Controlling the emission from semiconductor quantum dots using ultra-small tunable optical microcavities

被引：30
作者：
Di, Ziyun [1 ]
Jones, Helene V. [1 ]
Dolan, Philip R. [1 ]
Fairclough, Simon M. [1 ]
Wincott, Matthew B. [1 ]
Fill, Johnny [1 ]
Hughes, Gareth M. [1 ]
Smith, Jason M. [1 ]
机构：
[1] Univ Oxford, Dept Mat, Oxford OX1 3PH, England
来源：
NEW JOURNAL OF PHYSICS | 2012年 / 14卷
基金：
英国工程与自然科学研究理事会;
关键词：
CAVITY; MODES;
D O I：
10.1088/1367-2630/14/10/103048
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We report the control of spontaneous emission from CdSe/ZnS core-shell quantum dots coupled to novel open-access optical microcavities. The cavities are fabricated by focused ion beam milling and provide mode volumes less than a cubic micrometre. The quantum dot emission spectrum, spatial modes and lifetime are all modified substantially by the presence of the cavity, and can be tuned by actively varying the cavity length. An increase in emission rate of 75% is achieved at room temperature, attributed to the Purcell effect in the 'bad emitter' regime. We demonstrate a high degree of control over the emission from the dots, including near single-mode operation and the ability to detect strong emission from individual nanocrystals.
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页数：10
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