Hot electrons modulation of third harmonic generation in graphene


Type
Article
Change log
Authors
Soavi, G 
Wang, G 
Rostami, H 
Tomadin, A 
Baici, O 
Abstract

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 increase of absorbed optical power or Joule heating.

Description
Keywords
cond-mat.mes-hall, cond-mat.mes-hall, cond-mat.mtrl-sci
Journal Title
2019 Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference, CLEO/Europe-EQEC 2019
Conference Name
Journal ISSN
2330-4022
Volume Title
6
Publisher
IEEE
Sponsorship
Royal Society (TG102524)
Engineering and Physical Sciences Research Council (EP/K01711X/1)
Engineering and Physical Sciences Research Council (EP/K017144/1)
Engineering and Physical Sciences Research Council (EP/L016087/1)
European Commission Horizon 2020 (H2020) Future and Emerging Technologies (FET) (696656)
EPSRC (via University of Manchester) (R119256)
Engineering and Physical Sciences Research Council (EP/G042357/1)
The Royal Society (uf072943)
The Royal Society (wm090070)
Isaac Newton Trust (1135(N))
Royal Society (516002K5698/kk)
The Royal Society (fi061247)
European Commission (246026)
European Research Council (319277)