Fig. 2

Anisotropy in thermal photonics. a SiC nanoantenna and polarization-dependent emissivity spectra. b SiC gratings for directional and coherent thermal emission. Red and green lines show the experimental and calculated results, respectively. c SWCNT-based HMM thermal emitters and the polarization-dependent frequency-integrated emission. d Multi-sized gap-plasmon broadband absorber and wavelength-insensitive reflection spectra. The reflection spectra with different polarization states are shown. e SiC bowtie nanoantenna for highly efficient narrow-band selective thermal emitter. f HMM-based broadband infrared absorber with the out-of-plane anisotropy. Figures adapted from: a, ref [15]; b, ref [19]; c, ref [27]; d, ref [30]; e, ref [34]; f, ref [35]