Imperial College London
Alternate

ProfessorRupertOulton

Faculty of Natural Sciences, Department of Physics

Professor of Nanophotonics
 
 
 
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Contact

 

+44 (0)20 7594 7576r.oulton

 
 
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Location

 

914Blackett LaboratorySouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Grinblat:2020:10.1126/sciadv.abb3123,
author = {Grinblat, G and Zhang, H and Nielsen, MP and Krivitsky, L and Berte, R and Li, Y and Tilmann, B and Cortes, E and Oulton, RF and Kuznetsov, A and Maier, SA},
doi = {10.1126/sciadv.abb3123},
journal = {Science Advances},
title = {Efficient ultrafast all-optical modulation in a nonlinear crystalline gallium phosphide nanodisk at the anapole excitation},
url = {http://dx.doi.org/10.1126/sciadv.abb3123},
volume = {6},
year = {2020}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - High–refractive index nanostructured dielectrics have the ability to locally enhance electromagnetic fields with low losses while presenting high third-order nonlinearities. In this work, we exploit these characteristics to achieve efficient ultrafast all-optical modulation in a crystalline gallium phosphide (GaP) nanoantenna through the optical Kerr effect (OKE) and two-photon absorption (TPA) in the visible/near-infrared range. We show that an individual GaP nanodisk can yield differential reflectivity modulations of up to ~40%, with characteristic modulation times between 14 and 66 fs, when probed at the anapole excitation (AE). Numerical simulations reveal that the AE represents a unique condition where both the OKE and TPA contribute with the same modulation sign, maximizing the response. These findings highly outperform previous reports on sub–100-fs all-optical switching from resonant nanoscale dielectrics, which have demonstrated modulation depths no larger than 0.5%, placing GaP nanoantennas as a promising choice for ultrafast all-optical modulation at the nanometer scale.
AU  - Grinblat,G
AU  - Zhang,H
AU  - Nielsen,MP
AU  - Krivitsky,L
AU  - Berte,R
AU  - Li,Y
AU  - Tilmann,B
AU  - Cortes,E
AU  - Oulton,RF
AU  - Kuznetsov,A
AU  - Maier,SA
DO  - 10.1126/sciadv.abb3123
PY  - 2020///
SN  - 2375-2548
TI  - Efficient ultrafast all-optical modulation in a nonlinear crystalline gallium phosphide nanodisk at the anapole excitation
T2  - Science Advances
UR  - http://dx.doi.org/10.1126/sciadv.abb3123
UR  - http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000561426700022&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
UR  - https://www.science.org/doi/10.1126/sciadv.abb3123
UR  - http://hdl.handle.net/10044/1/95320
VL  - 6
ER  -
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