Projects per year
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.
Original language | English |
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Article number | 241103 |
Number of pages | 3 |
Journal | Applied Physics Letters |
Volume | 99 |
Issue number | 24 |
Early online date | 12 Dec 2011 |
DOIs | |
Publication status | Published - 2011 |
Keywords
- gratings
- substrates
- laser excitation
- quantum dot lasers
- pump lasers
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Dive into the research topics of 'Flexible distributed-feedback colloidal quantum dot laser'. Together they form a unique fingerprint.Projects
- 2 Finished
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Gallium nitride enabled hybrid and flexible photonics
Dawson, M., Calvez, S., Gu, E., Martin, R., Skabara, P. & Watson, I.
EPSRC (Engineering and Physical Sciences Research Council)
1/04/11 → 31/03/15
Project: Research
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ADVANCED SOLID STATE LASER SOURCES AND SYSTEMS
Ferguson, A., Burns, D., Calvez, S., Dawson, M., Girkin, J., Hastie, J. & Kemp, A.
EPSRC (Engineering and Physical Sciences Research Council)
1/10/06 → 30/09/11
Project: Research