Simulation and imaging using ultrawideband ground penetrating radar and finite-difference time-domain method

Yang, Hong; Yang, Ze; Pei, Yu-Kun; Hao, Jiong-Ju

doi:10.1117/1.jei.26.5.053015

Cited by 1 publication

(1 citation statement)

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“…In this work, the thermal radiation properties of the structure are calculated by solving the system of Maxwell's equations using the FDTD algorithm. The method has been widely used in the calculation of the electromagnetic field of the radiator, which generates Maxwell's spinor equations as a discrete matrix equation of the electromagnetic field, and the differential form of Maxwell's equations can be expressed as (Yang et al, 2017):…”

Section: Numerical Simulation Method-fdtd Theoretical Calculationmentioning

confidence: 99%

Emission mechanism and wide-angle adaptability of selective emitter based on combination of one and two-dimensional photonic crystals

Cao

Cai²,

Zhang³

et al. 2023

Front. Energy Res.

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In this paper, a thermophotovoltaic (TPV) emitter that combines a one-dimensional photonic crystal with two-dimensional periodic nanoarray cavities was proposed. The Finite-Difference Time-Domain (FDTD) method was adopted to analyze the spectral emittance and its sensitivity to the emission angle for the proposed emitter. The results show that the main emission mechanisms of the emitter are Cavity Resonances (CRs), Fabry-Perot (FP) resonances, and Magnetic polaritons (MPs). In the convertible band of a TPV cell, CRs and FP resonances are coupled together to broaden the emitting bandwidth of the emitter. The cut-off wavelength of structural spectral emittance increases with depth and radius but decreases with a period. In addition, the spectral emittance is non-sensitive to the emission angle of less than 50°, highlighting the wide-angle stability of the composite structure. The proposed emitter has wide-angle adaptability and achieves a fine-tunning of bandgap wavelength while maintaining a good spectral selectivity. This work provides new insight into the design of the TPV emitter.

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Section: Numerical Simulation Method-fdtd Theoretical Calculationmentioning

confidence: 99%