Terahertz Generation and Amplification in Graphene Nanoribbons in Multi-frequency Electric Fields
arXiv:1202.3477 · doi:10.1016/j.physe.2014.03.006
Abstract
We study theoretically a multi-frequency response of electrons in confined graphene subject to dc-ac driven fields. We explore the possibility for using graphene nanoribbons (GNRs) to generate and amplify terahertz (THz) radiations in electric field domainless regime. We discover two main important schemes of generation; when the frequencies are commensurate, THz generation is due to wave mixing and when they are non-commensurate, a single strong field suppresses space charge instability and any weak signals can get amplified. The use of graphene as a best substitute for semiconductor nanoelectronic devices is suggested.
9 pages, 6 figures
References in corpus (5)
- Theory of optical transitions in graphene nanoribbons
- Bloch gain in dc-ac-driven semiconductor superlattices in the absence of electric domains
- Berry's Phase for Standing Wave Near Graphene Edge
- Enhanced Optical Dichroism of Graphene Nanoribbons
- Electron Bloch Oscillations and Electromagnetic Transparency of Semiconductor Superlattices in Multi-Frequency Electric Fields