【摘要】：現(xiàn)代電子器件的小型化、精密化,使得亞波長量級(jí)上實(shí)現(xiàn)對(duì)信息的傳輸及處理成為新的難題。傳統(tǒng)的光纖等光子器件能夠高速傳輸信號(hào),但是由于衍射極限的限制,其尺寸很難在納米量級(jí)得到實(shí)現(xiàn)。金屬納米結(jié)構(gòu)超材料因其能夠在納米尺度上實(shí)現(xiàn)對(duì)光的傳導(dǎo)及操縱得到了廣泛的重視。而超材料的許多新奇特性將使電子學(xué)和光子學(xué)更好地結(jié)合,在軍事等多個(gè)領(lǐng)域均有重大的意義。本文的工作主要是從理論和實(shí)驗(yàn)上探究銀納米線復(fù)合結(jié)構(gòu)的一些光學(xué)性質(zhì)和應(yīng)用。應(yīng)用亥姆霍茲方程和相應(yīng)的邊界條件,建立x-y坐標(biāo)系,推導(dǎo)得出了激發(fā)表面等離子體的各向同性介質(zhì)和各向異性介質(zhì)的波矢匹配條件;應(yīng)用矩陣運(yùn)算的方法,采用逐層傳輸?shù)姆绞酵茖?dǎo)了復(fù)合結(jié)構(gòu)介質(zhì)中無限大平面間的反射和透射的表達(dá)式。根據(jù)銀納米線復(fù)合結(jié)構(gòu)的反射和透射的推導(dǎo)結(jié)果,我們應(yīng)用MATLAB模擬計(jì)算得到了三種復(fù)合結(jié)構(gòu):棱鏡-銀-空氣結(jié)構(gòu)、棱鏡-銀納米線-空氣結(jié)構(gòu)和棱鏡-銀-銀納米線-空氣結(jié)構(gòu)的反射譜吸收峰等光學(xué)性質(zhì),如在某一范圍的波長內(nèi)吸收峰的位置和峰值大小的變化規(guī)律;對(duì)參數(shù)可以使反射率達(dá)到最大等進(jìn)行了討論和探究,并根據(jù)結(jié)果對(duì)結(jié)構(gòu)進(jìn)行理論上的優(yōu)化。模擬計(jì)算了三種復(fù)合結(jié)構(gòu)下,反射譜對(duì)于外層空氣折射率微小變化的靈敏度,并進(jìn)行參數(shù)上的優(yōu)化和改進(jìn),這可以提高其對(duì)于材料外界折射率變化的靈敏度,對(duì)于探測和傳感等領(lǐng)域具有重大意義。實(shí)驗(yàn)上分別用分光計(jì)法和幾何測量法對(duì)銀納米線復(fù)合結(jié)構(gòu)的玻璃基底進(jìn)行了不平行度的測量;實(shí)驗(yàn)中使用P偏振光作為入射光,使其從玻璃一側(cè)和納米線一側(cè)分別入射,根據(jù)測量的結(jié)果得到了一般的規(guī)律。在以白光為光源,波長范圍為300 nm~800 nm條件下,探究了銀納米線復(fù)合結(jié)構(gòu)的透射譜的特點(diǎn),如吸收峰的數(shù)量,吸收峰的強(qiáng)度變化等。
[Abstract]:With the miniaturization and precision of modern electronic devices, it is a new problem to realize the transmission and processing of information in the sub-wavelength level. Traditional photonic devices such as optical fibers can transmit signals at high speed, but because of the limitation of diffraction limit, its size is difficult to be realized in nanometer scale. Metal nanostructured supermaterials have been paid more and more attention because of their ability to conduct and manipulate light on the nanometer scale. However, many novel properties of supermaterials will make electronics and photology better combined, and will be of great significance in many fields, such as military affairs. The main work of this paper is to explore some optical properties and applications of silver nanowires composite structure theoretically and experimentally. By using Helmholtz equation and the corresponding boundary conditions, the x 鈮，

本文編號(hào)：2481197