Research Papers

Graphene-based hybrid plasmonic waveguide with ultra long-ranged propagation length

[+] Author Affiliations
Amin Monemian, Navid Barani, Mohsen Maddahali

Isfahan University of Technology, Electrical and Computer Engineering Department, Isfahan 84156-83111, Iran

J. Nanophoton. 10(2), 026008 (Apr 21, 2016). doi:10.1117/1.JNP.10.026008
History: Received January 31, 2016; Accepted March 28, 2016
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Abstract.  We have investigated on a tunable graphene-based hybrid plasmonic terahertz waveguide with ultra-long-ranged propagation length at the frequency of 3 THz by using a finite-element method. The proposed structure consists of five graphene sheets, a curved semiconductor layer as a low-index material at the top of an air gap spacer, and gallium arsenide as a high-index material. The most important characteristic of this hybrid structure is its tunable, long-ranged propagation length. By tuning the waveguide dimensions, we can have a very long propagation length ranging from 20 to 15,000  μm, which is approximately 10 times higher than that in recently proposed structures. Moreover, we will show that with this increase in the propagation length, the normalized mode area does not change significantly and remains between 0.03% and 0.04%, indicating that this structure also poses a tight energy confinement.

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© 2016 Society of Photo-Optical Instrumentation Engineers

Citation

Amin Monemian ; Navid Barani and Mohsen Maddahali
"Graphene-based hybrid plasmonic waveguide with ultra long-ranged propagation length", J. Nanophoton. 10(2), 026008 (Apr 21, 2016). ; http://dx.doi.org/10.1117/1.JNP.10.026008


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