ナノ電磁界解析シミュレーション

ナノスケールの電磁界解析にはFDTD法が広く利用されているが，計算精度や計算時間などの観点から解析が困難となることがあるため，数値逆ラプラス変換法を用いた時間応答解析を開発している．

Nano Electromagnetic Simulation

Conventionally, time domain analysis of near-field lights generated by nanoparticles has been performed by using the finite-difference time-domain (FDTD) method. We have applied the numerical inversion of the Laplace transform to analyze the time domain responses of specific plasmon modes in nanoparticles. In our method, plasmon modes are obtained in the complex frequency domain and they are numerically transformed into the time domain. The proposed method is error controllable and reliable simulation can be performed. Figure 1 shows the time domain response of a plasmon mode when the laser pulse is incident on a metallic sphere for the case of the Drudemodel. The computational result obtained by our method is in complete agreement with the exact solution. A surface plasmon mode is shown in Figure 2.