Journal
NANO LETTERS
Volume 12, Issue 3, Pages 1482-1485Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nl204202k
Keywords
Graphene; optical modulator; double layer; optoelectronics
Categories
Funding
- National Science Foundation Nano-scale Science and Engineering Center (NSF-NSEC) for Scalable and Integrated Nano Manufacturing (SINAM) [CMMI-0751621]
- Directorate For Engineering [0751621] Funding Source: National Science Foundation
- Div Of Civil, Mechanical, & Manufact Inn [0751621] Funding Source: National Science Foundation
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Here we report a high-performance double-layer graphene optical modulator. By using two graphene layers and an oxide layer in between to form a p-oxide-n like junction, this modulator operates at 1 GHz with a high modulation depth (similar to 0.16 dB/mu m) at a moderate drive voltage (similar to 5 V). Benefited from the symmetrical band structure of graphene near Dirac point, such design eliminates the optical loss widely existing in silicon photonics and has advantages including small footprint, low energy consumption, and low insertion loss.
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