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Quantum Dot Emission Confined by a Spherical Photonic Dot
Author(s) -
Artemyev M.,
Woggon U.,
Langbein W.
Publication year - 2002
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/1521-3951(200201)229:1<423::aid-pssb423>3.0.co;2-#
Subject(s) - quantum dot , photonics , physics , optoelectronics
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.