Ultrafast Sub-100 fs All-Optical Modulation and Efficient Third-Harmonic Generation in Weyl Semimetal Niobium Phosphide Thin Films

Tilmann, Benjamin1; Pandeya, Avanindra Kumar2; Grinblat, Gustavo3; Menezes, Leonardo de S.1,4; Li, Yi5; Shekhar, Chandra6; Felser, Claudia6; Parkin, Stuart S. P.2; Bedoya-Pinto, Amilcar2; Maier, Stefan A.1,7

2022-03-01

10.1002/adma.202106733

ADVANCED MATERIALS   影响因子和分区

0935-9648

1521-4095

Since their experimental discovery in 2015, Weyl semimetals have generated a large amount of attention due their intriguing physical properties that arise from their linear electron dispersion relation and topological surface states. In particular, in the field of nonlinear (NL) optics and light harvesting, Weyl semimetals have shown outstanding performances and achieved record NL conversion coefficients. In this context, the first steps toward Weyl semimetal nanophotonics are performed here by thoroughly characterizing the linear and NL optical behavior of epitaxially grown niobium phosphide (NbP) thin films, covering the visible to the near-infrared regime of the electromagnetic spectrum. Despite the measured high linear absorption, third-harmonic generation studies demonstrate high conversion efficiencies up to 10(-4)% that can be attributed to the topological electron states at the surface of the material. Furthermore, nondegenerate pump-probe measurements with sub-10 fs pulses reveal a maximum modulation depth of approximate to 1%, completely decaying within 100 fs and therefore suggesting the possibility of developing all-optical switching devices based on NbP. Altogether, this work reveals the promising NL optical properties of Weyl semimetal thin films, which outperform bulk crystals of the same material, laying the grounds for nanoscale applications, enabled by top-down nanostructuring, such as light-harvesting, on-chip frequency conversion, and all-optical processing.

nonlinear optics pump-probe spectroscopy thin films ultrafast optics Weyl semimetals

SCI ; EI

英语

NI论文

其他

Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) under Germany's Excellence Strategy[EXC 2089/1-390776260] ; EPSRC Reactive Plasmonics Programme[EP/M013812/1] ; PICT[2019-01886] ; Natural Science Foundation of Guandong Province[2019A1515111136] ; European Union's Framework Programme for Research and Innovation Horizon 2020 (2014-2020) under the Marie Skodowska-Curie Grant[754388] ; European Research Council (ERC)[742068]

Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics

Chemistry, Multidisciplinary ; Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter

WOS:000763598000001

WILEY-V C H VERLAG GMBH

20221011742621

Harmonic generation ; Infrared devices ; Light ; Light modulation ; Niobium compounds ; Optical frequency conversion ; Optical properties ; Optical pumping ; Optical signal processing ; Optical switches ; Probes ; Topology

Light/Optics:741.1 ; Nonlinear Optics:741.1.1 ; Optical Devices and Systems:741.3 ; Combinatorial Mathematics, Includes Graph Theory, Set Theory:921.4

MATERIALS SCIENCE

Web of Science

1.Ludwig Maximilians Univ Munchen, Fak Phys, Nanoinst Munchen, Chair Hybrid Nanosyst, D-80539 Munich, Germany
2.Max Planck Inst Microstruct Phys, D-06120 Halle, Saale, Germany
3.Univ Buenos Aires, IFIBA CONICET, Dept Fis, FCEN, C1428EGA, Buenos Aires, DF, Argentina
4.Univ Fed Pernambuco, Dept Fis, BR-50670901 Recife, PE, Brazil
5.Southern Univ Sci & Technol, MOE Engn Res Ctr Integrated Circuits Next Generat, Sch Microelect, Shenzhen 518055, Peoples R China
6.Max Planck Inst Chem Phys Solids, D-01187 Dresden, Germany
7.Imperial Coll London, Dept Phys, Blackett Lab, London SW7 2AZ, England

Tilmann, Benjamin,Pandeya, Avanindra Kumar,Grinblat, Gustavo,et al. Ultrafast Sub-100 fs All-Optical Modulation and Efficient Third-Harmonic Generation in Weyl Semimetal Niobium Phosphide Thin Films[J]. ADVANCED MATERIALS,2022,34.

Tilmann, Benjamin.,Pandeya, Avanindra Kumar.,Grinblat, Gustavo.,Menezes, Leonardo de S..,Li, Yi.,...&Maier, Stefan A..(2022).Ultrafast Sub-100 fs All-Optical Modulation and Efficient Third-Harmonic Generation in Weyl Semimetal Niobium Phosphide Thin Films.ADVANCED MATERIALS,34.

Tilmann, Benjamin,et al."Ultrafast Sub-100 fs All-Optical Modulation and Efficient Third-Harmonic Generation in Weyl Semimetal Niobium Phosphide Thin Films".ADVANCED MATERIALS 34(2022).