Manipulation of surface phonon polaritons in Si C nanorods

作     者：Yuehui Li Ruishi Qi Ruochen Shi Ning Li Peng Gao 李跃辉;亓瑞时;时若晨;李宁;高鹏

作者机构：International Center for Quantum MaterialsPeking UniversityBeijing 100871China Electron Microscopy LaboratorySchool of PhysicsPeking UniversityBeijing 100871China Collaborative Innovation Center of Quantum MatterBeijing 100871China 

基　　金：We gratefully acknowledge the support from the“2011 Program”Peking-Tsinghua-IOP,China Collaborative Innovation Center of Quantum Matter.The authors acknowledge Electron Microscopy Laboratory of Peking University,China for the use of Cs corrected electron microscope.This work was supported by the National Natural Science Foundation of China(11974023,51672007) the National Key R&D Program of China(2016YFA0300804) the National Equipment Program of China(ZDYZ2015-1) the Key-Area Research and Development Program of Guangdong Provience(2018B030327001,2018B010109009) 

出 版 物：《Science Bulletin》 (科学通报（英文版）)

年 卷 期：2020年第65卷第10期

页      码：820-826,M0004页

摘      要：Surface phonon polaritons(SPh Ps) are potentially very attractive for subwavelength control and manipulation of light at the infrared to terahertz wavelengths. Probing their propagation behavior in nanostructures is crucial to guide rational device design. Here, aided by monochromatic scanning transmission electron microscopy-electron energy loss spectroscopy technique, we measure the dispersion relation of SPh Ps in individual Si C nanorods and reveal the effects of size and shape. We find that the SPh Ps can be modulated by the geometric shape and size of Si C nanorods. The energy of SPh Ps shows redshift with decreasing radius and the surface optical phonon is mainly concentrated on the surface with large radius. Therefore, the fields can be precisely confined in specific positions by varying the size of the nanorod, allowing effective tuning at nanometer scale. The findings of this work are in agreement with dielectric response theory and numerical simulation, and provide novel strategies for manipulating light in polar dielectrics through shape and size control, enabling the design of novel nanoscale phononphotonic devices.

主 题 词：Surface phonon polariton Nanophotonics Nanostructure Geometry manipulation Phononic materials 

学科分类：07[理学] 070205[070205] 08[工学] 080501[080501] 0805[工学-能源动力学] 0702[理学-物理学类] 

核心收录：

D　O　I：10.1016/j.scib.2020.02.026

馆 藏 号：203888797...