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Quantum Dot Emission Confined by a Spherical Photonic Dot

โœ Scribed by M. Artemyev; U. Woggon; W. Langbein

Publisher
John Wiley and Sons
Year
2002
Tongue
English
Weight
88 KB
Volume
229
Category
Article
ISSN
0370-1972

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โœฆ Synopsis

The concept of a fully three-dimensional photonic dot is realized in glass microspheres with CdSe quantum dots (QDs) incorporated. The steady-state and time-resolved photoluminescence of QDs is studied with and without coupling to the photonic dot states. It has been found that the radiative lifetime of a single quantum dot is controlled by the photon lifetime of high-Q cavity modes. At T = 20 K, the increase in the radiative recombination rate is demonstrated and Purcell factors between 2 and 5 are measured. Under pulsed ns-excitation, room-temperature lasing in a single photonic dot is achieved.

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