[Carry_Okie]

Is there a serviceable material that does not have an adsorption band for the incident MIRACL frequency?

I know there has to be one because otherwise one couldn't make a laser. I just don't know if it, or an equivalent, is adaptable to coating a rocket body.

[USAF_TSgt]

Ahhh, the problem is keeping it (whatever material that reflects the mid-infrared) from melting from the friction as it moves through the thick lower atmosphere. Also, once you get into mid-infrared (starting at around 2.5 microns up to about 8 microns), the nature of materials changes from reflective to emissive. Most objects, especially moderately warm ones, no longer reflect energy, but emit it as well. The mid-infrared laser adds to this energy, basically adding gasoline to a fire.