電介質系統於時間調和電磁場下之共振與極化電荷及其熱效應，能量傳輸與交互電場增強之探討

Abstract

給定一個系統(我們想描述的客體)，例如一顆在真空中的電介質球，然後我們用某個從遠處發出的單頻電磁波持續照射它，它會持續散射這些電磁波；這是一個光與物質交互作用的例子，古典電動力學的彈性散射模型(如米理論)讓我們可以描述這個系統中各個位置和時間的電磁場到一定的精確度。然而，本論文 將指出，古典彈性散射模型會違反調和場的坡印廷定理以及背後可能的原因，例如物質的電磁性質會隨加熱改變，因此穩態電磁性質的假設不成立，或是能量有可能透過非彈性散射進入其他頻率域，以及因為熱傳需要的溫度梯度違反均質假設。最後，本文會回顧兩個受電磁波照射的雙體系統的中央間隙電漿生成機制的理論，並指出極化電荷造成的電場熱點促使了電漿的生成。

Given a system (what we want to describe), for example, a dielectric sphere in vacuum; if we illuminate this sphere continuously using a monochromatic plane wave, the sphere will keep scattering the plane wave. This is an example of light-matter interaction, and classical elastic scatter model such as Mie theory can describe this system to a certain accuracy. However, this thesis will show that the classical elastic scatter model will violate Poynting’s theorem for harmonic fields and discuss the probable cause, such as the violation of steady-state assumption of electromagnetic property because of heating, or the energy may enter other frequency through inelastic scatter, and the temperature gradient needed for heat transfer violates the homogeneity assumption. Finally, this thesis will discuss two theories regarding the mechanism of plasma formed between the gap of dimer system under electromagnetic irradiation, and favor the theory that the electric field hot-spot due to mutual enhancement of polarization charges causes the plasma formation.