FDTD method for laser absorption in metals for large scale problems
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- FDTD method for laser absorption in metals for large scale problems
- Deng, Chun; Ki, Hyungson
- Issue Date
- OPTICAL SOC AMER
- OPTICS EXPRESS, v.21, no.21, pp.25467 - 25479
- The FDTD method has been successfully used for many electromagnetic problems, but its application to laser material processing has been limited because even a several-millimeter domain requires a prohibitively large number of grids. In this article, we present a novel FDTD method for simulating large-scale laser beam absorption problems, especially for metals, by enlarging laser wavelength while maintaining the material’s reflection characteristics. For validation purposes, the proposed method has been tested with in-house FDTD codes to simulate p-, s-, and circularly polarized 1.06 μm irradiation on Fe and Sn targets, and the simulation results are in good agreement with theoretical predictions.
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