Article Dans Une Revue SciPost Physics Core Année : 2024

Tunable second harmonic generation in 2D materials: comparison of different strategies

Tunable second harmonic generation in 2D materials: comparison of different strategies

Résumé

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 on 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 secondorder 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. These two approaches are investigated and compared with existing experimental results.

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hal-04731724 , version 1 (11-10-2024)

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Simone Grillo, Elena Cannuccia, Maurizia Palummo, Olivia Pulci, Claudio Attaccalite. Tunable second harmonic generation in 2D materials: comparison of different strategies. SciPost Physics Core, 2024, 7 (4), pp.081. ⟨10.21468/SciPostPhysCore.7.4.081⟩. ⟨hal-04731724⟩
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