Intensity-Dependent Optical Response of 2D LTMDs Suspensions: From Thermal to Electronic Nonlinearities

• Published in: Nanomaterials (Basel, Switzerland) Vol. 13; no. 15; p. 2267
• Main Authors: Gomes, Anderson S L, Campos, Cecília L A V, de Araújo, Cid B, Maldonado, Melissa, da Silva-Neto, Manoel L, Jawaid, Ali M, Busch, Robert, Vaia, Richard A
• Format: Journal Article
• Language: English
• Published: Switzerland MDPI AG 07.08.2023; MDPI
• Subjects: Absorptivity; Analysis; bidimensional transition metal dichalcogenides; Chemical synthesis; Electric properties; electronic optical nonlinearity; Fourier transforms; Frequency; Graphene; Identification and classification; Measurement techniques; Methods; Molybdenum disulfide; Morphology; Nanomaterials; Nanotechnology; Nonlinear optics; Nonlinear response; Nonlinearity; Optical properties; Optics; Optoelectronics; Phase modulation; Photonics; Rayleigh scattering; Review; Semiconductors; Spectrum analysis; Temporal variations; thermal optical nonlinearity; Thermal properties; Transition metal compounds; Brazil; Chile; electronic optical nonlinearity; bidimensional transition metal dichalcogenides; thermal optical nonlinearity
• ISSN: 2079-4991; 2079-4991
• DOI: 10.3390/nano13152267

The nonlinear optical (NLO) response of photonic materials plays an important role in the understanding of light-matter interaction as well as pointing out a diversity of photonic and optoelectronic applications. Among the recently studied materials, 2D-LTMDs (bi-dimensional layered transition metal dichalcogenides) have appeared as a beyond-graphene nanomaterial with semiconducting and metallic optical properties. In this article, we review most of our work in studies of the NLO response of a series of 2D-LTMDs nanomaterials in suspension, using six different NLO techniques, namely hyper Rayleigh scattering, Z-scan, photoacoustic Z-scan, optical Kerr gate, and spatial self-phase modulation, besides the Fourier transform nonlinear optics technique, to infer the nonlinear optical response of semiconducting MoS , MoSe , MoTe , WS , semimetallic WTe , ZrTe , and metallic NbS and NbSe . The nonlinear optical response from a thermal to non-thermal origin was studied, and the nonlinear refraction index and nonlinear absorption coefficient, where present, were measured. Theoretical support was given to explain the origin of the nonlinear responses, which is very dependent on the spectro-temporal regime of the optical source employed in the studies.