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Hot electrons modulation of third harmonic generation in graphene
KTH, Centres, Nordic Institute for Theoretical Physics NORDITA.
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2019 (English)In: 2019 Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference, CLEO/Europe-EQEC 2019, Institute of Electrical and Electronics Engineers Inc. , 2019Conference paper, Published paper (Refereed)
Abstract [en]

Hot-electrons dominate the ultrafast (∼fs-ps) optical and electronic properties of metals and semiconductors [1-2] and they are exploited in a variety of applications including photovoltaics and photodetection. Here we perform power-dependent third harmonic generation (THG) measurements on gated single layer graphene (SLG) and we show that hot-electrons modulate significantly the power-law dependence of THG, inducing a large deviation from the expected cubic power-law. We use a Chemical Vapor Deposition (CVD) SLG sample transferred on Fused Silica (FS) and gated by ionic liquid (IL), Fig.1(a). We excite the sample with the idler beam of an Optical Parametric Oscillator (OPO, Coherent) at a photon energy of hω0=0.69eV. The OPO is seeded by a mode-locked Ti:Sa laser (Coherent) with 150fs pulse duration and 80MHz repetition rate. The OPO idler spot-size is∼4.7μm and the pulse duration ∼300fs.

Place, publisher, year, edition, pages
Institute of Electrical and Electronics Engineers Inc. , 2019.
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-268561DOI: 10.1109/CLEOE-EQEC.2019.8871860Scopus ID: 2-s2.0-85074336556ISBN: 9781728104690 (print)OAI: oai:DiVA.org:kth-268561DiVA, id: diva2:1420531
Conference
2019 Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference, CLEO/Europe-EQEC 2019, 23 June 2019 through 27 June 2019
Note

QC 20200331

Available from: 2020-03-31 Created: 2020-03-31 Last updated: 2020-03-31Bibliographically approved

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CiteExportLink to record
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