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Title: Nonperiodic metallic gratings transparent for broadband terahertz waves

Abstract

In this work, we demonstrate both theoretically and experimentally that nonperiodic metallic gratings can become transparent for broadband terahertz waves. It is shown that broadband high transmission appears in aperiodic metallic gratings (including quasiperiodic and disordered ones), which originates from the nonresonant excitations in the grating system. Quasiperiodic and disordered metallic gratings effectively weaken and even eliminate Wood's anomalies, which are the diffraction-related characters of periodic gratings. Consequently, both the transparence bandwidth and transmission efficiency are significantly increased due to the structural aperiodicity. An optimal condition is also achieved for broadband high transparency in aperiodicmetallic gratings. Experimental measurements at the terahertz regime reasonably agree with both analytical analysis and numerical simulations. Furthermore, we show that for a specific light source, for example, a line source, a corresponding nonperiodic transparent grating can be also designed. We expect that our findings can be applied for transparent conducting panels, perfect white-beam polarizers, antireflective conducting solar cells, and beyond.

Authors:
; ; ; ; ; ;
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
Ministry of Science and Technology of the People's Republic of China; National Natural Science Foundation of China (NNSFC); USDOE Office of Science (SC)
OSTI Identifier:
1392420
DOE Contract Number:
AC02-06CH11357
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. B, Condensed Matter and Materials Physics; Journal Volume: 91; Journal Issue: 4
Country of Publication:
United States
Language:
English

Citation Formats

Ren, Xiao-Ping, Fan, Ren-Hao, Peng, Ru-Wen, Huang, Xian-Rong, Xu, Di-Hu, Zhou, Yu, and Wang, Mu. Nonperiodic metallic gratings transparent for broadband terahertz waves. United States: N. p., 2015. Web. doi:10.1103/PhysRevB.91.045111.
Ren, Xiao-Ping, Fan, Ren-Hao, Peng, Ru-Wen, Huang, Xian-Rong, Xu, Di-Hu, Zhou, Yu, & Wang, Mu. Nonperiodic metallic gratings transparent for broadband terahertz waves. United States. doi:10.1103/PhysRevB.91.045111.
Ren, Xiao-Ping, Fan, Ren-Hao, Peng, Ru-Wen, Huang, Xian-Rong, Xu, Di-Hu, Zhou, Yu, and Wang, Mu. Thu . "Nonperiodic metallic gratings transparent for broadband terahertz waves". United States. doi:10.1103/PhysRevB.91.045111.
@article{osti_1392420,
title = {Nonperiodic metallic gratings transparent for broadband terahertz waves},
author = {Ren, Xiao-Ping and Fan, Ren-Hao and Peng, Ru-Wen and Huang, Xian-Rong and Xu, Di-Hu and Zhou, Yu and Wang, Mu},
abstractNote = {In this work, we demonstrate both theoretically and experimentally that nonperiodic metallic gratings can become transparent for broadband terahertz waves. It is shown that broadband high transmission appears in aperiodic metallic gratings (including quasiperiodic and disordered ones), which originates from the nonresonant excitations in the grating system. Quasiperiodic and disordered metallic gratings effectively weaken and even eliminate Wood's anomalies, which are the diffraction-related characters of periodic gratings. Consequently, both the transparence bandwidth and transmission efficiency are significantly increased due to the structural aperiodicity. An optimal condition is also achieved for broadband high transparency in aperiodicmetallic gratings. Experimental measurements at the terahertz regime reasonably agree with both analytical analysis and numerical simulations. Furthermore, we show that for a specific light source, for example, a line source, a corresponding nonperiodic transparent grating can be also designed. We expect that our findings can be applied for transparent conducting panels, perfect white-beam polarizers, antireflective conducting solar cells, and beyond.},
doi = {10.1103/PhysRevB.91.045111},
journal = {Physical Review. B, Condensed Matter and Materials Physics},
number = 4,
volume = 91,
place = {United States},
year = {Thu Jan 01 00:00:00 EST 2015},
month = {Thu Jan 01 00:00:00 EST 2015}
}