發(fā)布時間：2018-03-29 20:36

  本文選題：量子雙態(tài)系統(tǒng)　切入點：模式　出處：《哈爾濱工業(yè)大學》2015年碩士論文

【摘要】：本文以具有優(yōu)美特性的量子雙態(tài)系統(tǒng)為出發(fā)點,根據量子力學中的“定態(tài)”概念,定義了電磁分析中“模式”的概念。通過構造并詳細類比分析與之遵守相似方程的耦合雙諧振子系統(tǒng),提出一套基于模式及其轉化的電磁分析方法和認識問題的角度。然后,將這種研究推廣到N個,直至無窮個,耦合諧振子的系統(tǒng),分析了電磁波在其中的傳播情況,以及他們的帶寬,諧振點分布和色散特性。進而,通過在集總電路中引入物理距離的方法,將離散的無窮周期結構推廣到連續(xù),發(fā)現其與麥克斯韋方程形式上是一致的,這也揭露了這種基于模式及其轉化的電磁分析方法的深刻本質和應用的普適性(對于連續(xù)系統(tǒng)只需求取極限)。接著,根據以上理論基礎,類比氨分子微波激射器原理,設計了一種新型變頻器,他不是傳統(tǒng)的非線性系統(tǒng),而是一種線性時變系統(tǒng),這種變頻器不僅可以驗證模式理論分析是否正確,也由于其輸入輸出兩個頻率的電流具有的天然的正交性,因此不需要使用濾波器進行隔離,從而可以實現較近頻率的頻率變換。最后,結合當前的研究熱點,設計了一種由石墨烯薄層覆蓋的光柵,這種光柵可以被入射電磁波激勵出表面等離子激元(SPP),而通過將兩個石墨烯光柵耦合在一起,設計出了一種雙頻吸波體,同時吸波體的耦合諧振子的諧振特性也驗證了之前的理論分析。
[Abstract]:In this paper, based on the concept of "steady state" in quantum mechanics, based on the concept of "steady state" in quantum mechanics, The concept of "mode" in electromagnetic analysis is defined. A set of electromagnetic analysis methods based on mode and its transformation and the angle of understanding the problem are presented by constructing and comparing the coupled double harmonic oscillator system with the similar equation in detail. This study is extended to N, up to infinity, coupled harmonic oscillator systems. The propagation of electromagnetic waves in them, their bandwidth, resonance point distribution and dispersion characteristics are analyzed. By introducing physical distance into lumped circuits, the discrete infinite periodic structure is extended to continuity. It is found that the structure is in agreement with Maxwell's equation in form. This also reveals the profound nature of this method of electromagnetic analysis based on mode and its transformation, and the universality of its application (taking the limit only for continuous systems). Then, according to the above theoretical basis, the analogous principle of ammonia molecular microwave ejector is presented. A new type of inverter is designed. It is not a traditional nonlinear system, but a linear time-varying system. This kind of inverter can not only verify whether the mode theory analysis is correct, Because of the natural orthogonality of the current in and out of the two frequencies, it is not necessary to use a filter to isolate it, so that the frequency conversion of the near frequency can be realized. Finally, combined with the current research focus, A kind of grating covered with graphene thin layer is designed. The grating can be excited by the incident electromagnetic wave to produce the surface plasma exciter SPP, and by coupling two graphene gratings together, a kind of double frequency absorbing body is designed. At the same time, the resonance characteristics of the coupled harmonic oscillator of the absorber also verify the previous theoretical analysis.
【學位授予單位】：哈爾濱工業(yè)大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：O441;TN773

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