Photoluminescence properties of CdSe/ZnS/TOPO nanocrystals in full- and half-microcavity structures

被引：2
作者：
Oda, Masaru [1 ,2 ]
Kazita, Hiroyuki [2 ]
Obara, Yuki [2 ]
Tani, Toshiro [1 ,2 ]
机构：
[1] Tokyo Univ Agr & Technol, Inst Engn, Div Adv Appl Phys, Naka Cho 2-24-16, Koganei, Tokyo 1848588, Japan
[2] Tokyo Univ Agr & Technol, Dept Appl Phys, Koganei, Tokyo 184, Japan
来源：
PHYSICA STATUS SOLIDI C: CURRENT TOPICS IN SOLID STATE PHYSICS, VOL 8, NO 2 | 2011年 / 8卷 / 02期
关键词：
nanocrystal; microcavity; exciton; photoluminescence;
D O I：
10.1002/pssc.201000526
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
We report a recent study on photoluminescence (PL) properties of CdSe/ZnS/TOPO nanocrystals (NCs) in a planar full microcavity composed of top and bottom two metal (Ag) mirrors, and also in a similar structure but without top mirror, i.e. half-microcavity, respectively. Angular-dependencies of PL spectra and PL decay curves have been measured to investigate PL modifications due to light-matter coupling in the microcavities. Obtained results indicate that PL dynamics are drastically changed depending on the microcavity structures. In the full-microcavity, PL emission is directed at particular angles and its decay-time is shortened, both of which can be described in terms of so-called Purcell effect, i.e. the interaction between photon- modes and confined excitons in the NCs. As for the half-microcavity, anomalous PL band appears at low energy side of a main PL band associated with the confined excitons. The origin of the anomalous PL will be interpreted as due to the interaction between specific photon-modes in the half-microcavity structure and excitons associated with surface states. (C) 2010 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
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页码：423 / 425
页数：3
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