Saturated near-resonant refractive optical nonlinearity in CdTe quantum dots

Abstract

In this work, we report on an experimental investigation of the nonlinear optical properties near the first electronic resonance of thiol-capped CdTe quantum dots (QDs) being in the strong confinement regime. Using a cw laser excitation in a Z-scan experimental setup, we show the presence of saturated Kerr-type nonlinear optical properties of the QDs, at low intensity levels. The large optical nonlinearity and the control of the linear and nonlinear optical properties by the size of the QDs are of special interest for applications in integrated nanophotonic devices.

Three-dimensional FeSe2 microflowers assembled by nanosheets: Synthesis, optical properties, and catalytic activity for the hydrogen evolution reaction

“…These peaks may be attributed to the unusual two-photon absorption, which has been reported in FeSe 2 and CdTe nanoparticles. [31][32][33] The catalytic activity of FeSe 2 for the hydrogen evolution reaction was assessed in a 0.5 M H 2 SO 4 solution using a three-electrode setup. Figure 3(f) shows the polarization curve of the products (the potentials were corrected for the iR drop).…”

Large optical nonlinearities in copolymers with new pendant azobenzene moieties

“…Same huge and tuneable nonlinear optical properties were recently observed in semiconductor quantum dots [4][5][6].…”

Enhancement of nonlinear optical property in ZnS PVA films due to self-assembly

“…[1][2][3] It is well known that the quantum confinement effect modifies the electronic structure of nanocrystals when their diameter is comparable to or smaller than the diameter of the bulk exciton. Zinc sulfide (ZnS) is a commercially important II-VI semiconductor having a wide optical bandgap and it is a vastly studied semiconductor substance with an optical bandgap of 3.54 eV.…”