3 results match your criteria: "Institute of Chemical Physics after A.B. Nalbandyan of NAS RA[Affiliation]"
DFT study of GaAs quantum dot and 5CB liquid crystal molecule interaction.
J Mol Graph Model
January 2025
Institute of Chemical Physics after A.B. Nalbandyan of NAS RA, 5/2 P. Sevak St., Yerevan, 0014, Armenia.
Liquid crystals (LC) are widely used in various optical devices due to their birefringence, dielectric anisotropy, and responsive behavior to external fields. Enhancing the properties of existing LCs through doping with nanoparticles, including semiconductor quantum dots, offers a promising route for improving their performance. Among various nanoparticles, QDs stand out for their high charge mobility, sensitivity in the near-infrared spectral region, and cost-effectiveness.
View Article and Find Full Text PDFOptical gain and entanglement through dielectric confinement and electric field in InP quantum dots.
Nanoscale
May 2024
Materials Science Department, University of Patras, 26504 Patras, Greece.
Article Synopsis
- Quantum dots (QDs) are known for their light-emitting properties, but there are still limitations in controlling their characteristics that affect higher-level applications.
- This study focuses on engineering the exciton and biexciton emission order in indium phosphide (InP) QDs embedded in a polymer matrix using size, dielectric confinement, and electric fields.
- Results suggest that smaller QDs (1 nm, 1.5 nm) in materials with high dielectric constants and external electric fields could enable optical gain and photon entanglement, providing a new approach beyond traditional type II core-shell QDs.
Optical Properties of Conical Quantum Dot: Exciton-Related Raman Scattering, Interband Absorption and Photoluminescence.
Nanomaterials (Basel)
April 2023
Department of General Physics and Quantum Nanostructures, Russian-Armenian University, 123 Hovsep Emin Str., Yerevan 0051, Armenia.
The current work used the effective mass approximation conjoined with the finite element method to study the exciton states in a conical GaAs quantum dot. In particular, the dependence of the exciton energy on the geometrical parameters of a conical quantum dot has been studied. Once the one-particle eigenvalue equations have been solved, both for electrons and holes, the available information on energies and wave functions is used as input to calculate exciton energy and the effective band gap of the system.
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