Imperial College London
Alternate

ProfessorStefanMaier

Faculty of Natural Sciences, Department of Physics

Lee-Lucas Chair in Experimental Physics
 
 
 
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Contact

 

+44 (0)20 7594 6063s.maier Website CV

 
 
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Location

 

Huxley 903Huxley BuildingSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Abdelwahab:2022:10.1038/s41566-022-01021-y,
author = {Abdelwahab, I and Tilmann, B and Wu, Y and Giovanni, D and Verzhbitskiy, I and Zhu, M and Berté, R and Xuan, F and Menezes, LDS and Eda, G and Sum, TC and Quek, SY and Maier, SA and Loh, KP},
doi = {10.1038/s41566-022-01021-y},
journal = {Nature Photonics},
pages = {644--650},
title = {Giant second-harmonic generation in ferroelectric NbOI2},
url = {http://dx.doi.org/10.1038/s41566-022-01021-y},
volume = {16},
year = {2022}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Implementing nonlinear optical components in nanoscale photonic devices is challenged by phase-matching conditions requiring thicknesses in the order of hundreds of wavelengths, and is disadvantaged by the short optical interaction depth of nanometre-scale materials and weak photon–photon interactions. Here we report that ferroelectric NbOI2 nanosheets exhibit giant second-harmonic generation with conversion efficiencies that are orders of magnitude higher than commonly reported nonlinear crystals. The nonlinear response scales with layer thickness and is strain- and electrical-tunable; a record >0.2% absolute SHG conversion efficiency and an effective nonlinear susceptibility χ(2)eff in the order of 10−9 m V−1 are demonstrated at an average pump intensity of 8 kW cm–2. Due to the interplay between anisotropic polarization and excitonic resonance in NbOI2, the spatial profile of the polarized SHG response can be tuned by the excitation wavelength. Our results represent a new paradigm for ultrathin, efficient nonlinear optical components.
AU  - Abdelwahab,I
AU  - Tilmann,B
AU  - Wu,Y
AU  - Giovanni,D
AU  - Verzhbitskiy,I
AU  - Zhu,M
AU  - Berté,R
AU  - Xuan,F
AU  - Menezes,LDS
AU  - Eda,G
AU  - Sum,TC
AU  - Quek,SY
AU  - Maier,SA
AU  - Loh,KP
DO  - 10.1038/s41566-022-01021-y
EP  - 650
PY  - 2022///
SN  - 1749-4885
SP  - 644
TI  - Giant second-harmonic generation in ferroelectric NbOI2
T2  - Nature Photonics
UR  - http://dx.doi.org/10.1038/s41566-022-01021-y
UR  - https://www.nature.com/articles/s41566-022-01021-y
UR  - http://hdl.handle.net/10044/1/98068
VL  - 16
ER  -
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