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Volume 25 - ICOP & ICPET 2019
ICOP & ICPET _ INPC _ ICOFS 2019, 25 - ICOP & ICPET 2019: 161-164 |
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Jafari B, Soofi H, Vahed H, Shoghi A A. Graphene based multiband THz electro-optic modulator. ICOP & ICPET _ INPC _ ICOFS 2019; 25 :161-164
URL: http://opsi.ir/article-1-1717-en.html
URL: http://opsi.ir/article-1-1717-en.html
1- School of Engineering- Emerging Technologies, University of Tabriz, Tabriz 5166616471, Iran
Abstract: (2145 Views)
In this article a multiband electro-optic modulator based on single layer graphene is designed and numerically investigated. The designed modulator incorporates metallic Nano-antennas to enhance the absorption and hence the modulator parameters. Due to integrating graphene into a metal-dielectric-graphene (MDG) sandwich structure, highly confined graphene plasmons (GPs) are excited in the MDG structure and multiple order Fabry-Perot (FP) resonances are formed by interference of oppositely propagating GPs waves that account for the multiband absorption enhancement. The applied bias voltage shifts the transmission spectra which in turn shifts the maximum transmission through the structure. At 31.7mm, the modulation depth is as high as 18dB. Unlike other graphene-based modulators that modulation is based on changes in graphene absorption, in this case modulation is based on frequency shifting of FP resonances.
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