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:2018:10.1021/acsnano.7b07698,
author = {Abdelwahab, I and Grinblat, G and Leng, K and Li, Y and Chi, X and Rusydi, A and Maier, SA and Loh, KP},
doi = {10.1021/acsnano.7b07698},
journal = {ACS Nano},
pages = {644--650},
title = {Highly Enhanced Third-Harmonic Generation in 2D Perovskites at Excitonic Resonances.},
url = {http://dx.doi.org/10.1021/acsnano.7b07698},
volume = {12},
year = {2018}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Two-dimensional hybrid organic-inorganic Ruddlesden-Popper perovskites (RPPs) have attracted considerable attention due to their rich photonic and optoelectronic properties. The natural multi-quantum-well structure of 2D RPPs has been predicted to exhibit a large third-order nonlinearity. However, nonlinear optical studies on 2D RPPs have previously been conducted only on bulk polycrystalline samples, in which only weak third-harmonic generation (THG) has been observed. Here, we perform parametric nonlinear optical characterization of 2D perovskite nanosheets mechanically exfoliated from four different lead halide RPP single crystals, from which we observe ultrastrong THG with a maximum effective third-order susceptibility (χ(3)) of 1.12 × 10-17 m2 V-2. A maximum conversion efficiency of 0.006% is attained, which is more than 5 orders of magnitude higher than previously reported values for 2D materials. The THG emission is resonantly enhanced at the excitonic band gap energy of the 2D RPP crystals and can be tuned from violet to red by selecting the RPP homologue with the requisite resonance. Due to signal depletion effects and phase-matching conditions, the strongest nonlinear response is achieved for thicknesses less than 100 nm.
AU  - Abdelwahab,I
AU  - Grinblat,G
AU  - Leng,K
AU  - Li,Y
AU  - Chi,X
AU  - Rusydi,A
AU  - Maier,SA
AU  - Loh,KP
DO  - 10.1021/acsnano.7b07698
EP  - 650
PY  - 2018///
SN  - 1936-0851
SP  - 644
TI  - Highly Enhanced Third-Harmonic Generation in 2D Perovskites at Excitonic Resonances.
T2  - ACS Nano
UR  - http://dx.doi.org/10.1021/acsnano.7b07698
UR  - http://hdl.handle.net/10044/1/56839
VL  - 12
ER  -
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