Distributed feedback lasers based on perylenediimide dyes for label-free refractive index sensing

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Title: Distributed feedback lasers based on perylenediimide dyes for label-free refractive index sensing
Authors: Morales-Vidal, Marta | Boj Giménez, Pedro | Quintana Arévalo, José Antonio | Villalvilla Soria, José Moisés | Retolaza, Aritz | Merino, Santos | 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
Keywords: Label-free sensors | Organic lasers | Distributed feedback | Photostability | Perylenediimides
Knowledge Area: Física Aplicada | Física de la Materia Condensada | Óptica
Issue Date: 1-Dec-2015
Publisher: Elsevier
Citation: Sensors and Actuators B: Chemical. 2015, 220: 1368-1375. doi:10.1016/j.snb.2015.07.055
Abstract: The refractive index sensing capabilitity of distributed feedback (DFB) lasers based on highly photostable (under ambient conditions) perylenediimide-based active films, are reported. The sensor bulk sensitivity is determined from changes in the laser emission wavelength upon exposure to different liquids. The role of the active film thickness (hf) on the sensor sensitivity and on the laser parameters is studied. Sensors based on very thin films (hf = 160 nm) show the highest sensitivities, but their laser thresholds are relatively high and their operational durabilities moderate. The use of thicker films (hf = 850 nm) allows reducing the laser threshold and increasing the durability by two orders of magnitude. In this case, a higher sensitivity is achieved when the sensor operates at the wavelength corresponding to the first-order TE1 mode, instead of at the TE0 one. Finally, it is also shown that the inclusion of a high refractive index TiO2 layer on top of the sensor structure improves the sensitivity by around two times.
Sponsor: This work was supported by the Spanish Government (MINECO) and the European Community (FEDER) through grant no. MAT-2011–28167-C02. This work was partially funded by the Basque Government within the framework of the Etortek Program (Grant No. IE13-360). M. Morales-Vidal has been partly supported by a MINECO FPI fellowship (no. BES-2009-020747).
URI: http://hdl.handle.net/10045/48952
ISSN: 0925-4005 (Print) | 1873-3077 (Online)
DOI: 10.1016/j.snb.2015.07.055
Language: eng
Type: info:eu-repo/semantics/article
Rights: © 2015 Elsevier B.V.
Peer Review: si
Publisher version: http://dx.doi.org/10.1016/j.snb.2015.07.055
Appears in Collections:INV - Física de la Materia Condensada - Artículos de Revistas
INV - GHPO - Artículos de Revistas

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