Tunable terahertz wave difference frequency generation in a graphene/AlGaAs surface plasmon waveguide

Tao Chen; Liangling Wang; Lijuan Chen; Jing Wang; Haikun Zhang; Wei Xia

doi:doi:10.1364/PRJ.6.000186

Photonics Research, 2018, 6 (3): 03000186, Published Online: Jul. 10, 2018

Tunable terahertz wave difference frequency generation in a graphene/AlGaAs surface plasmon waveguide Download： 968次

Tao Chen ^1,*Liangling Wang ¹Lijuan Chen ¹Jing Wang ¹Haikun Zhang ¹Wei Xia ^1,2

Author Affiliations

¹ School of Physics and Technology, University of Jinan, Jinan 250022, China

² e-mail: sps_xiaw@ujn.edu.cn

Figures & Tables

Fig. 1. Schematic of the graphene/AlGaAs surface plasmon waveguide.

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Fig. 2. (a) Real and (b) imaginary refractive index of graphene versus the Fermi energy level for 2, 4, 6, and 8 THz, respectively.

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Fig. 3. Electric field profiles of (a) TM single mode at 6 THz, (b) TE fundamental mode at pump wavelength λp=1.53 μm, and (c) TM fundamental mode at signal wavelength λs=1.5783 μm. (d) Effective interaction area Aeff as a function of THz wave frequency.

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Fig. 4. (a) Phase mismatch Δk as a function of Fermi energy level for 5.8, 5.9, 6.0, and 6.1 THz generation. (b) Phase-matching THz frequency as a function of Fermi energy level.

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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 Pp=100 W and Ps=1 W.

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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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Table1. Effective Refractive Index and Fermi Energy Level EF for Phase-Matching THz Frequency

Wave Frequency/THz	4	4.5	5	5.5	6	6.5	7
$E_{F}$ /eV	0.848	1.072	1.340	1.606	1.885	2.167	2.456
Effective index	12.171-0.658i	11.223-0.399i	10.477-0.270i	9.890-0.151i	9.357-0.144i	8.927-0.109i	8.552-0.086i

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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): 03000186.

Tunable terahertz wave difference frequency generation in a graphene/AlGaAs surface plasmon waveguide Download： 968次

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 λp=1.53 μm, and (c) TM fundamental mode at signal wavelength λs=1.5783 μm. (d) Effective interaction area Aeff as a function of THz wave frequency.

Fig. 4. (a) Phase mismatch Δk as a function of Fermi energy level for 5.8, 5.9, 6.0, and 6.1 THz generation. (b) Phase-matching THz frequency as a function of Fermi energy level.

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 Pp=100 W and Ps=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.

Table1. Effective Refractive Index and Fermi Energy Level EF for Phase-Matching THz Frequency

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Tunable terahertz wave difference frequency generation in a graphene/AlGaAs surface plasmon waveguide Download： 968次

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 λp=1.53 μm, and (c) TM fundamental mode at signal wavelength λs=1.5783 μm. (d) Effective interaction area Aeff as a function of THz wave frequency.

Fig. 4. (a) Phase mismatch Δk as a function of Fermi energy level for 5.8, 5.9, 6.0, and 6.1 THz generation. (b) Phase-matching THz frequency as a function of Fermi energy level.

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 Pp=100 W and Ps=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.

Table1. Effective Refractive Index and Fermi Energy Level EF for Phase-Matching THz Frequency

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