Identification and control of multiple leaky plasmon modes in silver nanowires

Leaky plasmon modes (LPMs) in metal nanowires (NWs), which combine the physical characteristic of both “plasmonics” and “leaky radiation”, present distinguished performances in terms of guiding and radiating light. In contrast to traditional light‐guiding in metal NWs with one single LPM, multiple L...

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Bibliographic Details
Published in:Laser & photonics reviews 2016-03, Vol.10 (2), p.278-286
Main Authors: Yang, Hangbo, Qiu, Min, Li, Qiang
Format: Article
Language:English
Subjects:
Channels
Confinement
Corners
Coupling
Data transmission
Detection
Excitation
far-field real-space imaging
Imaging
Integrated circuits
Leakage
leakage radiation microscopy
Leaky modes
leaky plasmon mode
metal nanowires
Microscopy
Nanowires
Paving
Photonics
Plasmonics
Plasmons
Polarization
Silver
surface plasmon polaritons
Wavelengths
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Summary:Leaky plasmon modes (LPMs) in metal nanowires (NWs), which combine the physical characteristic of both “plasmonics” and “leaky radiation”, present distinguished performances in terms of guiding and radiating light. In contrast to traditional light‐guiding in metal NWs with one single LPM, multiple LPMs are crucial for advanced uses such as augmenting data transmission channels, enhancing sensing performance, manipulating polarization and converting mode. Here, we demonstrate experimentally the control over multiple LPMs in pentagonal silver NWs. By combining far‐field real‐space imaging and leakage radiation microscopy, the three typical LPMs with fields mainly concentrating in corners surrounded by air are specifically identified. By manipulating excitation wavelengths and NW diameters, the number of the excited LPMs can be controlled. These findings reveal the physics of LPMs in silver NWs, thereby paving the way towards applying the high‐order leaky modes in silver NWs for photonic integrated circuits, nanoscale confinement, plasmonic sensing, QD‐nanowire coupling, etc. Leaky plasmon modes in metal nanowires combine the physical characteristic of both “plasmonics” and “leaky radiation”, therefore presenting distinguished performances in terms of guiding and radiating light. Multiple leaky plasmon modes are crucial for advanced uses such as augmenting data transmission channels, enhancing sensing performance, manipulating polarization and converting mode. Here, control over multiple Leaky plasmon modes in pentagonal silver nanowires is experimentally demonstrated by combining far‐field real‐space imaging and leakage radiation microscopy.
ISSN:1863-8880
1863-8899
DOI:10.1002/lpor.201500192