Open AccessQuantum theory of electroabsorption in semiconductor nanocrystals
Author(s) -
Nikita V. Tepliakov,
Mikhail Yu. Leonov,
А. В. Баранов,
Anatoly V. Fedorov,
Ivan D. Rukhlenko
Publication year - 2015
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.24.000a52
Subject(s) - nanorod , quantum dot , nanocrystal , semiconductor , electric field , stark effect , materials science , optoelectronics , quantum , absorption (acoustics) , electron , quantum confined stark effect , electro absorption modulator , field (mathematics) , optics , physics , nanotechnology , quantum dot laser , semiconductor laser theory , quantum mechanics , mathematics , pure mathematics
We develop a simple quantum-mechanical theory of interband absorption by semiconductor nanocrystals exposed to a dc electric field. The theory is based on the model of noninteracting electrons and holes in an infinitely deep quantum well and describes all the major features of electroabsorption, including the Stark effect, the Franz-Keldysh effect, and the field-induced spectral broadening. It is applicable to nanocrystals of different shapes and dimensions (quantum dots, nanorods, and nanoplatelets), and will prove useful in modeling and design of electrooptical devices based on ensembles of semiconductor nanocrystals.