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| Content Provider | IET Digital Library |
|---|---|
| Author | Dapeng, Zhou Binggang, Xiao Lihua, Xiao Fenglei, Guo Xiumin, Wang |
| Abstract | An efficient modulation can be obtained by graphene due to its outstanding light-matter interaction, and many kinds of modulators based on graphene have been studied during the last couple of years. However, there still exist unsolved issues in graphene-based modulators, such as how to make a balance between modulation depth and modulation bandwidth. This work proposes a reflective modulator with relatively high-modulation depth and wide working bandwidth. The proposed modulator has a simple five-layered structure of graphene–silica–graphene–silicon-metal. They use an effective method of finite element method to simulate the performance of this modulator, and obtain a modulation depth of 96% with a low bias voltage of ∼4 V. Furthermore, they calculate the modulation speed by the equivalent circuit method, and obtain the maximum modulation speed of about 25 kHz and a wide broadband of 72 kHz from theoretical analysis. Therefore, this high-performance modulator provides an effective method for terahertz communication devices. |
| Starting Page | 515 |
| Ending Page | 519 |
| Page Count | 5 |
| Volume Number | 14 |
| e-ISSN | 17500443 |
| Issue Number | Issue 5, May (2019) |
| Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/mnl/14/5 |
| Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/10.1049/mnl.2018.5511 |
| Journal | Micro & Nano Letters |
| Publisher Date | 2019-05-01 |
| Access Restriction | Open |
| Rights Holder | © The Institution of Engineering and Technology |
| Subject Keyword | C-SiO2-C-Si Double-layer Graphene Effective Method Efficient Modulation Elemental Semiconductor Equivalent Circuit Equivalent Circuit Method Finite Element Analysis Five-layered Structure Graphene Graphene-based Modulators Graphene-silica-graphene-silicon-metal High-modulation Depth Modulator High-performance Modulator Light-matter Interaction Low Bias Voltage Maximum Modulation Speed Modulation Bandwidth Optical Beam Modulators Optical Modulation Other Optical System Component Reflective Modulator Silicon Silicon Compound Wide Working Bandwidth |
| Content Type | Text |
| Resource Type | Article |
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