title: Reduction of the amplified spontaneous emission threshold in semiconducting polymer waveguides on porous silica.
abstract: Hybrid organic-inorganic monomode waveguides of conjugated polymers on porous silicon (PS) substrates have been fabricated. Different low refractive index PS substrates, varying from 1.46 down to 1.18 have been studied. Amplified spontaneous emission (ASE) has been observed for all the samples and the ASE threshold has been monitored as a function of the PS refractive index. A decrease in the ASE threshold is detected when the PS refractive index decreases. These results have been analysed in the frame of a four level waveguide amplifier model and the theoretical predictions are in agreement with the experimental data.
authors.affiliation: Departamento Física Fundamental y Experimental, Electrónica y Sistemas-Instituto Universitario de Estudios Avanzados en Física Molecular, Atómica y Fotónica, Universidad de La Laguna, 38206 La Laguna, Tenerife, Spain. flahoz@ull.es
authors.forename: Fernando
authors.initials: F
authors.lastname: Lahoz
authors.forename: Claudio J
authors.initials: CJ
authors.lastname: Oton
authors.forename: Nestor
authors.initials: N
authors.lastname: Capuj
authors.forename: Miriam
authors.initials: M
authors.lastname: Ferrer-González
authors.forename: Stephanie
authors.initials: S
authors.lastname: Cheylan
authors.forename: Daniel
authors.initials: D
authors.lastname: Navarro-Urrios