The diffraction formula and statistical law of optical fields are used to get the cross - correlation function of intensities of laser speckles of the moved diffuse object 該方法利用光傳播的菲涅爾衍射公式和光場的統計規律,給出散斑場光強在散射體位移前后的高斯光束相關函數的表達式。
The quantum dots are considered as pyramid shape approximately , therefore the dittraction of dots is considered as diffraction from triangle . the transverse period is obtained using the transform of fourier . the trustiness of this modal is showed through comparing with the result come from triple - axis diffraction formula and result of stm 將量于點近似看成金字塔狀,從而量于點的衍射可以看成三角形衍射,利用三角型的傅立葉變換,求得量于點的橫向周訕,與三9m力射結果及盯m求得量于點的橫向周期一致,說明本模型的可靠性。
In specific , the formulation of the rcwa for 2 - d and 3 - d metallic gratings and the formulation of the fdtd method for dispersive media are presented . a novel hybrid diffraction method , which is based on the kirchhoff - huygens diffraction formula and the rcwa , is proposed to simulate the working of a planar integrated diffraction grating 針對在光通信以及光盤存儲領域的具體應用,著重對二維及三維金屬光柵衍射問題的嚴格耦合波分析以及色散媒質散射問題的時域有限差分方法進行了公式推導。