Inverse bremsstrahlung
, and . "Observation of plasma shielding by measuring transmitted and reflected laser pulse temporal profiles." Applied Physics A-Materials Science & Processing 64.1 (1997) 1–6.
, , , and . "Plasma Shielding During Picosecond Laser Sampling of Solid Materials by Ablation in He Versus Ar Atmosphere." Journal of Applied Physics 74.8 (1993) 4915–4922.