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

Morales-Vidal, Marta; Boj, Pedro G.; Quintana, José A.; Villalvilla, José M.; Retolaza, A.; Merino, S.; Díaz-García, María A.

doi:10.1016/j.snb.2015.07.055

Cited by 32 publications

(40 citation statements)

References 45 publications

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“…The photostability half-life is defined as the time or the number of pump pulses at which the emitted laser intensity decays to half of its maximum value. Its sensitivity in the biological range (n = 1.33) is S b = 32 nm/RIU [16], which is comparable to those reported for other singlelayer waveguide DFB biosensors [6,10,12,13]. The sensor resolution was calculated by fitting the central wavelength emission by a center of mass calculation [15], obtaining a resolution of 0.8 pm and a LOD of 2.5 x 10 -5 RIU [16].…”

Section: -Results and Discussionsupporting

confidence: 74%

“…2). Its lasing threshold and the photostability half-life are 200 kW/cm 2 and around 20 min (1.2×10 4 pump pulses), respectively [16]. The photostability half-life is defined as the time or the number of pump pulses at which the emitted laser intensity decays to half of its maximum value.…”

Section: -Results and Discussionmentioning

confidence: 99%

“…Film thickness was determined by the fringe pattern of the absorption spectrum, measured by a Jasco V-650 UV-VIS spectrophotometer. The resonator is a second-order 1D DFB grating with a period of Λ = 376 nm and a grating depth of d = 60 nm, and has been fabricated by thermal-NIL and subsequent reactive ion etching processes [16]. An Atomic Force Microscope micrograph of one of the obtained gratings is shown in Fig.1b.…”

Section: Device Structurementioning

confidence: 99%

“…Considering that the limit of detection (LOD) of the DFB laser sensor is given by the ratio resolution/sensitivity [2], state-of-the art figure-of-merit for DFB laser sensors are around 7×10 -6 RIU [15]. In a previous work [16], we have fabricated a DFB laser based on a polystyrene (PS) film doped with a highly photostable perylenediimide derivative (perylene orange, PDI-O) and demonstrated its use as a bulk refractive index sensor with a LOD of 2.5 × 10 -5 RIU. In the present paper a vertically emitting organic second-order 1D DFB laser composed of PS/PDI-O active film, similar to that recently reported, is demonstrated for label-free biosensing of human epidermal growth factor receptor 2 (ErbB2) protein biomarker.…”

Section: -Introductionmentioning

confidence: 96%

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Organic distributed feedback laser for label-free biosensing of ErbB2 protein biomarker

Retolaza

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Section: -Results and Discussionsupporting

confidence: 74%

Section: -Results and Discussionmentioning

confidence: 99%

Section: Device Structurementioning

confidence: 99%

Section: -Introductionmentioning

confidence: 96%

See 2 more Smart Citations

Organic distributed feedback laser for label-free biosensing of ErbB2 protein biomarker

Retolaza

Martínez-Perdiguero

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et al. 2016

Sensors and Actuators B: Chemical

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“…The DFB emission wavelength ( DFB ) appears close to the wavelength at which the cavity resonates (λ Bragg ), which is determined by the grating period (Λ), the diffraction order (m) and the effective refractive index (n eff ), according to the expression:The n eff parameter depends on the active film thickness (h f ) and on the refractive index of active film, substrate and cover layer (n f , n s and n c , respectively). The principle of operation of previously reported DFB-based bulk refractive index sensors consists on analysing changes in λ DFB upon the deposition over the device of liquid superstrates with different n c values [10,11]. In comparison to other refractive index sensors, organic DFB lasers are very attractive because of their high sensitivity and resolution, simple fabrication and integration with other devices, wavelength tuning capability and small size.…”

mentioning

confidence: 99%

Organic distributed feedback laser to monitor solvent extraction upon thermal annealing in solution-processed polymer films

Boj

Morales-Vidal

Villalvilla

et al. 2016

Sensors and Actuators B: Chemical

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Solution-processed polymer films are used in multiple technological applications. The presence of residual solvent in the film, as a consequence of the preparation method, affects the material properties, so films are typically subjected to post-deposition thermal annealing treatments aiming at its elimination. Monitoring the amount of solvent eliminated as a function of the annealing parameters is important to design a proper treatment to ensure complete solvent elimination, crucial to obtain reproducible and stable material properties and therefore, device performance. Here we demonstrate, for the first time to our knowledge, the use of an organic distributed feedback (DFB) laser to monitor with high precision the amount of solvent extracted from a spin-coated polymer film as a function of the thermal annealing time. The polymer film of interest, polystyrene in the present work, is doped with a small amount of a laser dye as to constitute the active layer of the laser device and deposited over a reusable DFB resonator. It is shown that solvent elimination translates into shifts in the DFB laser wavelength, as a consequence of changes in film thickness and refractive index. The proposed method is expected to be applicable to other types of annealing treatments, polymer-solvent combinations or film deposition methods, thus constituting a valuable tool to accurately control the quality and reproducibility of solution-processed polymer thin films.Polymer thin films, prepared by solution-based methods such as spin-coating, casting, printing, etc. are used in numerous technological applications. Most of the solvent from the polymer solution evaporates during the deposition process, but a part of it remains in the film, which would affect important properties, such as chain mobility, film homogeneity [1] charge carrier transport [2] or substrate adhesion [3]. Therefore, films are typically subjected, right after deposition, to thermal annealing treatments at a temperature above its glass transition temperature, T g , aiming at its elimination. Determining a proper treatment to ensure the complete solvent elimination and consequently device reproducibility and stability has been investigated by several authors [1,4,5,6]. The solvent content in thin spin-coated polymer films subjected to thermal treatments has been quantified using techniques such as gas chromatography [4] and neutron reflectometry [5]. The dependency on film thickness of the treatment and the amount of remaining solvent are still a matter of controversy, probably because of differences in the many factors that affect the polymer morphology. For example, the polymer concentration, the type of solvent, the parameters used in the spin coating process, the thermal annealing time and temperature and the adhesion to the substrate surface.Organic lasers with the active materials in the form of thin waveguide films have received much attention in the last decades due to the advantages of easy processability, chemical versatility, wavelength tunability and low-...

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Plasmonic Enhancement in the Fluorescence of Organic and Biological Molecules by Photovoltaic Tweezing Assembly

Elvira

Muñoz-Martínez

Jubera

et al. 2017

Adv Materials Technologies

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

Cited by 32 publications

References 45 publications

Organic distributed feedback laser for label-free biosensing of ErbB2 protein biomarker

Organic distributed feedback laser for label-free biosensing of ErbB2 protein biomarker

Organic distributed feedback laser to monitor solvent extraction upon thermal annealing in solution-processed polymer films

Plasmonic Enhancement in the Fluorescence of Organic and Biological Molecules by Photovoltaic Tweezing Assembly

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