Abstract
A novel soil nutrient sensor (SNS) for smart agriculture is designed using the hexagonal resonator 2D-photonic crystal (PhC) in this article. The PhCs are spatially ordered structures any substrate with repetitive modulation of the refractive index (RI) of any material. It has the efficient light guidance, and it would be beneficial to gain localization in the handling different applications. The permittivity of soil particles is grander to the air, and the propagation characteristics of the electromagnetic waves are modified. In the PhC structure, the dimension of the proposed SNS is 11.4 × 9.2 µm2. The simulation results were analyzed by using the FDTD method using the RSoft tool. The Quality Factor (QF) of 228.6 with 100% output efficiency (η) at resonant wavelength (λr) 1600 nm are achieved. The soil imbalance is identified at the appropriate time by the proposed SNS so that primary retrieval of the crop production is achievable. To the best of the authors knowledge, the PhC-based soil sensor is designed for the first time.
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