物理学报2024，Vol.73Issue(2)：23-32,10.DOI:10.7498/aps.73.20231351
球形双曲色散超材料腔的多重窄带回音廊模式及透明显示应用
Multiple narrowband whispering-gallery model and transparent display applications of spherical hyperbolic dispersive metamaterial cavity
摘要
Abstract
A novel spherical hyperbolic metamaterial(HMM)cavity for enhancing color-transparent display is designed in this work.This HMM cavity consists of a silver core wrapped alternatively by several dielectric layers and silver layers.According to the effective medium theory and Mie scattering theory,we demonstrate that such an HMM cavity supports multiple whispering-gallery modes with deep subwavelength characteristics.The number of whispering-gallery modes with the same angular momentum is equal to the number of silver layers within the HMM cavity.Furthermore,we demonstrate that these excited whispering-gallery modes are capable of strongly confining the electric fields within the different dielectric shell layers,thus reducing Ohmic losses and narrowing resonance linewidths.In addition,we systematically investigate how the structure parameters affect whispering-gallery modes for an HMM cavity with 5 alternative dielectric layers and silver layers.Interestingly,by increasing the thickness of outermost dielectric layer and silver layer,the resonance wavelength of TM1,2 mode and TM1,3 mode remain nearly unchanged.However,the TM1,1 mode experiences a significant blueshift,and the intensity of the TM1,1,TM1,2 and TM1,3 mode can be substantially tuned.Consequently,through structural optimization,the HMM cavity can support triple narrowband resonances in the red,green,and blue spectral regions.Finally,we show that the HMM cavity exhibits dipole radiation characteristics at the three resonance wavelengths,effectively confining light within an angular range from-45° to +45° relative to the incident light direction,and confirming the scattered light viewed from a wide angle.These features make the HMM cavity suitable for achieving high transparency,brightness,and wide viewing angles in full-color transparent displays.关键词
双曲色散超材料腔/米氏散射/回音廊模式/透明显示器Key words
hyperbolic metamaterial cavity/Mie scattering/whispering-gallery mode/transparent display引用本文复制引用
李艳,任思萌,褚博,燕汝江,于群星,孙辉,邵立,钟发成..球形双曲色散超材料腔的多重窄带回音廊模式及透明显示应用[J].物理学报,2024,73(2):23-32,10.基金项目
河南省高等学校重点研究项目计划基础专项(批准号:23ZX018)、国家自然科学基金(批准号:11704344)和河南省高等学校研究项目(批准号:22A140030)资助的课题. Project supported by the Key Research Projects of Colleges and Universities of Henan Province,China(Grant No.23ZX018),the National Natural Science Foundation of China(Grant No.11704344),and the Research Projects of Colleges and Universities of Henan Province,China(Grant No.22A140030). （批准号:23ZX018）
