近場光碟熱效應的模擬與研究

Abstract

本論文主要是在研究雷射光照射近場光碟光與熱交互作用的理論分析。首先，我們利用有限差分數值方法模擬光碟片裡由雷射光所引起的熱傳導現象，並且利用電磁波理論來計算單位面積在多層膜z方向流進的平均能量做為膜層吸收光能的條件。對於可重複寫入的光碟片研究，我們加入了成核成長的理論分析來模擬相變材料光碟片記錄點的寫入與擦拭。 最後，我們結合了傅立葉光學理論以及熱傳導模型來分析光照射在近場光碟片的光熱的交互作用，並且藉由改變雷射光的脈衝時間寫下不同大小的記錄點，來分析由於隨機分佈奈米結構的影響，對於可分辨出較小記錄點訊號的能力。對於我們模擬的結果，都有加入收斂性測試的理論分析，來驗證結果的正確性。

The main purpose of this thesis is to study of optics-thermal interaction of near-field optical disks. First, we use the finite difference method to simulate the laser-induced local heating of optical disks, and use the electromagnetic wave theory to calculate the average rate of flow of optical energy through a plane perpendicular to the Z axis. To study of rewriteable disks, we use nucleation and growth theory to simulate mark formation and erasure in phase change recording disk. Finally, we combine the theory of Fourier optics and thermal conduction models to analysis optics-thermal interaction of near-field disks, by changing the laser pulse to write different mark sizes, we can analysis the influence of random nanostructures for the resolution capability of mark size beyond diffraction limit. For our simulation results, the convergence test is used to verify the results of our simulation.