Creation of graphene terahertz lasers View Homepage


Ontology type: schema:MonetaryGrant     


Grant Info

YEARS

2011-2015

FUNDING AMOUNT

462020000 JPY

ABSTRACT

We challenged the creation of graphene-based terahertz (THz) lasers. First, we succeeded in observing the stimulated emission of THz radiation at 300K in the transient response of optically pumped graphene, manifesting the proof of the laser operation principle that we had theoretically discovered. Second, we theoretically discovered a giant THz gain enhancement effect of the surface plasmon polaritons in pumped graphene and experimentally verified it by using our original optical-pump and near-field THz-probe spectroscopy. Third, we designed and fabricated the current injection-type graphene THz laser by using our originally developed graphene-synthesis and process technology, succeeding in single-mode lasing at 5.2 THz at 100K for the first time. Fourth, we built the design theory for graphene THz lasers. Furthermore, we proposed a novel device structure and revealed their extremely high THz gain properties. On the basis of these results obtained the feasibility of THz lasing at room temperature from graphene-based devices was quantitatively manifested. More... »

URL

https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-23000008

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