Phys 633

Laser - Matter Interaction 
Laser beam characteristics- Beam focusing effects - Semi classical theory of absorption and emission – Reflectivity & transmission of matter – Photon transport theory - Laser beam heating, melting, vaporization – Plasma formation- Rate of heating and cooling – Operational regimes in material processing -Depth of penetration – Key hole effect – Surface treatment (modification, cladding, alloying and hardening) – High power laser int. with solids (welding , cutting) – Optical properties of tissue - Laser tissue interaction (thermal, photochemical, photo mechanical, photo ablation, plasma induced ablation and photo description).