a plasma absorption wave limiter is disclosed . the plasma absorption wave limiter comprises a limiting layer and a trigger layer . the limiting layer is transmissive in a pass band of a sensor and capable of generating a reflective and absorptive free electron plasma that will propagate and dissipate therein . the trigger layer is located aft of and in contact with the limiting layer and is capable of residually absorbing incident radiation and initiating the thermal plasma wave in the limiting layer responsive to a threat .