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Nanoimprinted polymer lasers with threshold below 100 W/cm2 using mixed-order distributed feedback resonators

Wang, Yue Y. and Tsiminis, Georgios G. and Kanibolotsky, Alexander L. A.L. and Skabara, Peter J. P.J. and Samuel, Ifor D W I.D.W. and Turnbull, Graham A. G.A. (2013) Nanoimprinted polymer lasers with threshold below 100 W/cm2 using mixed-order distributed feedback resonators. Optics Express, 21 (12). pp. 14362-14367. ISSN 1094-4087

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Abstract

Organic semiconductor lasers were fabricated by UVnanoimprint lithography with thresholds as low as 57 W/cm2 under 4 ns pulsed operation. The nanoimprinted lasers employed mixed-order distributed feedback resonators, with second-order gratings surrounded by first-order gratings, combined with a light-emitting conjugated polymer. They were pumped by InGaN LEDs to produce greenemitting lasers, with thresholds of 208 W/cm2 (102 nJ/pulse). These hybrid lasers incorporate a scalable UV-nanoimprint lithography process, compatible with high-performance LEDs, therefore we have demonstrated a coherent, compact, low-cost light source.