共查询到20条相似文献,搜索用时 73 毫秒
1.
光子晶体光纤具有较大的负色散,可用于高速长距离光纤通信系统的色散补偿。文中主要讨论了大空气孔光子晶体光纤的模式分析、材料色散、波导色散,以及在通信波长范围内的总色散与芯径变化的规律。并通过计算机仿真,给出了计算结果。 相似文献
2.
3.
金属银掺杂光子晶体的缺陷模 总被引:2,自引:0,他引:2
引入消光系数并利用特征矩阵法,研究了一维银掺杂光子晶体的反射光和透射光中TE波和TM波的缺陷模随入射角和银的光学厚度的变化规律.得出:在反射光中TE波和TM渡都出现了明显的缺陷模,缺陷模随入射角的增加而减弱,而缺陷模不随银的光学厚度的变化而变化.在透射光中TE波和TM波出现了很弱的缺陷模,缺陷模随银的光学厚度的增加而迅速消失.Abstract: By leading into the extinction coefficient and making use of the characteristic matrix method,the defect mode of TE wave and TM wave of Ag doping photonic crystal are studied in reflected light and refracted light.In reflected light,there are obvious defect modes of TE wave and TM wave,and the defect modes decrease with the increment of incident angle,but does not change with the optical thickness of Ag.In refracted light,there are very weak defect modes of TE wave and TM wave,and they decrease quickly with the increment of the optical thickness of Ag. 相似文献
4.
一维掺杂光子晶体的缺陷模和偏振特性研究 总被引:9,自引:1,他引:9
利用特征矩阵法研究了两种偏振光通过一维掺杂光子晶体的缺陷模特征和偏振特性,结果表明:S偏振光的缺陷模对应的入射角随着入射波长的增大而增大,而P偏振光的缺陷模对应的入射角却随着入射波长的增大而减小;P偏振光存在明显的"广义布儒斯特角"对应的允许带,其"广义布儒斯特角"随着入射波长的增大而减小,S偏振光不存在"广义布儒斯特角". 相似文献
5.
6.
7.
8.
9.
10.
11.
利用传输矩阵的方法给出了光波在一维各向异性掺杂光子晶体中传播的透射率,研究了缺陷模的相关特性,经数值模拟计算得出:光通过一维各向异性掺杂光子晶体后,透射波中TE波和TM波存在明显的缺陷模,缺陷模的中心波长位置随光波入射角的改变而不同,两个缺陷模能完全分开;TE波的缺陷模中心波长位置随着光学厚度的增大向短波方向移动,TM... 相似文献
12.
O. Gauthier-Lafaye D. Mulin S. Bonnefont X. Checoury J.-M. Lourtioz A. Talneau F. Lozes-Dupuy 《Photonics Technology Letters, IEEE》2005,17(8):1587-1589
Lasing of W1 square lattice-based photonic crystal lasers on the substrate approach is analyzed. A second-order distributed feedback highly monomode behavior is observed. A comprehensive two-dimensional and three-dimensional finite-difference time-domain computation analysis shows that this characteristic arises from the lattice geometry. Single-mode lasers can be obtained using this geometry, opening the way to the realization of monomode laser arrays. 相似文献
13.
为了设计出具有特殊光学特性的晶体,在不考虑色散的基础上,采用传输矩阵法对缺陷层为增益介质的1维三元光子晶体的光学特性进行了理论分析和数值模拟,主要研究了在0.242μm处能获得最大光放大时所对应的增益介质的厚度及光学常数,并讨论了当中心波长变化时的光放大特点。结果表明,当中心波长为0.3μm时,中心波长两侧存在着对应的禁带,改变缺陷层厚度及光学常数对该带隙结构的影响很小;但通带边0.242μm波长处获得很强的光放大。这一结果为今后获得具有所需特征缺陷的光子晶体提供了理论指导。 相似文献
14.
By means of a transfer matrix method,this paper deduces the transmittance calculation equation of light travellinginlocallydoped(includingonedefectlayer)mirrorheterostructure(ABCCBA)PD(ABCCBA)Qphotonic crystals.In the cases of defect layers being either introduced or not introduced,an ORIGIN simulation shows the influence of incident angle change on the number of photon band gap,bandwidth and defect mode numbers.Studies indicate that when such photonic crystals have 8 mirror cycles and the thickness of defect layer D meets nD dD D0=2 or nD dD D40,the photonic crystal defect mode transmission peak changes significantly.Also,with the change of incident angle,the number of defect mode transmission peaks changes.By altering incident angle and defect layer thickness,we can get photon band gaps and defect mode transmission peaks at different frequency domains and different relative angular frequencies.This provides theoretical reference for achieving light wave multi-channel filtering and tunable filtering. 相似文献
15.
16.
Imada M. Noda S. Chutinan A. Mochizuki M. Tanaka T. 《Lightwave Technology, Journal of》2002,20(5):873-878
This paper describes a theoretical and experimental analysis of the channel drop filter using a single defect formed near the two-dimensional (2-D) photonic crystal slab waveguide. First, we calculate the transmission spectrum of a 2-D photonic crystal waveguide and show that high transmittance for a wide wavelength range (/spl sim/60 nm) is obtained in the 1.55-/spl mu/m region. We also show that a defect state having a wavelength within the high transmission wavelength range can be formed in the photonic bandgap by introducing a single defect of appropriate radius. Next, we fabricate several devices and show that the emission wavelength from each defect can be tuned by changing the defect radius. The measured tuning characteristics coincide well with the calculated results. From the near-field pattern of the device, we estimate the emission efficiency of the present device at almost a few tens percent. We clarify the structural condition in order to obtain the maximum output efficiency and show that tuning of emission wavelength while maintaining high output efficiency is possible by selecting appropriate defect radius and position. Based on these results, we propose an ultrasmall channel drop filter for a wavelength-division-multiplex optical communication system. 相似文献
17.
一维缺陷光子晶体多个禁带中的窄带缺陷模 总被引:2,自引:1,他引:1
用特征矩阵法研究了一维缺陷光子晶体的透射谱。结果发现:在一维缺陷光子晶体的透射谱中的多个禁带内都有窄带缺陷模,窄带缺陷模的波长越大,其宽度越大;当入射角增大后,波长越长的窄带缺陷模的强度变化越小,位置向短波方向移动越多,且S偏振光与P偏振光的窄带缺陷模的分离越大;增大一维缺陷光子晶体中周期性介质的厚度,窄带缺陷模的波长和移动的范围都增大。本研究对一维缺陷光子晶体的窄带缺陷模的选择使用具有重要意义。 相似文献
18.
本文利用光学传输矩阵理论,对一维光子晶体缺陷层存在和不存在时光子晶体缺陷模进行了研究。计算表明:在计算模型中缺陷层存在与否,都可以产生缺陷模,并从产生机理上给予了解释。计算了不同周期厚度与光的入射角对光子晶体缺陷模的影响,得到了单缺陷层时,双模产生的条件及随缺陷层光学厚度变化的规律,得到的一些结论将有助于我们更好的理解和进一步开发光子晶体的应用。 相似文献
19.