NDLI: A Graphene-Based Bandwidth-Tunable Mid-Infrared Ultra-Broadband Plasmonic Filter

Content Provider	Springer Nature Link
Author	Li, Hong Ju Zhai, Xiang Sun, Bin Huang, Zhen Rong Wang, Ling Ling
Copyright Year	2014
Abstract	The closely spaced pair of parallel graphene sheets separated by uniform dielectric gratings is proposed and investigated numerically via the finite-difference time-domain (FDTD) method. This simple structure working as plasmonic Bragg reflectors can produce an original ultra-broadband band-stop filtering effect in the mid-infrared region. The transmission spectrum is tuned dynamically not only via varying the period of the grating but also by a small change in the chemical potential of graphene without re-fabricating new structures. In addition, the bandwidth of the stopband can also be engineered by changing the refractive index of the sandwiched dielectric grating. Simulation results are confirmed by theoretical calculations. As an application, a defect is introduced into the uniform dielectric grating, and the obvious Fabry-Perot-like resonant mode hence forms in the stopband. The proposed device without doubt can be used as highly tunable ultra-broadband band-stop filters and mid-infrared optical modulators. Our studies will play a significant role in the fabrication of ultra-compact versatile integrated circuits.
Starting Page	765
Ending Page	771
Page Count	7
File Format	PDF
ISSN	15571955
Journal	Plasmonics
Volume Number	10
Issue Number	4
e-ISSN	15571963
Language	English
Publisher	Springer US
Publisher Date	2014-12-16
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Graphene plasmon Bragg reflector Ultra-broadband stopband Mid-infrared Biotechnology Nanotechnology Biophysics and Biological Physics Biochemistry
Content Type	Text
Resource Type	Article
Subject	Nanoscience and Nanotechnology Biochemistry Biophysics Biotechnology

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