| Autor: |
Linlong Tang, Jinglei Du, Haofei Shi, Dongshan Wei, Chunlei Du |
| Jazyk: |
angličtina |
| Rok vydání: |
2014 |
| Předmět: |
|
| Zdroj: |
AIP Advances, Vol 4, Iss 10, Pp 107138-107138-7 (2014) |
| Druh dokumentu: |
article |
| ISSN: |
2158-3226 |
| DOI: |
10.1063/1.4900487 |
| Popis: |
We exploit inter-layer radiative transitions to provide gains to amplify terahertz waves in graphene heterostructures. This is achieved by properly doping graphene sheets and aligning their energy bands so that the processes of stimulated emissions can overwhelm absorptions. We derive an expression for the gain estimation and show the gain is insensitive to temperature variation. Moreover, the gain is broadband and can be strong enough to compensate the free carrier loss, indicating graphene based room temperature terahertz lasers are feasible. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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