Abstract.
In order to increasing the damage threshold of metal mirrors we propose to create a special structure on the surface of the mirrors ("photonic surface"). This structure must have the period about $\lambda /2$ and will suppress propagation of surface plasmons with the frequency $\omega_0 = 2\pi c/\lambda$ along the surface. This structure also will slightly increase the heat removal from the mirror's surface by the excitation of the thermostimulated plasmon emission from the surface. The heat removal from the surface is estimated and possible implementation of this approach for the radiation of $\rm CO_2$--lasers ($\lambda=10.6~\mu$m) and Nd-YAG--lasers ($\lambda=1.06~\mu$m) is analyzed.

Fig.1 SP dispersion curve for the flat surface (dashed line) and for the corrugated surface with the pitch $\Lambda=\lambda_{\mathrm SP}/2$ (solid line).

Fig.2 Radiative heat removal from the flat mirror $\Delta P(T)= P_{\mathrm M}^{\mathrm flat}(T)- P_{\mathrm M}^{\mathrm flat}(300~{\mathrm K}) $.

Fig.3 Increase of the radiative heat removal from the grating with $h=\lambda/10$ respective to the radiative heat removal from the flat mirror ($h=0$).

Fig.4 The dependence of the heat removal respective to corrugation amplitude of the gold grating at $700$~K.

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Массаракш, страшная штука - Черное Излучение,
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