Title :
Very low threshold of amplified spontaneous emission in II–VI colloidal quantum dots at low exciton number
Author :
Dang, Cuong ; Nurmikko, A.V.
Author_Institution :
Dept. of Phys., Brown Univ., Providence, RI, USA
Abstract :
We demonstrate amplified spontaneous emission from close-packed, II-VI quantum dot (QD) thin films at record low threshold excitation energy corresponding to ~1.2 effective exciton number per QD. Photon statistics from single QDs illustrates the role of excitonic interactions at excitation conditions corresponding to lasing threshold.
Keywords :
III-VI semiconductors; semiconductor quantum dots; spontaneous emission; superradiance; II-VI colloidal quantum dots; amplified spontaneous emission; excitation energy; excitonic interactions; lasing threshold; low exciton number; photon statistics; quantum dot thin films; very low threshold; Excitons; Nanocrystals; Optical films; Optical pulses; Optical pumping; Quantum dots; Spontaneous emission; Statistics; Stimulated emission; Temperature;
Conference_Titel :
Lasers and Electro-Optics (CLEO) and Quantum Electronics and Laser Science Conference (QELS), 2010 Conference on
Conference_Location :
San Jose, CA
Print_ISBN :
978-1-55752-890-2
Electronic_ISBN :
978-1-55752-890-2
