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首页> 外文期刊>Journal of Physics, D. Applied Physics: A Europhysics Journal >A reduced symmetric 2D photonic crystal cavity with wavelength tunability
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A reduced symmetric 2D photonic crystal cavity with wavelength tunability

机译：具有波长可调性的减小的对称2D光子晶体腔

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摘要

In this paper, we propose a microcavity supported by a designed photonic crystal structure that provides both tunability of cavity modes and the cavity's quality factor. A low symmetric defect region provides a trigger effect for the frequency shifting by means of rotational manipulation of small symmetry elements. Deviation of the effective tilling ratio as a result of rotational modification within the defect region results in the emanation of cavity modes at different frequencies. Here, we numerically demonstrate the frequency shifting for each obtained mode with respect to the defect region architecture. In addition to wavelength tunability, quality factor, mode volume, and Purcell factors are analyzed for the slightly modified structures. Besides, electric field distributions and polarization properties of each mode that emerge at distinct frequencies have been studied at adjusted frequency modes which are observed for all rotational modification scenarios as theta(Rot) = [0 degrees, 15 degrees, 30 degrees, 45 degrees]. After the investigations in 2D of silicon material (epsilon(r) = 12), 3D simulations are performed and the collected data is used for the height approximation of 3D structures to approach the results consistent with 2D ones, thus the cross-checking of the quality factor acquired from the 2D simulation can be executed by comparison with 3D. Moreover, 2D and 3D simulations of alumina material (epsilon(r) = 9.61) in terms of mode analysis and quality factor have been repeated considering the microwave experiments. Therefore, experimental analysis is compared with the numerical results and good agreement between the two is found.
机译：在本文中，我们提出了一种由设计的光子晶体结构支撑的微胶囊，其提供腔模式的可调性和腔的质量因子。低对称缺陷区域为通过小对称元件的旋转操纵提供频率移位的触发效果。由于缺陷区域内的旋转修改的结果偏离有效耕作比导致不同频率的腔模式发射。这里，我们在数值上展示了关于缺陷区域架构的每个获得的模式的频率移位。除了波长可调性，质量因数，模式体积和PURCell因子，针对略微改造的结构分析。此外，已经研究了以不同旋转修改场景观察到的调整后频率以不同频率出现的每个模式的电场分布和偏振特性，该频率模式是如此（腐烂）= [0度，15度，30度，45度] 。在硅材料的2D调查（epsilon（R）= 12）之后，执行3D模拟，并且收集的数据用于3D结构的高度近似，以接近与2Dα保持一致的结果，从而接近可以通过与3D进行比较来执行从2D模拟中获取的质量因数。此外，考虑到微波实验，重复了在模式分析和质量因子方面的2D和3D模拟（Epsilon（R）= 9.61）。因此，将实验分析与数值结果进行比较，发现两者之间的良好一致性。

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