Broadband Surface Plasmon Polariton Directional Coupling via Asymmetric Optical Slot Nanoantenna Pair

Surface plasmon polariton (SPP) coupling is a basic subject for plasmonic study and applications. Optical nanoantennas enable downscaling of the SPP coupling to subwavelength scales. In this study, asymmetric optical slot nanoantenna pairs composed of two optical slot nanoantennas with different len...

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Bibliographic Details
Published in:Nano letters Vol. 14; no. 2; pp. 704 - 709
Main Authors: Yang, Jing, Xiao, Xiao, Hu, Chuang, Zhang, Weiwei, Zhou, Shuxiang, Zhang, Jiasen
Format: Journal Article
Language:English
Published: Washington, DC American Chemical Society 12.02.2014
Subjects:
Applied sciences
Asymmetry
Broadband
Collective excitations (including excitons, polarons, plasmons and other charge-density excitations)
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Electronic structure and electrical properties of surfaces, interfaces, thin films and low-dimensional structures
Electronics
Exact sciences and technology
Joining
Launching
Molecular electronics, nanoelectronics
Nanostructure
Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation
Optical properties of low-dimensional, mesoscopic, and nanoscale materials and structures
Physics
Plasmonics
Plasmons
Polaritons
Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices
Surface and interface electron states
directional coupling
Surface plasmon polaritons
plasmonic display devices
broadband
optical slot nanoantennas
Display devices
Pair potentials
Plasmon polariton interaction
Optical properties
Bandwidth
Surface plasmons
AND circuit
Nanoelectronics
Nanoantenna
ISSN:1530-6984, 1530-6992, 1530-6992
Online Access:Get full text
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Description
Summary:Surface plasmon polariton (SPP) coupling is a basic subject for plasmonic study and applications. Optical nanoantennas enable downscaling of the SPP coupling to subwavelength scales. In this study, asymmetric optical slot nanoantenna pairs composed of two optical slot nanoantennas with different lengths are proposed for SPP directional coupling. Broadband unidirectional launching of SPPs is achieved, and the extinction ratio obtained experimentally reaches up to 44. The bandwidth is larger than 157 nm. Furthermore, SPP direction-selective radiation is demonstrated using the asymmetric optical slot nanoantenna pairs. A novel plasmonic display device showing the propagation direction of SPPs is achieved by employing asymmetric optical slot nanoantenna pairs without any electric device. Asymmetric optical slot nanoantenna pairs have large potential in the directional control of SPP launching and radiation and can be very useful in compact optical circuits and other photonic integrations.
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ISSN:1530-6984
1530-6992
1530-6992
DOI:10.1021/nl403954h