Electrical transport properties and ultrafast optical nonlinearity of rGO–metal chalcogenide ensembles
Abdulla Bin Rahaman, Atri Sarkar, Tara Singha, Koushik Chakraborty, Snehasish Dutta, Tanusri Pal, Surajit Ghosh, Prasanta Kumar Datta, Debamalya Banerjee
Abstract
) of C2 is ∼1.6 times higher than that of C1 and both the samples depict a positive nonlinear refractive index when measured with 630 nm femtosecond pulses. Moreover, C2 shows a two-fold faster electron transfer rate as revealed by a time resolved fluorescence study than C1. This, along with better dispersion of ZnTe nanoparticles in the rGO matrix, explains why rGO-ZnTe has better optoelectronic properties as compared to the rGO-ZnSe composite. These results in turn make the rGO-ZnTe composite a promising candidate for optoelectronic and photonic device applications.
Topics & Concepts
ChalcogenideUltrashort pulseMaterials scienceMetalNonlinear opticalOptoelectronicsGrapheneNanotechnologyNonlinear systemChemical physicsChemistryOpticsMetallurgyPhysicsLaserQuantum mechanicsNonlinear Optical Materials ResearchNonlinear Optical Materials StudiesPhase-change materials and chalcogenides