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Low-dimensional photonic crystals for integrated optics

机译:用于集成光学的低维光子晶体

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Photonic crystals (PCs), or photonic bandgap (PBG) materials, are periodic dielectric structures that forbid the propagation of electromagnetic waves in certain frequency ranges. Although a full PBG is only possible in three-dimensional (3D) PCs most of all the intriguing phenomena characteristic for wavelength-scale periodic structures can already be observed and utilized in 2D PCs (periodicity in one plane) and even in 1D ones (well known Bragg reflector). Since fabrication of 3D PCs is still a challenge a lot of research effort is devoted to PCs of lower dimensions. Defect waveguides in 2D PCs capable of light confinement and lossless guidance through sharp bends, open new routes for compact integrated circuits. Unique dispersion properties of PCs can be utilized for realizing efficient light sources, dispersion compensators, or very narrow band optical filters. In the first part of this talk I will give a short introduction explaining basic properties of photonic crystals and some possible applications. In the second part I will review the research on 1D and 2D photonic crystals at the Royal Institute of Technology (KTH). KTH research on 2D PCs, formed as air holes etched through InP based slab waveguides, started in 2000 as a part of the European consortium on Photonic Crystal Integrated Circuits (PCIC) dedicated to integrated optics applications for the 1.5 /spl mu/m telecommunication window. KTH has been focused on PC based optical filters, and has been active in both the fabrication, modelling, and optical characterization. In other KTH projects we have also dealt with optical filtering in ID PCs made as alternating layers of Si and SiO/sub 2/, and have recently started fabrication of 2D PCs in Si on SiO/sub 2/ substrate (silicon-on-insulator). Selected design examples as well as two recently realized filter demonstrators will be presented.
机译:光子晶体(PC)或光子带隙(PBG)材料是周期性的介电结构,禁止在某些频率范围内传播电磁波。尽管完整的PBG仅在三维(3D)PC中是可能的,但波长级周期性结构特征的所有有趣现象中的大多数都已经在2D PC(一个平面的周期性)甚至一维的PC中被观察和利用。已知的布拉格反射器)。由于3D PC的制造仍然是一个挑战,因此许多研究工作都集中在尺寸较小的PC上。二维PC中的缺陷波导能够限制光并通过急剧的弯曲进行无损引导,从而为紧凑型集成电路开辟了新的途径。 PC的独特色散特性可用于实现高效的光源,色散补偿器或非常窄带的滤光片。在本讲座的第一部分中,我将简要介绍光子晶体的基本特性以及一些可能的应用。在第二部分中,我将回顾皇家技术学院(KTH)对1D和2D光子晶体的研究。 KTH在2D PC上进行的KTH研究是通过基于InP的平板波导蚀刻的气孔形成的,该研究于2000年作为欧洲光子晶体集成电路联盟(PCIC)的一部分而启动,该联盟致力于1.5 / spl mu / m电信窗口的集成光学应用。 KTH一直专注于基于PC的滤光片,并且在制造,建模和光学表征方面一直很活跃。在其他KTH项目中,我们还处理了ID PC的光学滤波,这些ID PC是由Si和SiO / sub 2 /交替层制成的,并且最近已经开始在SiO / sub 2 /衬底上的Si中制造2D PC(绝缘体上硅) )。将介绍选定的设计实例以及两个最近实现的滤波器演示器。

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