Graphene-Based Hybrid Plasmonic Waveguide with Deep Subwavelength Confinement

Fig. 2. 2D energy density distributions of fundamental hybrid plasmonic mode and 1D energy density distributions along vertical and horizontal directions of gap center for different $h_{w}$ . 2D energy density distributions of fundamental hybrid plasmonic mode for (a) $h_{w} = 0$ (without wedge), (b) $h_{w} = 2 μ m$ , (c) $h_{w} = 4 μ m$ , (d) $h_{w} = 4.5 μ m$ , and (e) $h_{w} = 4.9 μ m$ ; 1D energy density distributions along (f) vertical and (g) horizontal directions of gap center

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Fig. 3. 2D energy density distributions of fundamental hybrid plasmonic mode and 1D energy density distributions along vertical and horizontal directions of gap center for different $θ$ . 2D energy density distributions of fundamental hybrid plasmonic mode for (a) $θ = 30^{\circ}$ , (b) $θ = 60^{\circ}$ , (c) $θ = 90^{\circ}$ , and (d) $θ = 120^{\circ}$ ; 1D energy density distributions along (e) vertical and (f) horizontal directions of gap center

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Fig. 4. Dependences of $n_{e f f}$ , $A_{e f f} / A_{0}$ , $L_{p}$ , and $F o M$ of fundamental hybrid plasmonic mode on height of GaAs ridge $h$ at different $h_{w}$ .(a) $n_{e f f}$ ; (b) $A_{e f f} / A_{0}$ ; (c) $L_{p}$ ; (d) $F o M$

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Fig. 5. Dependences of $n_{e f f}$ , $A_{e f f} / A_{0}$ , $L_{p}$ and $F o M$ of fundamental hybrid plasmonic mode on angle $θ$ at different $h_{w}$ . (a) $n_{e f f}$ ; (b) $A_{e f f} / A_{0}$ ;(c) $L_{p}$ ; (d) $F o M$

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Fig. 6. Dependences of $n_{e f f}$ , $A_{e f f} / A_{0}$ , $L_{p}$ , and $F o M$ of fundamental hybrid plasmonic mode on chemical potential of graphene $μ_{c}$ at different $h_{w}$ . (a) $n_{e f f}$ ; (b) $A_{e f f} / A_{0}$ ; (c) $L_{p}$ ; (d) $F o M$

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Fig. 7. Cross section of two graphene-V type groove hybrid plasmon waveguides placed side by side with separation $S$ =28 μm, and electromagnetic field component $E_{y}$ of even symmetric mode and odd symmetric mode for $S = 28 μ m$ . (a) Cross section of two graphene-V type groove hybrid plasmon waveguides placed side by side with separation $S$ =28 μm; electromagnetic field component $E_{y}$ of (b) even symmetric mode and (c) odd symmetric mode when $S = 28 μ m$ for waveguide shown in Fig. 7(a)

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Fig. 8. Dependence of $L_{c} / L_{p}$ on S at different $θ$ and dependence of $L_{c} / L_{p}$ on S at different $μ_{c}$ . (a) Dependence of $L_{c} / L_{p}$ on S at different $θ$ ; (b) dependence of $L_{c} / L_{p}$ on S at different $μ_{c}$

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Xueqing He, Yuanbo Zhai, Pengfei Li. Graphene-Based Hybrid Plasmonic Waveguide with Deep Subwavelength Confinement[J]. Acta Optica Sinica, 2023, 43(10): 1013001

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Paper Information

Category: Integrated Optics

Received: Nov. 2, 2022

Accepted: Jan. 9, 2023

Published Online: May. 9, 2023

The Author Email: Li Pengfei (lipf@tynu.edu.cn)

DOI:10.3788/AOS221917

Topics

laser devices and laser physics

Lasers and Laser Optics

Laser physics

laser manufacturing

Instrumentation, Measurement and Metrology