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  • Title: Photonic crystal-assisted light extraction from a colloidal quantum dot/GaN hybrid structure.
    Author: Diana FS, David A, Meinel I, Sharma R, Weisbuch C, Nakamura S, Petroff PM.
    Journal: Nano Lett; 2006 Jun; 6(6):1116-20. PubMed ID: 16771564.
    Abstract:
    We present a study of the light extraction from CdSe/ZnS core/shell colloidal quantum dot thin films deposited on quantum well InGaN/GaN photonic crystal structures. The two-dimensional photonic crystal defined by nanoimprint lithography is used to efficiently extract the guided light modes originating from both the quantum dot thin films and the InGaN quantum wells. Far-field photoluminescence spectra are used to measure the extraction enhancement factor of the quantum dot emission (x1.4). Microphotoluminescence measurements show that the guided mode effective extraction lengths range between 70 and 180 microm, depending on the wavelength of light.
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