Fluorescence excitation enhancement by Bloch surface wave in all-polymer one-dimensional photonic structure

Fornasari, Lucia; Floris, Francesco; Patrini, M.; Canazza, Giancarlo; Guizzetti, G.; Comoretto, Davide; Marabelli, F.

doi:10.1063/1.4892423

Cited by 32 publications

(26 citation statements)

References 23 publications

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“…In the absence of metal, BSWs can be generated on top surface of this 1DPC [17]. The resonant wavelength and resonant angle of BSWs are strongly dependent on the structural parameters and sensitive to the surrounding medium, which enables applications in sensing and fluorescence emission (direction or spectral) modulation [43–48]. For the present paper this 1DPC was coated with silver films.…”

Section: : Samples Preparation and Numerical Simulationmentioning

confidence: 99%

Effect of metal film thickness on Tamm plasmon-coupled emission

Chen

Zhang

Zhu

et al. 2014

Phys. Chem. Chem. Phys.

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Tamm plasmons (TPs) are the result of trapping optical energy at the interface between a metal film and a one-dimensional photonic crystal. In contrast to surface plasmons, TPs display unique properties such as the ability of direct optical excitation without the aid of prisms, or gratings, being populated using both S- and P- polarized light, and importantly, they can be created with incident light normal to the surfaces. This latter property has recently been used to obtain Tamm plasmon-coupled emission (TPCE) which beams along a path directly perpendicular to the surface. In this paper the effects of metal film thickness on TPCE are investigated using back focal plane (BFP) imaging and spectral resolutions. The observed experimental results are in agreement with the numerical simulations. The present work provides the basic understanding to design the structures for TPCE, which in turn has potential applications in the fabrication of the active material for light emitting devices, fluorescence based-sensing using microarrays and imaging.

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Section: : Samples Preparation and Numerical Simulationmentioning

confidence: 99%

Effect of metal film thickness on Tamm plasmon-coupled emission

Chen

Zhang

Zhu

et al. 2014

Phys. Chem. Chem. Phys.

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“…By considering photonic crystal structures solely composed of polymer films, the main growth techniques usually adopted are based on block‐copolymers self‐assembly, coextrusion, and spin coating, even though expensive and time consuming ones like holographic lithography, or plasma vapor deposition (a technique suitable for radical polymerization only) are also used. Among them, spin coating allows for a fast and simple preparation of one‐dimensional (1D) planar PhC structures such as Distributed Bragg Reflectors (DBR, multilayers of two alternated materials) and microcavities (for an extended review on this topics, see ref.…”

Section: Introductionmentioning

confidence: 99%

High refractive index hyperbranched polyvinylsulfides for planar one‐dimensional all‐polymer photonic crystals

Gazzo

Manfredi

Pötzsch

et al. 2015

J Polym Sci B Polym Phys

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We report on the growth and characterization of onedimensional\ud (1D) planar all-polymer photonic crystals (PhC) with\ud high dielectric contrast (Dn50.3) prepared by spin coating using\ud hyperbranched polyvinylsulfide polymers (HB-PVS) as high\ud refractive index material and cellulose acetate as low refractive\ud index material. Solution processable HB-PVS show a near ultraviolet\ud absorption inducing an increased refractive index in the\ud visible-near infrared (n51.68, k51000 nm). HBPVS:Cellulose\ud Acetate Distributed Bragg Reflectors show a very clear fingerprint\ud of the photonic band gap possessing the expected polarized\ud dispersion properties as a function of the incidence angle.\ud Moreover, engineered microcavities tuned on the weak fluorescence\ud spectrum of the HB-PVS show directional fluorescence\ud enhancement effects due to spectral redistribution of the emission\ud oscillator strength. The combination of all these properties\ud testifies the high optical quality of the obtained photonic structures\ud thus indicating HB-PVS as an interesting material for the\ud preparation of such PhC. V

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“…The complex refractive index (n+ik) of bare polymer films was determined by spectroscopic ellipsometry (SOPRA ES4G). A first rough evaluation of the refractive index of the nanocomposite has been obtained by using the Maxwell-Garnett effective medium theory [13,32,57]. Reflectance and transmittance spectroscopy was performed using optical setups based on optical fiber coupled Avantes 2048 spectrometers (200-1100 nm, resolution 1.4 nm) and on Arcoptics FT-interferometer (900-2600 nm, resolution 8 cm -1 ).…”

Section: Methodsmentioning

confidence: 99%

Hybrid ZnO:polystyrene nanocomposite for all‐polymer photonic crystals

Lova

Manfredi

Boarino

et al. 2014

Phys. Status Solidi C

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We report on ZnO nanoparticles‐polystyrene (PS) nanocomposites (NC) engineered to modify PS matrix permeability and refractive index (n), and to fabricate 1D all‐polymer photonic crystals (PC) for sensing applications. The new NC can be easily processed from solutions to prepare high quality thin films by spin coating. ZnO nanoparticles (n = 1.98) have been synthetized by solvothermal route and grafted with a silane to reduce phase segregation in the PS matrix (n = 1.58). Such procedure led to an increase of the matrix refractive index of about 1%. By casting alternated layers of the NC and cellulose acetate (CA, n = 1.46), we fabricated free‐standing and flexible distributed Bragg reflectors (DBRs) of excellent optical quality. Preliminary results on the use of such DBRs as solvent vapor sensors are reported. (© 2015 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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Fluorescence excitation enhancement by Bloch surface wave in all-polymer one-dimensional photonic structure

Cited by 32 publications

References 23 publications

Effect of metal film thickness on Tamm plasmon-coupled emission

Effect of metal film thickness on Tamm plasmon-coupled emission

High refractive index hyperbranched polyvinylsulfides for planar one‐dimensional all‐polymer photonic crystals

Hybrid ZnO:polystyrene nanocomposite for all‐polymer photonic crystals

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