Trapped modes with extremely high quality factor in a circular array of dielectric nanorods

doi:10.1364/OL.43.005403

	Trapped modes with extremely high quality factor in a circular array of dielectric nanorods
	Han, Hai-Long 1; Li, He 1; Lu, Hm-Bin 1; Liu, Xiaoping2,3
	2018-11
发表期刊	OPTICS LETTERS
ISSN	0146-9592
卷号	43 期号:21 页码:5403-5406
发表状态	已发表
DOI	10.1364/OL.43.005403
摘要	In this Letter, we investigate the formation of trapped modes with near-zero group velocities in a ring chain composed of dielectric nanorods. Two kinds of bound modes are successfully identified: the regular below-continuum-resonance (BCR) modes formed at the band edge and importantly the quasi-bound-states-in-the-continuum (BIC) trapped modes (similar to the BIC in the equivalent infinite linear chain). The lowest-order trapped mode possesses the highest Q factor, which scales exponentially with the number of nanorods N as Q similar to exp(0.325N) for the BCR and Q similar to exp(0.662N) for the quasi-BIC. Interestingly, a moder ate high Q factor similar to 10(5) can be obtained for the quasi-BIC mode even with a very small N= 8. This suggests that our nanorod-based ring resonator possesses a dear advantage over the linear chain for the same N. Our findings greatly expand the application scope of BIC-based phenomena. (C) 2018 Optical Society of America
收录类别	SCI ; SCIE ; EI
语种	英语
WOS研究方向	Optics
WOS类目	Optics
WOS记录号	WOS:000448939000059
出版者	OPTICAL SOC AMER
EI入藏号	20184606053191
EI主题词	Chains ; Optical resonators ; Q factor measurement
EI分类号	Mechanical Drives:602.1 ; Optical Devices and Systems:741.3 ; Nanotechnology:761 ; Solid State Physics:933 ; Electric Variables Measurements:942.2
WOS关键词	GROUP-VELOCITY ; WAVE-GUIDES ; SLOW-LIGHT ; PHOTONIC CRYSTALS ; MICROCAVITY ; NANOPARTICLES ; ENHANCEMENT ; SILICON ; CHAINS ; LASER
原始文献类型	Article
引用统计
文献类型	期刊论文
条目标识符	https://kms.shanghaitech.edu.cn/handle/2MSLDSTB/28296
专题	物质科学与技术学院_PI研究组_刘晓平组
通讯作者	Lu, Hm-Bin
作者单位	1.Nanjing Univ, Natl Lab Solid State Microstruct, Collaborat Innovat Ctr Adv Microstruct, Coll Engn & Appl Sci, Nanjing 210093, Jiangsu, Peoples R China 2.ShanghaiTech Univ, Sch Phys Sci & Technol, Shanghai 201210, Peoples R China 3.CAS Shanghai Inst Microsyst & Informat Technol SI, Shanghai 200050, Peoples R China
推荐引用方式 GB/T 7714	Han, Hai-Long,Li, He,Lu, Hm-Bin,et al. Trapped modes with extremely high quality factor in a circular array of dielectric nanorods[J]. OPTICS LETTERS,2018,43(21):5403-5406.
APA	Han, Hai-Long,Li, He,Lu, Hm-Bin,&Liu, Xiaoping.(2018).Trapped modes with extremely high quality factor in a circular array of dielectric nanorods.OPTICS LETTERS,43(21),5403-5406.
MLA	Han, Hai-Long,et al."Trapped modes with extremely high quality factor in a circular array of dielectric nanorods".OPTICS LETTERS 43.21(2018):5403-5406.