本文選題：磁性特異電磁介質(zhì) + 多重散射理論��； 參考：《浙江師范大學(xué)》2015年碩士論文

【摘要】：特異電磁介質(zhì)是一種人造的亞波長單元陣列成的材料。傳統(tǒng)材料的電磁特性源自原子和分子,而特異電磁介質(zhì)給予我們設(shè)計亞波長尺度的“原子”。因此特異電磁介質(zhì)能夠?qū)崿F(xiàn)自然界很難實(shí)現(xiàn)的性質(zhì),如：電磁波隱身、負(fù)折射材料、零折射材料、突破衍射極限的超分辨率和其他非互易現(xiàn)象等等。特異電磁介質(zhì)不僅局限于特殊電磁特性,為了增加其在設(shè)計和應(yīng)用中的靈活性與自由性,可調(diào)控特異電磁介質(zhì)也被提出。正因?yàn)槠娈愲姶判再|(zhì)和可調(diào)控特性,特異電磁介質(zhì)在微波、太赫茲波、紅外線和可見光波都有廣泛的研究。本文在微波頻段研究了溫度調(diào)控磁性特異電磁介質(zhì)、零折射特性以及零折射附近存在的古斯-漢欣位移等三個特性。本文包括四章,第一章是緒論,介紹了研究背景和理論。其余三章內(nèi)容如下：第二章,磁性特異電磁介質(zhì)已經(jīng)在理論和實(shí)驗(yàn)上實(shí)現(xiàn)了使用外加磁場調(diào)控�？紤]到溫度對鐵氧體的影響,我們在理論上設(shè)計了使用溫度對磁性特異電磁介質(zhì)調(diào)控。使用溫度調(diào)控代替外加磁場,這增加了調(diào)控的自由度；第三章,等效介電常數(shù)和磁導(dǎo)率同時等于零的匹配型零折射特異電磁介質(zhì)具有無相位延遲傳輸和調(diào)制波前的作用。通過模擬高斯光束垂直入射至不同厚度的零折射平板,我們觀察到了零折射特異電磁介質(zhì)的無相位延遲傳輸。隨后通過設(shè)計不同結(jié)構(gòu)的出射面,實(shí)現(xiàn)了對輸出波前的調(diào)控,包括出射波前為柱面、分束和任意曲面；第四章,零折射率附近存在光波無法耦合進(jìn)入磁性特異電磁介質(zhì)的工作頻率,該頻率下入射高斯光可能會發(fā)生全反射。經(jīng)過優(yōu)化我們發(fā)現(xiàn)在某些合適的頻率下存在1至2個波長的古斯-漢欣位移。這種效應(yīng)在垂直入射時同樣出現(xiàn),而傳統(tǒng)光學(xué)中垂直入射因光路可逆不可能出現(xiàn)古斯-漢欣位移,展示了旋磁體系存在的非互易性。
[Abstract]:Specific electromagnetic media is an artificial subwavelength unit array. The electromagnetic properties of traditional materials are derived from atoms and molecules, and the specific electromagnetic media give us the "atom" of the subwavelength scale. Therefore, the specific electromagnetic media can achieve the nature of nature very difficult to achieve, such as electromagnetic wave stealth, negative refracting material, zero. Refracting materials, super-resolution and other non reciprocal phenomena that break through the diffraction limit, etc.. Specific electromagnetic media are not only limited to special electromagnetic properties. In order to increase their flexibility and freedom in design and application, specific electromagnetic media can also be regulated. The specific electromagnetic medium is due to the singular electromagnetically and controllable properties. Microwave, terahertz, infrared and visible light waves are widely studied. In this paper, we study three characteristics of temperature regulated magnetic specific electromagnetic media, zero refraction characteristics and Guth Han Xin displacement near zero refraction in the microwave frequency band. This paper includes four chapters. The first chapter is the thread, the research background and theory are introduced. The other three chapters are introduced. In the second chapter, the magnetic specific electromagnetic medium has been implemented in theory and experiment with applied magnetic field control. Considering the effect of temperature on ferrite, we have theoretically designed the use of temperature to regulate magnetic specific electromagnetic media. The use of temperature control instead of the external magnetic field increases the degree of freedom of control; the third chapter, The equivalent dielectric constant and permeability equal to zero are equal to zero and the zero refraction specific electromagnetic medium has the effect of no phase delay transmission and modulation wave. By simulating the vertical incident of Gauss beam to the zero refraction plate of different thickness, we observed the non phase delay transmission of the zero refraction specific electromagnetic medium. The output wavefront of the same structure is regulated by the output wave front, which includes the ejection wave front as the cylinder, the beam splitter and the arbitrary surface. In the fourth chapter, the frequency of the light wave can not be coupled into the magnetic specific electromagnetic medium near the zero refraction rate, and the incident Gauss light may produce full reflection at this frequency. There are 1 to 2 wavelengths at the frequency of the Guth Han Xin displacement. This effect appears equally at the vertical incidence, while the vertical incidence of the traditional optics is not possible because of the reversibility of the optical path, which shows the non reciprocity of the magnetic flux system.

【學(xué)位授予單位】：浙江師范大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TB39

【相似文獻(xiàn)】

相關(guān)會議論文 前3條

1 趙明v，

本文編號：1862487