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 0003-6951Full text not available in this repository. (Request a copy from the Strathclyde author)
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.
|Keywords:||gratings , substrates, laser excitation, quantum dot lasers , pump lasers , Chemistry, Optics. Light|
|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
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|Depositing user:||Pure Administrator|
|Date Deposited:||25 Oct 2011 10:05|
|Last modified:||17 Jul 2013 11:13|
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