Temperature distributions produced in a two-layer structure by a scanning cw laser or electron beam

Abstract

Articles you may be interested inTemperature distributions produced in an Nlayer film structure by static or scanning laser or electron beam with application to magnetooptical media Theory of transient temperature response of a twolayer system heated with a localized laser beam J. Appl. Phys. 60, 3417 (1986); 10.1063/1.337640Nonlinear calculation of a temperature profile produced in a twolayer structure by a scanning cw elliptical laser or electron beam J. Appl. Phys. 57, 965 (1985); 10.1063/1.334698Temperature profiles induced by a scanning cw laser beam Temperature distributions produced in semiconductors by a scanning elliptical or circular cw laser beamWe derive the Green's function solution to the heat equation for a two-layer structure and describe how to extend the technique to derive the Green's function for N-Iayer structures. The Green's function is applied to the interaction of a two-layer structure with scanning circular energy beams. The mathematics necessary to reduce the resultant solutions from a quintuple integral to a double integral are presented. Numerical integration of the remaining integrals leads to temperature profiles generated during laser irradiation of two-layer structures. These profiles are shown to reduce, in the appropriate limits, to previously reported profiles for the single-material case. Normalized linear temperature profiles as well as actual temperature profiles for silicon on sapphire are presented and discussed.PACS numbers: 79.20.0s 4357

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Design of a Closed Loop Computer Controlled System for Selective Area Laser Deposition. I. Laser Systems, Gasflow, and Substrate Temperature Control

“…The physics of the process are extremely complicated. For example, SALD involves the formation of three dimensional hemispherical boundary layers around the moving deposition regime (6,7) and the substrate heating is a transient, moving boundary value problem (8)(9)(10)(11)(12). Intense photon flux and thermal energy at the substrate surface is known to create plasmas under certain conditions via either a multiphoton induced ionization mechanism or by direct interaction of electrons with the strong electromagnetic fields that exist in focused laser beams via inverse bremsstrahlung, leading to a cascade mechanism (13).…”

Thermal scaling laws of the optical Bragg acceleration structure

“…Heat conduction in multilayered structures has also been investigated. For example, the thermal profile of a multilayered structure heated by a scanning laser or by an electron beam [31][32][33][34] has been determined, both being common processes in fields such as magneto-optical media, electron beam lithography, and ion implantation. A similar problem was solved in order to describe the photothermal deflection of a laser beam passing above heated multilayered media [35].…”