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Flexible distributed-feedback colloidal quantum dot laser

Chen, Yujie and Guilhabert, Benoit Jack Eloi and Herrnsdorf, Johannes and Zhang, Yanfeng and Mackintosh, Allan and Pethrick, Richard and Gu, Erdan and Laurand, Nicolas and Dawson, Martin (2011) Flexible distributed-feedback colloidal quantum dot laser. Applied Physics Letters, 99 (24). p. 1069. ISSN 0003-6951

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Abstract

Flexible distributed feedback colloidal quantum dot laser patterned by a submicron grating structure is reported. An exposed standard commercial blank digital versatile disk (DVD) was used as the mask to fabricate a submicron scale grating structure, providing a simple and low-cost approach. A UV transparent polymerisable host matrix, 1,4-cyclohexanedimethanol divinyl ether (CHDV), was then photo-cured to replicate the DVD grating structure and peeled off from the mask, resulting in a flexible grating. The thickness of the grating substrate can be controlled in the range of 50 to 300 μm. A frequency-tripled Q-switched Nd:YAG laser (5-ns pulse, 10-Hz repetition rate and 355-nm excitation wavelength) was then used to photo-pump the CQD sample. The emission evolution was investigated and a 4 mJ/cm2 lasing threshold was found, comparing favourably to other reports of CQD lasers. The polarisation of the laser emission revealed that the DFB CQD laser favours a linearly polarized (TE) emission. During the experiment, the laser performance, operating above lasing threshold at room temperature and ambient atmosphere, was stable over more than 10,000 pump pulses.

Item type: Article
ID code: 35054
Keywords: gratings , substrates, laser excitation, quantum dot lasers , pump lasers , Chemistry, Optics. Light, Physics and Astronomy (miscellaneous)
Subjects: Science > Chemistry
Science > Physics > Optics. Light
Department: Faculty of Science > Physics
Faculty of Science > Institute of Photonics
Faculty of Science > Pure and Applied Chemistry
Technology and Innovation Centre > Photonics
Related URLs:
Depositing user: Pure Administrator
Date Deposited: 25 Oct 2011 10:05
Last modified: 28 Mar 2014 05:44
URI: http://strathprints.strath.ac.uk/id/eprint/35054

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