Lasing emission from Tin disulfide quantum dots

Highlights: • Lasing emission is a good way to exhibit the excellent optical properties of quantum dots. • SnS2 QDs have a promising application as laser gain medium. • The lasing emission excitation threshold value is 19.3 kW/cm2. Lasing emission is a good way to exhibit the excellent optical properties of quantum dots (QDs). In this paper, we synthesize the Tin disulfide (SnS₂) QDs by a facile method of sonication. In a Fabry–Perot laser cavity, the lasing emission at ~500 nm is realized by the SnS₂ QDs with an excitation threshold value of 19.3 kW/cm². The results show that the SnS₂ QDs have a promising application as laser gain medium.