Tao Chen, Liangling Wang, Lijuan Chen, Jing Wang, Haikun Zhang, Wei Xia. Tunable terahertz wave difference frequency generation in a graphene/AlGaAs surface plasmon waveguide[J]. Photonics Research, 2018, 6(3): 186
- Photonics Research
- Vol. 6, Issue 3, 186 (2018)
Fig. 1. Schematic of the graphene/AlGaAs surface plasmon waveguide.
Fig. 2. (a) Real and (b) imaginary refractive index of graphene versus the Fermi energy level for 2, 4, 6, and 8 THz, respectively.
Fig. 3. Electric field profiles of (a) TM single mode at 6 THz, (b) TE fundamental mode at pump wavelength λ p = 1.53 μm λ s = 1.5783 μm A eff
Fig. 4. (a) Phase mismatch Δ k
Fig. 5. (a) Contour image of power-normalized conversion efficiency versus waveguide length for different THz wave frequencies. (b) THz wave power versus THz frequency for waveguide length 500 μm and 2500 μm with P p = 100 W P s = 1 W
Fig. 6. Optical pulse evolutions along the waveguide with 30 ps pulse input pump with peak power 100 W and 1 W CW input signal: (a) pump wave power, (b) signal wave power, and (c) THz wave power.
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Table 1. Effective Refractive Index and Fermi Energy Level E F
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