title: Nanoimprinted polymer lasers with threshold below 100 W/cm2 using mixed-order distributed feedback resonators.
abstract: Organic semiconductor lasers were fabricated by UV-nanoimprint lithography with thresholds as low as 57 W/cm(2) 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/cm(2) (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.
authors.affiliation: Organic Semiconductor Centre, SUPA, School of Physics and Astronomy, University of St Andrews, North Haugh, St Andrews, KY16 9SS, UK.
authors.forename: Yue
authors.initials: Y
authors.lastname: Wang
authors.forename: Georgios
authors.initials: G
authors.lastname: Tsiminis
authors.forename: Alexander L
authors.initials: AL
authors.lastname: Kanibolotsky
authors.forename: Peter J
authors.initials: PJ
authors.lastname: Skabara
authors.forename: Ifor D W
authors.initials: ID
authors.lastname: Samuel
authors.forename: Graham A
authors.initials: GA
authors.lastname: Turnbull
mesh_terms: D004735:Energy Transfer; D005246:Feedback; D007834:Lasers; D054802:Molecular Imprinting / Q000379:methods*; D036103:Nanotechnology / Q000295:instrumentation*; D011108:Polymers / Q000737:chemistry* / Q000528:radiation effects; D014159:Transducers
chemical_list: D011108:Polymers