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

Ultrafast carrier dynamics and coherent acoustic phonons in bulk CdSe

Not Accessible

Your library or personal account may give you access

Abstract

The femtosecond pump-probe technique is used to study the dynamics of photoexcited carriers and coherent acoustic phonons in bulk CdSe semiconductor. A turning point from fast to slow decay is observed, whose amplitude decreases with pump fluences and eventually flips the sign of differential reflectivity. The maximum change of differential reflectivity shows a saturation at high pump fluences, which is attributed to the optical energy gap dependent on carrier density. Long-lasting coherent oscillations of acoustic phonons have also been detected, and their amplitude and lifetime have a strong dependence on pump fluences. Our results can facilitate the understanding of ultrafast carrier and phonon dynamics in CdSe nanocrystals.

© 2014 Optical Society of America

Full Article  |  PDF Article
More Like This
Ultrafast optical detection of coherent acoustic phonons emission driven by superdiffusive hot electrons

Mariusz Lejman, Viktor Shalagatskyi, Oleksandr Kovalenko, Thomas Pezeril, Vasily V. Temnov, and Pascal Ruello
J. Opt. Soc. Am. B 31(2) 282-290 (2014)

Effect of alloying on the dynamics of coherent acoustic phonons in bismuth double perovskite single crystals

Xihong Lin, Bo Wu, Weihua Ning, Minjun Feng, Qiang Xu, Feng Gao, Tze Chien Sum, and Guofu Zhou
Opt. Express 29(5) 7948-7955 (2021)

Ultrafast photocarrier and coherent phonon dynamics in type-II Dirac semimetal PtTe2 thin films probed by optical spectroscopy

Peng Suo, Shengnan Yan, Ruihua Pu, Wenjie Zhang, Di Li, Jiaming Chen, Jibo Fu, Xian Lin, Feng Miao, Shi-Jun Liang, Weimin Liu, and Guohong Ma
Photon. Res. 10(3) 653-661 (2022)

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 (4)

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

Equations (5)

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