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Moreels I, Raino G, Gomes R, Hens Z, Stoferle T, Mahrt RF.
Adv Mater. 2012 Sep 11;24(35):OP231-5.
IBM Research-Zurich, Saumerstrasse 4, CH-8803 Ruschlikon, Switzerland; Istituto Italiano di Tecnologia, Via Morego 30, IT-16163 Genova, Italy. [email protected]
Abstract
By careful engineering of the core and shell dimensions in CdSe/CdS colloidal hetero-nanocrystals, amplified spontaneous emission can be triggered from either the core, shell, or both states simultaneously. The ASE threshold is almost constant over a temperature interval of 5-325 K. This feature is unique to quantum dots and highlights their potential as a gain material, suitable for lasing at elevated temperatures.
