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Ultrafast All-Optical Graphene Modulator
- Source :
- Nano Letters. 14:955-959
- Publication Year :
- 2014
- Publisher :
- American Chemical Society (ACS), 2014.
-
Abstract
- Graphene is an optical material of unusual characteristics because of its linearly dispersive conduction and valence bands and the strong interband transitions. It allows broadband light-matter interactions with ultrafast responses and can be readily pasted to surfaces of functional structures for photonic and optoelectronic applications. Recently, graphene-based optical modulators have been demonstrated with electrical tuning of the Fermi level of graphene. Their operation bandwidth, however, was limited to about 1 GHz by the response of the driving electrical circuit. Clearly, this can be improved by an all-optical approach. Here, we show that a graphene-clad microfiber all-optical modulator can achieve a modulation depth of 38% and a response time of ∼ 2.2 ps, limited only by the intrinsic carrier relaxation time of graphene. This modulator is compatible with current high-speed fiber-optic communication networks and may open the door to meet future demand of ultrafast optical signal processing.
- Subjects :
- Materials science
business.industry
Graphene
Mechanical Engineering
Fermi level
Physics::Optics
Response time
Bioengineering
General Chemistry
Condensed Matter Physics
law.invention
Amplitude modulation
symbols.namesake
Optical modulator
law
Physics::Atomic and Molecular Clusters
symbols
Optoelectronics
General Materials Science
Photonics
business
Electrical tuning
Ultrashort pulse
Subjects
Details
- ISSN :
- 15306992 and 15306984
- Volume :
- 14
- Database :
- OpenAIRE
- Journal :
- Nano Letters
- Accession number :
- edsair.doi.dedup.....b477a580025da58c24551a73a37b8724