Nanoimprinted distributed feedback lasers of solution processed hybrid perovskites

Whitworth, Guy L., Harwell, Jonathan R., Miller, David N. , Hedley, Gordon J., Zhang, Wei, Snaith, Henry J., Turnbull, Graham A. and Samuel, Ifor D. W. (2016) Nanoimprinted distributed feedback lasers of solution processed hybrid perovskites. Optics Express, 24 (21). pp. 23677-23684. ISSN 1094-4087

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Hybrid perovskite materials have considerable potential for light emitting devices such as LEDs and lasers. We combine solution processed CH3NH3PbI3 perovskite with UV nanoimprinted polymer gratings to fabricate distributed feedback (DFB) lasers. The lead acetate deposition route is shown to be an effective method for fabricating low-loss waveguides (loss coefficient ~6 cm-1) and highly compatible with the polymer grating substrates. The nanoimprinted perovskite exhibited single-mode band-edge lasing, confirmed by angle-dependent transmission measurements. Depending on the excitation pulse duration the lasing threshold shows a value of 110 μJ/cm2 under nanosecond pumping and 4 μJ/cm2 under femtosecond pumping. We demonstrate further that this laser has excellent stability with a lifetime of 10*8 pulses.

Keywords:Nanoimprinting, distributed feedback lasers, perovskites, solution processed, JCOpen
Subjects:F Physical Sciences > F200 Materials Science
F Physical Sciences > F361 Laser Physics
Divisions:College of Science > School of Chemistry
ID Code:24638
Deposited On:12 Oct 2016 13:22

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