| DOI | 10.1038/s41586-020-2181-4
|
| Observation of topologically enabled unidirectional guided resonances |
| Wang, Renjing1; Wang, Shengliu1,2; Dhar, Ankita1; Peralta, Christopher1,2; Pavletich, Nikola P.1,2
|
| 2020-03-11
|
| 发表期刊 | NATURE
 |
| ISSN | 0028-0836
|
| EISSN | 1476-4687
|
| 出版年 | 2020
|
| 卷号 | 580期号:7804页码:467-+ |
| 文章类型 | Article
|
| 语种 | 英语
|
| 国家 | Peoples R China; USA |
| 英文关键词 | Unidirectional radiation is important for various optoelectronic applications, such as lasers, grating couplers and optical antennas. However, almost all existing unidirectional emitters rely on the use of materials or structures that forbid outgoing waves-that is, mirrors, which are often bulky, lossy and difficult to fabricate. Here we theoretically propose and experimentally demonstrate a class of resonances in photonic crystal slabs that radiate only towards one side of the slab, with no mirror placed on the other side. These resonances, which we name '
unidirectional guided resonances'
, are found to be topological in nature: they emerge when a pair of half-integer topological charges(1-3) in the polarization field bounce into each other in momentum space. We experimentally demonstrate unidirectional guided resonances in the telecommunication regime by achieving single-side radiative quality factors as high as 1.6 x 10(5). We further demonstrate their topological nature through far-field polarimetry measurements. Our work represents a characteristic example of applying topological principles(4,5) to control optical fields and could lead to energy-efficient grating couplers and antennas for light detection and ranging.
Unidirectional radiation is achieved in a photonic crystal slab without the use of mirrors by merging a pair of topological defects carrying half-integer charges.
|
| 领域 | 地球科学
; 气候变化
; 资源环境
|
| 收录类别 | SCI-E
|
| WOS记录号 | WOS:000528065800016
|
| WOS关键词 | PHOTONIC BOUND-STATES
; RADIATION
|
| WOS类目 | Multidisciplinary Sciences
|
| WOS研究方向 | Science & Technology - Other Topics
|
| 引用统计 |
|
| 文献类型 | 期刊论文
|
| 条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/281108
|
| 专题 | 地球科学
资源环境科学
气候变化
|
| 作者单位 | 1.Mem Sloan Kettering Canc Ctr, Struct Biol Program, 1275 York Ave, New York, NY 10021 USA;
2.Mem Sloan Kettering Canc Ctr, Howard Hughes Med Inst, New York, NY 10021 USA
|
推荐引用方式
GB/T 7714 |
Wang, Renjing,Wang, Shengliu,Dhar, Ankita,et al. Observation of topologically enabled unidirectional guided resonances[J].
NATURE,2020,580(7804):467-+.
|
| APA |
Wang, Renjing,Wang, Shengliu,Dhar, Ankita,Peralta, Christopher,&Pavletich, Nikola P..(2020).Observation of topologically enabled unidirectional guided resonances.NATURE,580(7804),467-+.
|
| MLA |
Wang, Renjing,et al."Observation of topologically enabled unidirectional guided resonances".NATURE 580.7804(2020):467-+.
|
修改评论