本文選題：嚴(yán)格耦合波算法 + 微粒群優(yōu)化算法　； 參考：《哈爾濱工業(yè)大學(xué)》2016年碩士論文

【摘要】：當(dāng)物體的特征尺度接近熱輻射波的波長(zhǎng)時(shí),熱輻射將呈現(xiàn)出不同于傳統(tǒng)輻射現(xiàn)象的特殊性質(zhì),利用這種特性可以實(shí)現(xiàn)控制物體熱輻射特性的目的,光柵作為一種典型的周期性微結(jié)構(gòu),在太陽(yáng)能電池、微電子散熱、航天器熱控等方面有著廣泛的應(yīng)用。本文利用微結(jié)構(gòu)表面的光譜選擇特性,針對(duì)非晶硅薄膜太陽(yáng)能電池光電轉(zhuǎn)換效率較低的問(wèn)題設(shè)計(jì)出兩種陷光結(jié)構(gòu),使得其對(duì)太陽(yáng)光的吸收率明顯增強(qiáng),同時(shí)根據(jù)光柵特殊的光譜選擇特性對(duì)不同種類光柵參數(shù)進(jìn)行反演,為光柵結(jié)構(gòu)參數(shù)的非接觸檢測(cè)提供了一種新方法。本文中的正問(wèn)題算法采用嚴(yán)格耦合波算法,反問(wèn)題算法采用微粒群優(yōu)化算法。微結(jié)構(gòu)光柵表面的光譜輻射特性與宏觀尺度表面的光譜輻射特性產(chǎn)生差異的原因在于光柵表面可以激發(fā)表面等離子極化、表面聲子極化和磁極化,本文采用嚴(yán)格耦合波算法,研究了光柵結(jié)構(gòu)表面表現(xiàn)出波長(zhǎng)選擇性的機(jī)理。分析了光柵結(jié)構(gòu)表面等離子體的色散關(guān)系,同時(shí)利用LC等效電路模型對(duì)磁極化的激發(fā)條件進(jìn)行預(yù)測(cè),并將其應(yīng)用到非晶硅薄膜電池陷光結(jié)構(gòu)的設(shè)計(jì)中。為了增強(qiáng)非晶硅薄膜電池對(duì)太陽(yáng)光的吸收作用,本文首先研究了在薄膜電池基底上沉積金屬光柵的陷光結(jié)構(gòu)的光譜吸收特性。通過(guò)在吸收層和金屬光柵之間激發(fā)表面等離子極化增強(qiáng)對(duì)入射光的吸收,該陷光結(jié)構(gòu)可以顯著增強(qiáng)薄膜電池在近紅外區(qū)域的吸收作用;基于上述陷光結(jié)構(gòu),本文研究了分別在薄膜電池基底和頂部沉積光柵的陷光結(jié)構(gòu)的光譜吸收特性,該陷光結(jié)構(gòu)使得薄膜電池在0.3-0.5μm波段內(nèi)的吸收率明顯增強(qiáng)。同時(shí),本文利用微粒群優(yōu)化算法對(duì)光柵結(jié)構(gòu)參數(shù)進(jìn)行反演。反演對(duì)象包括槽型光柵、雙槽型光柵、基底層矩形光柵結(jié)構(gòu)薄膜電池、雙層光柵結(jié)構(gòu)薄膜電池。研究了參數(shù)變化對(duì)反演結(jié)果的影響,同時(shí)利用單波長(zhǎng)入射波不同角度入射時(shí)的反射率對(duì)光柵結(jié)構(gòu)進(jìn)行反演。
[Abstract]:When the characteristic scale of the object is close to the wavelength of the thermal radiation wave, the thermal radiation will be different from the traditional radiation, which can be used to control the thermal radiation characteristics of the object. As a typical periodic micro structure, the grating is used in solar energy pool, microelectronic heat dissipation, spacecraft thermal control and so on. In this paper, by using the spectral selection characteristics of the microstructural surface, two kinds of trap structures are designed for the problem of low photoelectric conversion efficiency of the amorphous silicon thin film solar cells, which makes the absorption rate of the solar light obviously enhanced. At the same time, the parameters of different kinds of grating are retrieved according to the special spectral selection characteristics of the grating. A new method is provided for non-contact detection of gate structure parameters. In this paper, a strict coupled wave algorithm is adopted and particle swarm optimization is adopted in the inverse problem algorithm. The reason for the difference between the spectral radiation characteristics of the micro structure grating surface and the spectral radiation characteristics of the macro scale surface is that the surface of the grating can excite the surface. Plasma polarization, surface phonon polarization and magnetic polarization. In this paper, a rigorous coupled wave algorithm is used to study the mechanism of wavelength selectivity on the surface of the grating structure. The dispersion relation of the surface plasma of the grating structure is analyzed. At the same time, the excitation conditions of the magnetic polarization are predicted by the LC equivalent circuit model and applied to the amorphous silicon thin. In the design of the trapping structure of a membrane cell, in order to enhance the absorption of the solar light by the amorphous silicon thin film battery, the absorption characteristics of the trapping structure of the metal grating deposited on the substrate of the film battery were first studied. The absorption of the incident light was enhanced by the polarization of the surface excited by the absorption layer and the metal grating. The absorption of thin film cells in the near infrared region can be significantly enhanced. Based on the above structure, the spectral absorption characteristics of the trapping structures deposited on the substrate and the top of the thin film battery are studied. The absorption rate of the thin film battery in the 0.3-0.5 mu m band is obviously enhanced. The particle swarm optimization algorithm is used to invert the structure parameters of the grating. The inversion objects include groove gratings, double groove gratings, thin film cells of rectangular grating structure on the base layer, double grating structure film batteries. Row inversion.
【學(xué)位授予單位】：哈爾濱工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2016
【分類號(hào)】：TM914.4
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本文編號(hào)：1939153