Controlling the emission properties of solution-processed organic distributed feedback lasers through resonator design

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Title: Controlling the emission properties of solution-processed organic distributed feedback lasers through resonator design
Authors: Bonal, Víctor | Quintana Arévalo, José Antonio | Villalvilla Soria, José Moisés | Boj Giménez, Pedro | Díaz-García, María A.
Research Group/s: Física de la Materia Condensada
Center, Department or Service: Universidad de Alicante. Departamento de Física Aplicada | Universidad de Alicante. Departamento de Óptica, Farmacología y Anatomía | Universidad de Alicante. Instituto Universitario de Materiales
Keywords: Distributed feedback lasers | Organic lasers | Polymeric resonators | Solution-processed
Knowledge Area: Física Aplicada | Óptica | Física de la Materia Condensada
Issue Date: 1-Aug-2019
Publisher: Springer Nature
Citation: Scientific Reports. 2019, 9: 11159. doi:10.1038/s41598-019-47589-4
Abstract: Surface-emitting distributed feedback (DFB) lasers with both, resonator and active material based on solution-processable polymers, are attractive light sources for a variety of low-cost applications. Besides, the lasers should have competitive characteristics compared to devices based on high-quality inorganic resonators. Here, we report high performing all-solution-processed organic DFB lasers, consisting of water-processed photoresist layers with surface relief gratings located over the active films, whose emission properties can be finely tuned through resonator design. Their laser threshold and efficiency are simultaneously optimized by proper selection of residual resist thickness and grating depth, d. Lowest thresholds and largest efficiencies are obtained when there is no residual layer, while a trade-off between threshold and efficiency is found in relation to d, because both parameters decrease with decreasing d. This behaviour is successfully explained in terms of an overlap factor r, defined to quantify the interaction strength between the grating and the light emitted by the active film and traveling along it, via the evanescent field. It is found that optimal grating depths are in the range 100–130 nm (r ~ 0.5−0.4). Overall, this study provides comprehensive design rules towards an accurate control of the emission properties of the reported lasers.
Sponsor: Financial support from Spanish Ministerio de Economía y Competitividad (MINECO) and the European FEDER funds through Grant MAT2015-66586-R.
URI: http://hdl.handle.net/10045/95391
ISSN: 2045-2322
DOI: 10.1038/s41598-019-47589-4
Language: eng
Type: info:eu-repo/semantics/article
Rights: © The Author(s) 2019. Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
Peer Review: si
Publisher version: https://doi.org/10.1038/s41598-019-47589-4
Appears in Collections:INV - Física de la Materia Condensada - Artículos de Revistas

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