This work investigates the design of two-dimensional selective thermal emitters (STEs) made of tungsten or molybdenum disks with a hafnia spacer for thermophotovoltaic applications. A parametric analysis was performed to study the effect of geometry on the thermal emittance and to identify designs optimized for use with a GaSb photovoltaic cell. The spectral and angular emittance of the STEs, as well as the electromagnetic field distributions to identify resonant modes, were computed using the finite element method (FEM) in JCMsuite.
G. Silva-Oelker, et al. Numerical study of high-temperature, disk-based tungsten and molybdenum thermophotovoltaic selective thermal emitters. Opt. Express, 33, 6953 (2025).
DOI: 10.1364/OE.545130