Hot Electrons Modulation of Third-Harmonic Generation in Graphene

被引：34

作者：

Soavi, Giancarlo ^{[1
,2
]}

Wang, Gang ^{[1
]}

Rostami, Habib ^{[3
]}

Tomadin, Andrea ^{[4
]}

Balci, Osman ^{[1
]}

Paradisanos, I. ^{[1
]}

Pogna, Eva A. A. ^{[5
]}

Cerullo, Giulio ^{[5
]}

Lidorikis, Elefterios ^{[6
]}

Polini, Marco ^{[4
]}

Ferrari, Andrea C. ^{[1
]}

机构：

[1] Univ Cambridge, Cambridge Graphene Ctr, Cambridge CB3 0FA, England

[2] Friedrich Schiller Univ, Inst Festkorperphys, Max Wien Pl 1, D-07743 Jena, Germany

[3] Nord Inst Theoret Phys, Roslagstullsbacken 23, SE-10691 Stockholm, Sweden

[4] Ist Italiano Tecnol, Graphene Labs, Via Morego 30, I-16163 Genoa, Italy

[5] Politecn Milan, Dipartimento Fis, CNR, IFN, Pzza L da Vinci 32, I-20133 Milan, Italy

[6] Univ Ioannina, Dept Mat Sci & Engn, GR-45110 Ioannina, Greece

来源：

ACS PHOTONICS | 2019年 / 6卷 / 11期

基金：

英国工程与自然科学研究理事会; 瑞典研究理事会;

关键词：

graphene; hot electrons; third-harmonic generation; photonics; optoelectronics; nonlinear optics; ultrafast optics; 3RD HARMONIC-GENERATION; 2ND-HARMONIC GENERATION; FEMTOSECOND; GOLD; DISTRIBUTIONS; SPECTROSCOPY; SCATTERING; EFFICIENCY; PHOTONICS; EMISSION;

D O I：

10.1021/acsphotonics.9b00928

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Hot electrons dominate the ultrafast (similar to 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.

引用

页码：2841 / 2849

页数：17

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