Normal incidence narrowband transmission filtering in zero-contrast gratings
Optics
2015-12-01 v1
Abstract
We report narrowband transmission filtering based on zero-contrast grating (ZCG) reflectors at normal incidence. Computational results show that the filtering is realized through symmetry-protected modes coupling. The guided modes introduced by the slab layer make the filter frequencies flexible to modify. The rectangular structure of the filter allows simple fabrication and integration into optical systems. The quality factor of the filters could exceed 106. Owing to the low refraction index dispersion of the semiconductor and their scale-invariant operations, these filters can be applied in a broad infrared range from near infrared to terahertz wavelengths.
Keywords
Cite
@article{arxiv.1511.08968,
title = {Normal incidence narrowband transmission filtering in zero-contrast gratings},
author = {Xuan Cui and Hao Tian and Yan Du and Peng Tan and Guang Shi and Zhongxiang Zhou},
journal= {arXiv preprint arXiv:1511.08968},
year = {2015}
}