A countermeasure device includes an emitter having a surface. A band gap
material is integral with the surface of the emitter. A series of
apertures are formed in the band gap material. A heat source for heating
the emitter is provided proximate to the emitter and may be the metal
surface itself. When the emitter is heated, the band gap material, and
the apertures therein, allows the emitter to emit photons at
predetermined wavelengths.