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Low Threshold Quantum Dot Lasers

Iyer, Veena Hariharan and Mahadevu, Rekha and Pandey, Anshu (2016) Low Threshold Quantum Dot Lasers. In: JOURNAL OF PHYSICAL CHEMISTRY LETTERS, 7 (7). pp. 1244-1248.

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Official URL: http://dx.doi.org/10.1021/acs.jpclett.6b00430

Abstract

Semiconductor quantum dots have replaced conventional inorganic phosphors in numerous applications. Despite their overall successes as emitters, their impact as laser materials has been severely limited. Eliciting stimulated emission from quantum dots requires excitation by intense short pulses of light typically generated using other lasers. In this Letter, we develop a new class of quantum dots that exhibit gain under conditions of extremely low levels of continuous wave illumination. We observe thresholds as low as 74 mW/cm(2) in lasers made from these materials. Due to their strong optical absorption as well as low lasing threshold, these materials could possibly convert light from diffuse, polychromatic sources into a laser beam.

Item Type: Journal Article
Additional Information: Copy right for this article belongs to the AMER CHEMICAL SOC, 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
Department/Centre: Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Depositing User: Id for Latest eprints
Date Deposited: 12 May 2016 05:54
Last Modified: 12 May 2016 05:54
URI: http://eprints.iisc.ac.in/id/eprint/53813

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