Electrically controllable directional coupler based on tunable hybrid graphene nanoplasmonic waveguide

Du, Wei; Li, Kai; Wu, Di; Jiao, Kunpeng; Jiao, Lipeng; Liu, Huan; Xia, Feng; Kong, Weijin; Dong, Lifeng; Yun, Maojin

doi:10.1016/j.optcom.2018.08.068

Cited by 16 publications

(5 citation statements)

References 35 publications

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“…Metal oxide semiconductor-based hybrid plasmonic waveguides are used to design compact, broadband silicon-based optical modulators. These waveguides use doped silicon, Indium Tin Oxide (ITO), vanadium dioxide, or graphene (Kim and Kim, 2016, Du et al, 2019, Babicheva et al, 2013, Liu et al, 2011a, Wong and Helmy, 2017. A fundamental characteristic of these materials is adjusting the density of carriers and injecting charge into the material by applying an electric eld (Lin and Helmy, 2015b, Koch et al, 2016, Shah et al, 2018, Jin et al, 2016, Wood et al, 2018.…”

Section: Introductionmentioning

confidence: 99%

“…A fundamental characteristic of these materials is adjusting the density of carriers and injecting charge into the material by applying an electric eld (Lin and Helmy, 2015b, Koch et al, 2016, Shah et al, 2018, Jin et al, 2016, Wood et al, 2018. Recently, directional coupler-based devices have been investigated (Kim, 2014, Kim and Kim, 2016, Du et al, 2019. In these structures, the coupling rate and attenuation coe cient change, and the input signal can be modulated by changing the density of plasmonic material carriers in the coupler.…”

Section: Introductionmentioning

confidence: 99%

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Design of High Performance Hybrid Plasmonic Modulator Based on ITO and Graphene

Abbaszadeh-Azar

Abedi

2022

Preprint

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In this paper, a hybrid plasmonic modulator based on ITO and graphene is designed. Graphene and ITO are used in the active region, which increases the light-matter interaction and reduces the device's operating voltage in the proposed modulator. As a result, it increases the extinction ratio (ER) and reduces the proposed modulator's power consumption and device footprint compared to similar modulators. The values of 8.12 dB/µm and 5.4 fJ are obtained for ER and power consumption, respectively. The time-domain finite-difference (FDTD) method is used to simulate the modulator. Integrating a modulator with high light-matter interaction and low power consumption in the silicon-on-insulator platform has significant potential for broadband, compact and efficient communication interconnects and circuits.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Design of High Performance Hybrid Plasmonic Modulator Based on ITO and Graphene

Abbaszadeh-Azar

Abedi

2022

Preprint

View full text Add to dashboard Cite

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“…Metal oxide semiconductor-based hybrid plasmonic waveguides are used to design compact, broadband silicon-based optical modulators. These waveguides use doped silicon, Indium Tin Oxide (ITO), vanadium dioxide, or graphene [7][8][9][10][11]. A fundamental characteristic of these materials is adjusting the density of carriers and injecting charge into the material by applying an electric field [12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

“…A fundamental characteristic of these materials is adjusting the density of carriers and injecting charge into the material by applying an electric field [12][13][14][15][16]. Recently, directional coupler-based devices have been investigated [8,9,17]. In these structures, by changing the density of plasmonic material carriers in the coupler, the coupling rate and attenuation coefficient change, and the input signal can be modulated.…”

Section: Introductionmentioning

confidence: 99%

Design of a Low Power Hybrid Electro-Optic Plasmonic Modulator Based on ITO and Graphene

Abbaszadeh-Azar

Abedi

2021

Preprint

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In this paper, a hybrid plasmonic modulator based on ITO and graphene has been proposed and designed. Graphene and ITO are used in the active region, which increases the light-matter interaction and reduces the device's operating voltage in the proposed modulator. As a result, it increases the extinction ratio (ER), reduces power consumption and device footprint in the proposed modulator compared to similar modulators. The values of 14 dB/µm and 5.4 fJ are obtained for ER and power consumption, respectively. The time-domain finite-difference (FDTD) method is used to simulate the modulator. The integration of a modulator with high light-matter interaction and low power consumption in the silicon-on-insulator platform has significant potential for broadband, compact and efficient communication interconnects and circuits.

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“…To some extent, graphene is more suitable for integration in optical devices because of its planar structure. So far, many efforts have been made to develop graphene plasmonic devices, including modulators [26,27], couplers [28,29], switch [30], and waveguides [31,32,33,34,35]. As the key component in PICs, lots of promising graphene-based waveguides have been intensively studied in the past few years [36,37,38,39,40,41,42].…”

Section: Introductionmentioning

confidence: 99%

High-Performance Transmission of Surface Plasmons in Graphene-Covered Nanowire Pairs with Substrate

et al. 2019

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Graphene was recently proposed as a promising alternative to support surface plasmons with superior performances in the mid-infrared range. Here, we theoretically show that high-performance and low-loss transmission of graphene plasmons can be achieved by adding a silica substrate to the graphene-covered nanowire pairs. The effect of the substrate layer on mode properties has been intensively investigated by using the finite element method. Furthermore, the results show that inserting a low index material layer between the nanowire and substrate could compensate for the loss accompanied by the substrate, thus the mode properties could be adjusted to fulfill better performance. A reasonable propagation length of 15 μm and an ultra-small normalized mode area about ~10−4 could be obtained at 30 THz. The introduction of the substrate layer is crucial for practical fabrication, which provides additional freedom to tune the mode properties. The graphene-covered nanowire pairs with an extra substrate may inspire potential applications in tunable integrated nanophotonic devices.

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Electrically controllable directional coupler based on tunable hybrid graphene nanoplasmonic waveguide

Cited by 16 publications

References 35 publications

Design of High Performance Hybrid Plasmonic Modulator Based on ITO and Graphene

Design of High Performance Hybrid Plasmonic Modulator Based on ITO and Graphene

Design of a Low Power Hybrid Electro-Optic Plasmonic Modulator Based on ITO and Graphene

High-Performance Transmission of Surface Plasmons in Graphene-Covered Nanowire Pairs with Substrate

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