TY - JOUR KW - Deposition KW - Surface KW - Emission KW - Power KW - Deflection KW - Material KW - Thin films KW - Laser KW - Spectroscopy KW - Time KW - Plasma KW - Solids KW - Emission spectroscopy KW - Emission spectroscopy KW - Process KW - Science KW - C KW - Icp-aes KW - Phase KW - M KW - Plasma shielding KW - Solid materials KW - Photothermal KW - Photothermal deflection KW - Heat KW - Laser-energy coupling to solid material KW - Melt KW - Phase change KW - Stress KW - Stresses KW - Switzerland AU - Mark A Shannon AU - Xianglei Mao AU - Richard E Russo AB -

For many laser-material processes, new methods are needed to monitor laser-energy coupling to solid materials. Different methods will be presented which can detect changes in laser-energy coupling due to plasma shielding, phase change, and surface alterations. The techniques used are inductively coupled plasma-atomic emission spectroscopy (ICP-AES), mechanical stress power (MSP), and photothermal deflection (PTD). This work demonstrates that the onset of plasma shielding can be detected for ns and ps laser interactions with solids, using ICP-AES and MSP, and that the onset of melt at a surface can be detected using PTD. (C) 1997 Elsevier Science S.A

AN - 78 BT - Materials Science and Engineering B-Solid State Materials for Advanced Technology LA - eng LB - Laser N1 -

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For many laser-material processes, new methods are needed to monitor laser-energy coupling to solid materials. Different methods will be presented which can detect changes in laser-energy coupling due to plasma shielding, phase change, and surface alterations. The techniques used are inductively coupled plasma-atomic emission spectroscopy (ICP-AES), mechanical stress power (MSP), and photothermal deflection (PTD). This work demonstrates that the onset of plasma shielding can be detected for ns and ps laser interactions with solids, using ICP-AES and MSP, and that the onset of melt at a surface can be detected using PTD. (C) 1997 Elsevier Science S.A

PY - 1997 SP - 172 EP - 179 T2 - Materials Science and Engineering B-Solid State Materials for Advanced Technology TI - Monitoring laser-energy coupling to solid materials: Plasma-shielding and phase change VL - 45 ER -