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

Intensity-dependent bleaching relaxation in lead salt quantum dots

Not Accessible

Your library or personal account may give you access

Abstract

Bleaching relaxation in lead salt (PbS) quantum dots (QDs) of various sizes and under different pump intensities has been studied. The observed bleaching relaxation features (particularly, shortening of the bleaching relaxation times with a decrease in the QD size and an increase of the pump-light intensity) are explained in the context of the proposed spectroscopic model. The model takes into account transitions of the excited-charge carriers both within the system of quantum-confined energy levels and the defect states of the QDs. The characteristic times of the direct electron-hole recombination, carriers trapping to the defect states, and their subsequent relaxation from these states as well as the cross sections of the ground-state and excited-state absorption of charge carriers can be evaluated from the experimental data for PbS QDs of different sizes and under different pumping conditions using this model.

© 2005 Optical Society of America

Full Article  |  PDF Article
More Like This
Glass doped with PbS quantum dots as a saturable absorber for 1-µm neodymium lasers

A. M. Malyarevich, V. G. Savitski, P. V. Prokoshin, N. N. Posnov, K. V. Yumashev, E. Raaben, and A. A. Zhilin
J. Opt. Soc. Am. B 19(1) 28-32 (2002)

Excitation-wavelength- and size-dependent photo-darkening and photo-brightening of photoluminescence from PbS quantum dots in glasses

Qiaoyun Yin, Chao Liu, Jing Wang, Zhiyong Zhao, Jong Heo, Jun Xie, and Jianjun Han
Opt. Mater. Express 9(2) 504-515 (2019)

Carrier dynamics and optical nonlinearity of alloyed CdSeTe quantum dots in glass matrix

Wenzhi Wu, Zhijun Chai, Yachen Gao, Degui Kong, Feng He, Xianghai Meng, and Yaguo Wang
Opt. Mater. Express 7(5) 1547-1556 (2017)

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 (17)

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