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

Organic semiconductor lasers were fabricated by UV-nanoimprint 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 green-emitting 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.

Wang, Y., Tsiminis, G., Kanibolotsky, A. L., Skabara, P. J., Samuel, I. D., & Turnbull, G. A. (2013). Nanoimprinted polymer lasers with threshold below 100 W/cm 2 using mixed-order distributed feedback resonators. Optics express, 21(12), 14362-14367.
https://doi.org/10.1364/OE.21.014362

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