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Title: Surface-emitting red, green, and blue colloidal quantum dot distributed feedback lasers
Authors: Roh, Kwangdong
Dang, Cuong
Lee, Joonhee
Chen, Songtao
Steckel, Jonathan S.
Coe-Sullivan, Seth
Nurmikko, Arto
Keywords: DRNTU::Engineering::Electrical and electronic engineering::Optics, optoelectronics, photonics
Issue Date: 2014
Source: Roh, K., Dang, C., Lee, J., Chen, S., Steckel, J. S., Coe-Sullivan, S., et al. (2014). Surface-emitting red, green, and blue colloidal quantum dot distributed feedback lasers. Optics Express, 22(15), 18800-18806.
Series/Report no.: Optics express
Abstract: We demonstrate surface emitting distributed feedback (DFB) lasers across the red, green, and blue from densely packed colloidal quantum dot (CQD) films. The solid CQD films were deposited on periodic grating patterns to enable 2nd-order DFB lasing action at mere 120, 280, and 330 μJ/cm2 of optical pumping energy densities for red, green, and blue DFB lasers, respectively. The lasers operated in single mode operation with less than 1 nm of full-width-half-maximum. We measured far-field patterns showing high degree of spatial beam coherence. Specifically, by taking advantage of single exciton optical gain regime from our engineered CQDs, we can significantly suppress the Auger recombination to reduce lasing threshold and achieve quasi-steady state, optically pumped operation.
ISSN: 1094-4087
DOI: 10.1364/OE.22.018800
Schools: School of Electrical and Electronic Engineering 
Rights: © 2014 Optical Society of America. This paper was published in Optics Express and is made available as an electronic reprint (preprint) with permission of Optical Society of America. The paper can be found at the following official DOI:  One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law.
Fulltext Permission: open
Fulltext Availability: With Fulltext
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