TY - JOUR
T1 - Terahertz spoof surface-plasmon-polariton subwavelength waveguide
AU - Zhang, Ying
AU - Xu, Yuehong
AU - Tian, Chunxiu
AU - Xu, Quan
AU - Zhang, Xueqian
AU - Li, Yanfeng
AU - Zhang, Xixiang
AU - Han, Jiaguang
AU - Zhang, Weili
N1 - KAUST Repository Item: Exported on 2020-10-01
Acknowledgements: Ministry of Science and Technology of the People's Republic of China (MOST) (2014CB339800); National Natural Science Foundation of China (NSFC) (61420106006, 61422509, 61427814, 61575141, 61735012); National Science Foundation (NSF) (ECCS-1232081).
PY - 2017/12/13
Y1 - 2017/12/13
N2 - Surface plasmon polaritons (SPPs) with the features of subwavelength confinement and strong enhancements have sparked enormous interest. However, in the terahertz regime, due to the perfect conductivities of most metals, it is hard to realize the strong confinement of SPPs, even though the propagation loss could be sufficiently low. One main approach to circumvent this problem is to exploit spoof SPPs, which are expected to exhibit useful subwavelength confinement and relative low propagation loss at terahertz frequencies. Here we report the design, fabrication, and characterization of terahertz spoof SPP waveguides based on corrugated metal surfaces. The various waveguide components, including a straight waveguide, an S-bend waveguide, a Y-splitter, and a directional coupler, were experimentally demonstrated using scanning near-field terahertz microscopy. The proposed waveguide indeed enables propagation, bending, splitting, and coupling of terahertz SPPs and thus paves a new way for the development of flexible and compact plasmonic circuits operating at terahertz frequencies. (C) 2017 Chinese Laser Press
AB - Surface plasmon polaritons (SPPs) with the features of subwavelength confinement and strong enhancements have sparked enormous interest. However, in the terahertz regime, due to the perfect conductivities of most metals, it is hard to realize the strong confinement of SPPs, even though the propagation loss could be sufficiently low. One main approach to circumvent this problem is to exploit spoof SPPs, which are expected to exhibit useful subwavelength confinement and relative low propagation loss at terahertz frequencies. Here we report the design, fabrication, and characterization of terahertz spoof SPP waveguides based on corrugated metal surfaces. The various waveguide components, including a straight waveguide, an S-bend waveguide, a Y-splitter, and a directional coupler, were experimentally demonstrated using scanning near-field terahertz microscopy. The proposed waveguide indeed enables propagation, bending, splitting, and coupling of terahertz SPPs and thus paves a new way for the development of flexible and compact plasmonic circuits operating at terahertz frequencies. (C) 2017 Chinese Laser Press
UR - http://hdl.handle.net/10754/626894
UR - https://www.osapublishing.org/prj/abstract.cfm?uri=prj-6-1-18
UR - http://www.scopus.com/inward/record.url?scp=85039060513&partnerID=8YFLogxK
U2 - 10.1364/PRJ.6.000018
DO - 10.1364/PRJ.6.000018
M3 - Article
SN - 2327-9125
VL - 6
SP - 18
JO - Photonics Research
JF - Photonics Research
IS - 1
ER -