NDLI: Control of Optical Emission from Coupled Excitonic States in Quantum Dot Superlattice Structures

Content Provider	IEEE Xplore Digital Library
Author	Nakatani, H. Kita, T. Kojima, O. Wada, O. Akahane, K. Tsuchiya, M.
Copyright Year	2007
Description	Author affiliation: Kobe Univ., Kobe (Nakatani, H.; Kita, T.; Kojima, O.; Wada, O.)
Abstract	Multilayered self-assembled quantum dot (SAQD) structures are indispensable for increasing the SAQD density in practical device applications. The electronic and optical natures of these structures are affected by the spacer-layer thickness; the electronic states in SAQDs can couple vertically with decreasing the thickness. We have confirmed the control of optical emission from such coupled SAQDs, which form a SAQD-superlattice structure. The transverse-magnetic mode of photoluminescence (PL) from the coupled SAQD has been found to be enhanced. The detailed PL analyses have shown bimodal effective size distribution consisting of coupled and uncoupled SAQDs. Also, the relaxation time of the coupled SAQDs has been shown to be longer than that of the uncoupled SAQDs. The present coupled SAQD structure will provide a useful technique of controlling SAQD emission properties.
Starting Page	197
Ending Page	200
File Size	2227334
Page Count	4
File Format	PDF
ISBN	1424408741
ISSN	10928669
DOI	10.1109/ICIPRM.2007.381156
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2007-05-14
Publisher Place	Japan
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Optical control Stimulated emission Optical superlattices Optical coupling Quantum dots Photoluminescence Capacitive sensors Stacking Optical surface waves Indium phosphide
Content Type	Text
Resource Type	Article

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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