Two-photon absorption in ZnO/ZnS and ZnO/ZnS/Ag core-shell quantum dots

LIU Shuyu; ZHONG Mianzeng; MENG Xiuqing; LI Jingbo; WANG Yuanqian; XIAO Si; HE Jun; GAO Yongli

Chinese︱Feedback︱Save this page

• Elaborating Academic Views 　　　　 • Exchanging Innovative Ideas
• Protecting Intellectual Properties 　　• Fast Sharing Science Papers

Sponsored by the Center for Science and Technology Development of the Ministry of Education
Supervised by Ministry of Education of the People's Republic of China

Home > Papers

Two-photon absorption in ZnO/ZnS and ZnO/ZnS/Ag core-shell quantum dots

LIU Shuyu 1 *,ZHONG Mianzeng 2,MENG Xiuqing 2,LI Jingbo 3,WANG Yuanqian 1,XIAO Si 1,HE Jun 1,GAO Yongli 1

1.School of Physics and Electronics, Hunan Key Laboratory for Super-Microstructure and Ultrafast Process, Central South University, Changsha 410083

2.Research Center for Light Emitting Diodes (LED), Zhejiang Normal University, Jinhua 321004

3.State Key Laboratory of Superlattices and Microstructures, Institute of Semiconductors,Chinese Academy of Sciences, P.O. Box 912, Beijing 100083

*Correspondence author

#Submitted by

Subject:

Funding: The National Natural Science Foundation of China （No.Grant Nos. 61222406, 11174371 and 11104250), Natural Science Foundation of Hunan Province）

Opened online:18 April 2014

Accepted by: none

Citation: LIU Shuyu,ZHONG Mianzeng,MENG Xiuqing.Two-photon absorption in ZnO/ZnS and ZnO/ZnS/Ag core-shell quantum dots[OL]. [18 April 2014] http://en.paper.edu.cn/en_releasepaper/content/4593211

We report on large two-photon absorption (TPA) in ZnO/ZnS and ZnO/ZnS/Ag core/shell quantum dots (QDs), determined by both Z-scan and pump-probe techniques with femtosecond laser pulses. The intrinsic TPA coefficients of ZnO-based core/shell QDs are enhanced with nearly three orders of magnitude compared to that of ZnO bulk counterpart, which is attributable to quantum confinement effect. The TPA cross-section of ZnO-based nanocomposites is determined to be ~4.3 × 10-44 cm4 s photon-1 at the wavelength of 660 nm. This value is at least two orders of magnitude greater than that of ZnS, ZnSe, and CdS QDs. Due to the local field effect, the nonlinear absorption in ZnO/ZnS core/shell QDs is improved as beaded with Ag nano-dots.

Keywords:two-photon absorption; ZnO/ZnS core/shell quantum dots; ZnO/ZnS/Ag nanocomposite quantum dots; Z-scan technique

For this paper

● PDF (0B)
● Revision 0 　　
● Print this paper
● Recommend this paper to a friend
● Add to my favorite list

Saved Papers

Please enter a name for this paper to be shown in your personalized Saved Papers list

Tags

Add yours

Related Papers

Other similar papers
● Concentration dependence...
● One-pot Hydrothermal Syn...

Statistics

PDF Downloaded	330
Bookmarked	0
Recommend	5
Comments	Array

Submit your papers

Alert Name:
Alerting to:
Authentication email will be sent to your email address in 24 hours
Frequency:
Email Message Format:	Plain text Graphical(HTML)

Complete the form below and we will recommend the selected titles to your friends on your behalf. * Indicates a required field.
Your name*:
Your email address*:
Recipient's name*:
Recipient's email address*:
(multiple recipient's names and email addresses should be separated with semicolons)
Your comments:	I thought you would find the page(s) useful.

Your name:
Your email address:
Recipient's name:
Recipient's email address:
(multiple recipient's names and email addresses should be separated with semicolons)
Your comments:	I thought you would find this page useful.

Disclaimer: This message was sent to your friend using the "Send it to a friend" facility on the Sciencepaper Online’ WWW site, http://www.paper.edu.cn/en. The Sciencepaper Online is not responsible for the content of this email, and anything said in this email does not necessarily reflect the Sciencepaper Online's views.

	Check out RSS, or use RSS reader to subscribe this item

Saved Papers