CUED Publications database

Hot Electrons Modulation of Third-Harmonic Generation in Graphene

Soavi, G and Wang, G and Rostami, H and Tomadin, A and Balci, O and Paradisanos, I and Pogna, EAA and Cerullo, G and Lidorikis, E and Polini, M and Ferrari, AC (2019) Hot Electrons Modulation of Third-Harmonic Generation in Graphene. ACS Photonics, 6. pp. 2841-2849.

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© 2019 American Chemical Society. Hot electrons dominate the ultrafast (∼fs-ps) optical and electronic properties of metals and semiconductors, and they are exploited in a variety of applications including photovoltaics and photodetection. We perform power-dependent third-harmonic generation measurements on gated single-layer graphene and detect a significant deviation from the cubic power law expected for a third-harmonic generation process. We assign this to the presence of hot electrons. Our results indicate that the performance of nonlinear photonics devices based on graphene, such as optical modulators and frequency converters, can be affected by changes in the electronic temperature, which might occur due to an increase in absorbed optical power or Joule heating.

Item Type: Article
Depositing User: Cron Job
Date Deposited: 04 Dec 2019 20:18
Last Modified: 24 Nov 2020 11:30
DOI: 10.1021/acsphotonics.9b00928