Trapped modes with extremely high quality factor in a circular array of dielectric nanorods
Han, Hai-Long1; Li, He1; Lu, Hm-Bin1; Liu, Xiaoping2,3
2018-11
Source PublicationOPTICS LETTERS
ISSN0146-9592
Volume43Issue:21Pages:5403-5406
Status已发表
DOI10.1364/OL.43.005403
AbstractIn 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
Indexed BySCI ; EI
Language英语
WOS Research AreaOptics
WOS SubjectOptics
WOS IDWOS:000448939000059
PublisherOPTICAL SOC AMER
EI Accession Number20184606053191
EI KeywordsChains ; Optical resonators ; Q factor measurement
EI Classification NumberMechanical Drives:602.1 ; Optical Devices and Systems:741.3 ; Nanotechnology:761 ; Solid State Physics:933 ; Electric Variables Measurements:942.2
WOS KeywordGROUP-VELOCITY ; WAVE-GUIDES ; SLOW-LIGHT ; PHOTONIC CRYSTALS ; MICROCAVITY ; NANOPARTICLES ; ENHANCEMENT ; SILICON ; CHAINS ; LASER
Original Document TypeArticle
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttps://kms.shanghaitech.edu.cn/handle/2MSLDSTB/28296
Collection物质科学与技术学院_PI研究组_刘晓平组
Corresponding AuthorLu, Hm-Bin
Affiliation1.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
Recommended Citation
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.
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