Da Teng, Kai Wang, Zhe Li, Qing Cao, Yanan Tang, Yongzhe Zhao, Ziyi Liu, Yunwen Zhang, Rongzhen Guo. Graphene Gap Plasmonic Waveguide for Deep-Subwavelength Transmission of Mid-Infrared Waves[J]. Acta Optica Sinica, 2020, 40(6): 0623002
- Acta Optica Sinica
- Vol. 40, Issue 6, 0623002 (2020)
Fig. 1. Schematic of waveguide structure
Fig. 2. Normalized energy distribution of fundamental mode. (a) Normalized energy distribution; (b) |Sz| along y direction
Fig. 3. Graphene plasmon modal properties with respect to frequency. (a) Re(neff) and LP; (b) Aeff/A0 and FM. Here, we set μc=0.5 eV, T=300 K, τ=0.5 ps, R=30 nm, ε1=3, ε2=1, W= 200 nm, H=100 nm, and D=20 nm
Fig. 4. Modal transmission properties with respect to R and D. (a) Re(neff) and LP versus R when D=20 nm; (b) Aeff/A0 and FM versus R when D=20 nm; (c) Re(neff) and LP versus D when R= 30 nm; (d) Aeff/A0 and FM versus D when R= 30 nm
Fig. 5. Modal transmission properties with respect to nanowire permittivity and chemical potential of graphene. (a) Re(neff) and LP as functions of ε1 when μc=0.5 eV; (b) Aeff/A0 and FM as functions of ε1 when μc=0.5 eV; (c) Re(neff) and LP as functions of μc when ε1=2; (d)
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Table 1. Impact of permittivity of rectangular dielectric on graphene plasmon mode
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