Mode coupling and vertical radiation loss for whispering-gallery modes in 3-D microcavities
文献类型：期刊论文
| 作者 | Huang, YZ ; Yang, YD |
| 刊名 | journal of lightwave technology
 |
| 出版日期 | 2008 |
| 卷号 | 26期号:40068页码:1411-1416 |
| 关键词 | finite-difference time-domain technique (FDTD) microcavities optical resonators quality factor |
| ISSN号 | 0733-8724 |
| 通讯作者 | huang, yz, chinese acad sci, inst semicond, state key lab integrated optoelect, beijing 100083, peoples r china. |
| 中文摘要 | the characteristics of whispering-gallery modes (wgms) in 3-d cylindrical, square, and triangular microcavities with vertical optical confinement of semiconductors are numerically investigated by the finite-difference time-domain (fdtd) technique. for a microcylinder with a vertical refractive index 3.17/3.4/3.17 and a center layer thickness 0.2 mu m, q-factors of transverse electric (te) wgms around wavelength 1550 nm are smaller than 10(3), as the radius r < 4 mu m and reach the orders of 10(4) and 10(6) as r = 5 and 6 mu m, respectively. however, the q-factor of transverse magnetic (tm) wgms at wavelength 1.659 mu m reaches 7.5 x 10(5) as r = 1 mu m. the mode coupling between the wgms and vertical radiation modes in the cladding layer results in vertical radiation loss for the wgms. in the microcylinder, the mode wavelength of tm wgm is larger than the cutoff wavelength of the vertical radiation mode with the same mode numbers, so tm wgms cannot couple with the vertical radiation mode and have high q-factor. in contrast, te wgms can couple with the corresponding vertical radiation mode in the 3-d microcylinder as r < 5 mu m. however, the mode wavelength of the te wgm approaches (is larger than) the cutoff wavelength of the corresponding radiation modes at r = 5 mu m (6 mu m), so te wgms have high q-factors in such microcylinders too. the results show that a critical lateral size is required for obtaining high, q-factor te wgms in the 3-d microcylinder. for 3-d square and triangular microcavities, we also find that the q-factor of tm wgm is larger than that of te wgm. |
| 学科主题 | 光电子学 |
| 收录类别 | SCI |
| 语种 | 英语 |
| 公开日期 | 2010-03-08 |
| 源URL | [http://ir.semi.ac.cn/handle/172111/6602]  |
| 专题 | 半导体研究所_中国科学院半导体研究所（2009年前） |
| 推荐引用方式 GB/T 7714 | Huang, YZ,Yang, YD. Mode coupling and vertical radiation loss for whispering-gallery modes in 3-D microcavities[J]. journal of lightwave technology,2008,26(40068):1411-1416. |
| APA | Huang, YZ,&Yang, YD.(2008).Mode coupling and vertical radiation loss for whispering-gallery modes in 3-D microcavities.journal of lightwave technology,26(40068),1411-1416. |
| MLA | Huang, YZ,et al."Mode coupling and vertical radiation loss for whispering-gallery modes in 3-D microcavities".journal of lightwave technology 26.40068(2008):1411-1416. |
入库方式： OAI收割
来源：半导体研究所
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