TY  - JOUR
PB  - SciPost Foundation
DO  - 10.21468/SciPostPhysCore.7.4.081
TI  - Tunable second harmonic generation in 2D materials: Comparison of different strategies
PY  - 2024/12/04
UR  - https://scipost.org/SciPostPhysCore.7.4.081
JF  - SciPost Physics Core
JA  - SciPost Phys. Core
VL  - 7
IS  - 4
SP  - 081
A1  - Grillo, Simone
AU  - Cannuccia, Elena
AU  - Palummo, Maurizia
AU  - Pulci, Olivia
AU  - Attaccalite, Claudio
AB  - Nonlinear optical frequency conversion, where optical fields interact with a nonlinear medium to generate new frequencies, is a key phenomenon in modern photonic systems. However, a major challenge with these techniques lies in the difficulty of tuning the nonlinear electrical susceptibilities that drive such effects in a given material. As a result, dynamic control of optical nonlinearities has remained largely confined to research laboratories, limiting its practical use as a spectroscopic tool. In this work, we aim to advance the development of devices with tunable nonlinear responses by exploring two potential mechanisms for electrically manipulating second-order optical nonlinearity in two-dimensional materials. Specifically, we consider two configurations: in the first, the material does not inherently exhibit second-harmonic generation (SHG), but this response is induced by an external field; in the second, an external field induces doping in a material that already exhibits SHG, altering the intensity of the nonlinear signal. In this work, we have studied these two configurations using a real-time ab-initio approach under an out-of-plane external field and including the effects of doping-induced variations in the screened electron-electron interaction. We then discuss the limitations of current computational methods and compare our results with experimental measurements.
ER  -

@Article{10.21468/SciPostPhysCore.7.4.081,
	title={{Tunable second harmonic generation in 2D materials: Comparison of different strategies}},
	author={Simone Grillo and Elena Cannuccia and Maurizia Palummo and Olivia Pulci and Claudio Attaccalite},
	journal={SciPost Phys. Core},
	volume={7},
	pages={081},
	year={2024},
	publisher={SciPost},
	doi={10.21468/SciPostPhysCore.7.4.081},
	url={https://scipost.org/10.21468/SciPostPhysCore.7.4.081},
}