Hyperbolic whispering-gallery phonon polaritons in boron nitride nanotubes

被引：29

作者：

Guo, Xiangdong ^{[1
,2
]}

Li, Ning ^{[3
]}

Yang, Xiaoxia ^{[1
,2
]}

Qi, Ruishi ^{[3
]}

Wu, Chenchen ^{[1
,2
]}

Shi, Ruochen ^{[3
]}

Li, Yuehui ^{[3
]}

Huang, Yang ^{[4
]}

de Abajo, F. Javier Garcia ^{[5
,6
,9
]}

Wang, En-Ge ^{[7
,8
]}

Gao, Peng ^{[3
,7
]}

Dai, Qing ^{[1
,2
]}

机构：

[1] Natl Ctr Nanosci & Technol, CAS Ctr Excellence Nanosci, CAS Key Lab Nanophoton Mat & Devices, CAS Key Lab Standardizat & Measurement Nanotechnol, Beijing, Peoples R China

[2] Univ Chinese Acad Sci, Ctr Mat Sci & Optoelect Engn, Beijing, Peoples R China

[3] Peking Univ, Interdisciplinary Inst Light Element Quantum Mat &, Acad Adv Interdisciplinary Studies, Int Ctr Quantum Mat,Electron Microscopy Lab,Sch Ph, Beijing, Peoples R China

[4] Hebei Univ Technol, Sch Mat Sci & Engn, Hebei Key Lab Boron Nitride Micro & Nano Mat, Tianjin, Peoples R China

[5] Barcelona Inst Sci & Technol, Inst Ciencies Foton, ICFO, Castelldefels, Barcelona, Spain

[6] ICREA Institucio Catalana Recerca & Estudis Avanca, Barcelona, Spain

[7] Collaborat Innovat Ctr Quantum Matter, Beijing, Peoples R China

[8] Chinese Acad Sci, Inst Phys, Songshan Lake Mat Lab, Guangdong, Peoples R China

[9] Liaoning Univ, Sch Phys, Shenyang, Peoples R China

来源：

NATURE NANOTECHNOLOGY | 2023年 / 18卷 / 05期

基金：

中国国家自然科学基金; 欧洲研究理事会;

关键词：

FREE-ELECTRONS; NANOSPECTROSCOPY; PLASMONS; CAVITIES;

D O I：

10.1038/s41565-023-01324-3

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Light confinement in nanostructures produces an enhanced light-matter interaction that enables a vast range of applications including single-photon sources, nanolasers and nanosensors. In particular, nanocavity-confined polaritons display a strongly enhanced light-matter interaction in the infrared regime. This interaction could be further boosted if polaritonic modes were moulded to form whispering-gallery modes; but scattering losses within nanocavities have so far prevented their observation. Here, we show that hexagonal BN nanotubes act as an atomically smooth nanocavity that can sustain phonon-polariton whispering-gallery modes, owing to their intrinsic hyperbolic dispersion and low scattering losses. Hyperbolic whispering-gallery phonon polaritons on BN nanotubes of similar to 4 nm radius (sidewall of six atomic layers) are characterized by an ultrasmall nanocavity mode volume (V-m approximate to 10(-10)lambda(3)(0) at an optical wavelength lambda(0) approximate to 6.4 mu m) and a Purcell factor (Q/V-m) as high as 10(12). We posit that BN nanotubes could become an important material platform for the realization of one-dimensional, ultrastrong light-matter interactions, with exciting implications for compact photonic devices.

引用

页码：529 / +

页数：8

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