the surface plasmon resonance (SPR) based gas sensor with the help of alternative striations structure of the gold metal (Au) and black phosphorus (BP) [two-dimensional (2-D) material]. The sensitivity of the proposed optimized structure was enhanced by ~80.5% from the conventional sensor, and it again improved up to ~102.39% with the addition of extra BP layers between the gold layers. The results obtained show that the proposed sensor can play a vital role in the application of BP 2-D material in SPR-based sensors for gas sensing.
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Singh et al. (2019) studied this question.
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