Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

Optical properties of dielectric thin films including quantum dots

Not Accessible

Your library or personal account may give you access

Abstract

Depending on the minimum size of their micro/nanostructure, thin films can exhibit very different behaviors and optical properties. From optical waveguides down to artificial anisotropy, through diffractive optics and photonic crystals, the application changes when decreasing the minimum feature size. Rigorous electromagnetic theory can be used to model most of the components, but, when the size is a few nanometers, quantum theory also has to be used. The materials, including quantum structures, are of particular interest for many applications, in particular for solar cells because of their luminescent and electronic properties. We show that the properties of electrons in periodic and nonperiodic multiple quantum well structures can be easily modeled with a formalism similar to that used for multilayer waveguides. The effects of different parameters, in particular the coupling between wells and well thickness dispersion, on possible discrete energy levels or the energy band of electrons and on electron wave functions are given. When such quantum confinement appears, the spectral absorption and extinction coefficient dispersion with wavelength are modified. The dispersion of the real part of the refractive index can be deduced from the Kramers–Kronig relations. Associated with homogenization theory, this approach gives a new model of the refractive index for thin films including quantum dots. The bandgap of ZnO quantum dots in solution obtained from the absorption spectrum is in good agreement with our calculation.

© 2010 Optical Society of America

Full Article  |  PDF Article
More Like This
Investigation of nanostructured hybrid organic/semiconductor quantum dots in thin film and spatial distribution of the emission

Hung-Ju Lin, François Flory, Judikael Le-Rouzo, and Cheng-Chung Lee
Appl. Opt. 53(4) A169-A174 (2014)

Optical properties and sub-bandgap formation of nano-crystalline Si quantum dots embedded ZnO thin film

Kuang-Yang Kuo, Shu-Wei Hsu, Pin-Ruei Huang, Wen-Ling Chuang, Chuan-Cheng Liu, and Po-Tsung Lee
Opt. Express 20(10) 10470-10475 (2012)

Synthesis and optical property of water-soluble ZnS:Cu quantum dots by use of thioglycolic acid

Wentao Zhang and Hong-Ro Lee
Appl. Opt. 49(14) 2566-2570 (2010)

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Figures (7)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Tables (1)

You do not have subscription access to this journal. Article tables are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Equations (9)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved