高品质因子 Fano 共振全介质超材料
光学
2014-08-19 v2
摘要
电磁诱导透明 (EIT) 的超表面类似物在过去几年中一直是纳米光子学领域的主要焦点,因为它们能够产生高品质因子 (Q-factor) 共振,适用于低损耗慢光器件和高灵敏度光学传感器等应用。然而,欧姆损耗将传统等离子体 EIT 超表面的可实现 Q 因子限制在小于 10 的值,严重阻碍了器件性能。在此,我们报道了使用全介质硅基超表面的 EIT 经典类似物的实验演示。由于极低的吸收损耗和相邻超原子的相干相互作用,实验观测到创纪录的高 Q 因子 483,从而实现了一种品质因数 (FOM) 为 103 的折射率传感器。此外,我们展示了可以对介质超表面进行工程设计,将光场限制在硅谐振器或环境中,从而能够在纳米尺度上定制光与物质的相互作用。
引用
@article{arxiv.1405.3901,
title = {High Quality Factor Fano-Resonant All-Dielectric Metamaterials},
author = {Yuanmu Yang and Ivan I. Kravchenko and Dayrl P. Briggs and Jason Valentine},
journal= {arXiv preprint arXiv:1405.3901},
year = {2014}
}
备注
Two errors have been corrected: 1. In the simulations, cross-polarized fields were mistakenly not included leading to artificially inflated Q-factors. 2. The measured arrays were later found to have a partially connected gap, preventing cross-polarized light scattering and preserving a high Q-factor. The new manuscript corrects these errors and examines fully connected ring-based resonators