Studies of the low- and high-order optical nonlinearities of mercury selenide quantum dots using femtosecond pulses

The nonlinear optical properties of the synthesized mercury selenide quantum dots (HgSe QDs) were investigated using near-infrared femtosecond pulses (1030 nm, 40 fs). The two-photon absorption in the HgSe QD suspension was analyzed. The third-harmonic generation was studied using the 70-nm-thick HgSe QDs film. The high-order harmonics generation up to the 37th order in the laser-induced plasmas containing HgSe QDs was demonstrated.