Reboud, V,Romero-Vivas, J,Lovera, P,Kehagias, N,Kehoe, T,Redmond, G,Torres, CMS

2013

January

Applied Physics Letters

Lasing in nanoimprinted two-dimensional photonic crystal band-edge lasers

Validated

()

OPTICAL GAIN POLYMER LITHOGRAPHY

102

We demonstrate optically pumped polymer band-edge lasers based on a two-dimensional photonic crystal slab fabricated by nanoimprint lithography (NIL). Lasing was obtained at the photonic band-edge, where the light exhibits a low group velocity at the C point of the triangular lattice photonic crystal band structure. The active medium was composed of a dye chromophore-loaded polymer matrix directly patterned in a single step by nanoimprint lithography. Plane-wave and finite difference time domain algorithms were used to predict experimental lasing frequencies and the lasing thresholds obtained at different C points. A low laser threshold of 3 mu J/mm(2) was achieved in a defect-free photonic crystal thus showing the suitability of nanoimprint lithography to produce cost-efficient optically pumped lasers. (C) 2013 American Institute of Physics. [http://dx.doi.org/10.1063/1.4790646]

ARTN 073101