High-order harmonic generation from laser induced plasma comprising CdSe/V2O5 Core/Shell quantum dots embedded on MoS2 nanosheets

TL;DR

This paper investigates how embedding CdSe and CdSe/V2O5 core/shell quantum dots in MoS2 nanosheets enhances high-order harmonic generation, revealing potential for coherent short-wavelength light sources.

Contribution

It demonstrates the enhancement of high-order harmonic generation in MoS2 nanosheets due to the integration of semiconductor quantum dots, a novel approach in nonlinear optics.

Findings

Enhanced harmonic intensity in quantum dot-embedded MoS2

Increased harmonic cut-off frequencies observed

Quantum dots influence the coupling and emission properties

Abstract

Research of the nonlinear optical characteristics of transition metal dichalcogenides in the presence of photoactive particles, plasmonic nanocavities, waveguides, and metamaterials is still in its early stages. This investigation delves into the high-order harmonic generation (HHG) from laser induced plasma of MoS2 nanosheets in the presence of semiconductor photoactive medium such as CdSe and CdSe/V2O5 core/shell quantum dots. Our comprehensive findings shed light on the counteractive coupling impact of both bare and passivated quantum dots on MoS2 nanosheets, as evidenced by the emission of higher-order harmonics. Significantly, the intensity of harmonics and their cut-off were notably enhanced in the MoS2-CdSe and MoS2-V-CdSe configurations compared to pristine MoS2 nanosheets. These advancements hold promise for applications requiring the emission of coherent short-wavelength radiation.