【摘要】：近年來,隨著化學(xué)合成技術(shù)以及微加工技術(shù)的不斷提高,小尺度的全光集成光學(xué)器件發(fā)展非常迅速。在全光集成光學(xué)器件中,控制光束轉(zhuǎn)向的器件是一個(gè)重要的組成部分。 本文著重研究了基于亞波長共振的光束轉(zhuǎn)向器的設(shè)計(jì)和性能分析。結(jié)合仿真分析,我們得出了光束轉(zhuǎn)向器的透射和反射曲線隨著入射光的角度和波長變化情況。進(jìn)而討論該結(jié)構(gòu)應(yīng)用于全光集成光學(xué)器件的可行性。主要內(nèi)容如下： 1)分析了均勻半徑的硅納米棒陣列對斜入射高斯光束負(fù)方向出射現(xiàn)象的原因。理論解釋了這個(gè)機(jī)制是由于介質(zhì)納米棒截面的對稱共振模式引起的。這個(gè)現(xiàn)象有望應(yīng)用于集成光路中作為光束轉(zhuǎn)向的器件。 2)仿真設(shè)計(jì)了兩種半徑的硅納米棒周期陣列結(jié)構(gòu),使得該結(jié)構(gòu)對特定波長的斜入射高斯光束的出射方向的調(diào)制作用比已有的結(jié)構(gòu)效率明顯提高。在入射光的波長為1550nm附近80nm的范圍內(nèi),在負(fù)方向出射的光束的能量可以占總能量95%以上。特別是在波長在1550nm附近入射角范圍在30°到60°之內(nèi),效率可以接近100%。這個(gè)結(jié)構(gòu)用于全光集成器件中可以有效減少由于光彎曲傳輸造成的損耗。 本文的主要?jiǎng)?chuàng)新點(diǎn)有： 1)提出了大小不同兩種半徑的硅納米棒組成的陣列會比單種半徑硅納米棒組成的陣列對光束偏轉(zhuǎn)的效率高。 2)通過仿真計(jì)算證明了基于二維所設(shè)計(jì)的光束轉(zhuǎn)向器在三維的情況下也可以達(dá)到預(yù)計(jì)的效果。
[Abstract]:In recent years, with the continuous improvement of chemical synthesis technology and micromachining technology, small-scale all-optical integrated optical devices have developed very rapidly. In all-optical integrated optical devices, the device that controls beam steering is an important part. In this paper, the design and performance analysis of beam steering gear based on subwavelength resonance are studied. Combined with the simulation analysis, we obtain the variation of the transmission and reflection curves of the beam steering gear with the angle and wavelength of the incident light. Furthermore, the feasibility of applying the structure to all-optical integrated optical devices is discussed. The main contents are as follows: 1) the reason why the uniform radius silicon nanorods array emits in the negative direction of oblique incident Gaussian beams is analyzed. The theory explains that this mechanism is caused by the symmetric resonance mode of the cross section of the dielectric nanorods. This phenomenon is expected to be used as a beam steering device in the integrated optical path. 2) two kinds of radius silicon nanorods periodic array structures are simulated and designed, so that the modulation effect of this structure on the outgoing direction of oblique incident Gaussian beams of specific wavelength is obviously higher than that of the existing structures. In the range of 80nm near 1550nm, the energy of the beam emitted in the negative direction can account for more than 95% of the total energy. Especially when the wavelength is in the range of 30 擄to 60 擄near 1550nm, the efficiency can be close to 100%. This structure can effectively reduce the loss caused by optical bending transmission in all-optical integrated devices. The main innovations of this paper are as follows: 1) it is proposed that the array composed of silicon nanorods with different radii is more efficient than the array composed of single radius silicon nanorods for beam deflection. 2) the simulation results show that the beam steering gear based on two-dimensional design can also achieve the expected effect in three-dimensional case.
【學(xué)位授予單位】：北京郵電大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：O436.2;TB383.1

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本文編號：2485300