Fluorescence diffraction assisted by Bloch surface waves on a one-dimensional photonic crystal

Angelini, Angelo; Enrico, E.; Leo, Natascia De; Munzert, Peter; Boarino, Luca; Michelotti, Francesco; Giorgis, Fabrizio; Descrovi, Emiliano

doi:10.1088/1367-2630/15/7/073002

Cited by 42 publications

(26 citation statements)

References 27 publications

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“…In addition, individual images corresponding to the R-channel and G-channel intensities are separately shown in a row on top of the RGB image. A polarization analysis shows that the BSW-coupled fluorescence has an inhomogeneous polarization that is azimuthally distributed28, as expected from the TE-polarization of BSW (see Supplementary Figure S6). A more detailed BFP-based analysis of BSW-coupled fluorescence from planar multilayers can be found at Ref.…”

Section: Resultssupporting

confidence: 55%

Focusing and Extraction of Light mediated by Bloch Surface Waves

Angelini

Barakat

Munzert

et al. 2014

Sci Rep

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The control of emission from localized light sources is an objective of outstanding relevance in nanophotonics. In a recent past, a large number of metallic nanostructures has been proposed to this end, wherein plasmonic modes are exploited as energy carriers on a subwavelength scale. As an interesting alternative, we present here the use of surface modes on patterned dielectric multilayers to deliver electromagnetic power from free-space to localized volumes and vice versa. Thanks to this low-loss energy transfer, proper periodic ring structures are shown to provide a subwavelength focusing of an external radiation onto the multilayer surface. By reciprocity, the radiated power from emitters within the ring center is shown to be efficiently beamed in the free-space, with a well-controlled angular divergence. This mechanism overcomes some important limitations involved in the all-plasmonic approach, while opening new opportunities for hybrid devices in photon management applications such as optical sensing and lighting.

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Section: Resultssupporting

confidence: 55%

Focusing and Extraction of Light mediated by Bloch Surface Waves

Angelini

Barakat

Munzert

et al. 2014

Sci Rep

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“…The fluorescence intensity distribution of the bright rings in the case of a linear polarizer demonstrates that the polarization direction of the fluorescence is along the azimuthally direction of the ring which corresponds to the S-polarization or TE polarization and is consistent with the numerical simulations ( Figure 2). 26,27 For comparison, the emitting angles derived from the BFP images and the calculated resonant angles for different thicknesses of the PMMA films are listed in Table I. The experimental results are in very close agreement with the calculations.…”

supporting

confidence: 57%

Polymer-loaded propagating modes on a one-dimensional photonic crystal

Han

Zhang

Chen

et al. 2014

Applied Physics Letters

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We numerically and experimentally demonstrate that a polymer film-coated one-dimensional photonic crystal (1DPC) can sustain transverse electric (TE) polarized modes without the limit of guided layer's thickness. Our results indicate that two propagating modes are existing inside the polymer film, the first one is the TE polarized Bloch surface wave, and the second one is the TE polarized guided mode. Here in, the evolution of these two modes with change in the polymer film thickness is presented. Our numerical simulation results are in well-agreement with the experimental data obtained using back focal plane imaging. V C 2014 AIP Publishing LLC. Optical waveguides are physical structures that guide electromagnetic waves in the optical spectrum. These structures are used as components in integrated optical circuits, as the long distance transmission medium in light wave communications, or for biomedical imaging. Dielectric optical waveguides play a crucial role in the present-day optoelectronics industry. The usual dielectric waveguide cannot restrict the spatial localization of the optical energy beyond the k 0 /2n limit, where the k 0 is the free space photon wavelength and n is the refractive index of the waveguide.1 For this reason, surface plasmon polaritons (SPPs) based waveguides on metallic-dielectric or metallic structures provide a good solution to this problem, due to the shorter wavelength of the SPPs than the photon wavelength at the same frequency.2-4 However, the propagating loss of the SPPs waveguide is very large due to the absorption and scattering by the metallic structures.5 Recently, the polymeric nano-ridges on a one-dimensional photonic crystal (1DPC), made of all dielectric materials, were found to guide optical waves with nano-scale spatial localization and much smaller propagation loss. 6,7 For this kind of 1DPC, Bloch Surface Waves (BSWs) are generated which guide the electromagnetic waves along the interface between the 1DPC and the upper air-space. 8,9 The BSWs are dielectric analogs to the SPPs whose properties are also sensitive to the surrounding medium. [10][11][12][13][14][15][16] In this Letter, we numerically and experimentally investigated the optical properties of the BSWs in the presence and absence of various thicknesses of polymer layer on the upper surface of the 1DPC. The polymer film coated 1DPC can be assumed as an asymmetric planar waveguide, and the polymer film itself can be treated as the guided layer. Our results verify that the guided electromagnetic field becomes more confined with the inclusion of the polymer film even if the thickness of the polymer film is much smaller than the wavelength of the incident light. In other words, for this kind of asymmetric planar waveguide, there is no cut-off thickness of the guided layer, which is certainly favorable for the miniaturization of optoelectronic components down to nanometer scales. The evolution of the optical modes inside the polymer film coated 1DPC is demonstrated theoretically and experimentally.

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“…We expect our structures to be useful for microscopy because the resonances angles are within the collection angle of most high NA immersion objectives. In a recent paper we showed that BSW-coupled emission can be seen in microscopy [79]. …”

Section: Discussionmentioning

confidence: 99%

Radiative decay engineering 6: Fluorescence on one-dimensional photonic crystals

Badugu¹,

Nowaczyk²,

Descrovi³

et al. 2013

Analytical Biochemistry

162

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During the past decade the interactions of fluorophores with metallic particles and surfaces has become an active area of research. These near-field interactions of fluorophores with surface plasmons have resulted in increased brightness and directional emission. However, using metals provide some disadvantages, like quenching at short fluorophore-metal distances, increased rates of energy dissipation due to lossy metals. These unfavorable effects are not expected in dielectrics. In this paper we describe the interactions of fluorophores with one-dimensional (1D) photonic crystals (PCs), which have alternating layers of dielectrics with dimensions that create a photonic bandgap (PBG). Freely propagating light at the PBG wavelength will be reflected. However, similar with metals, we show that fluorophores within near-field distances of the 1DPC interacts with the structure. Our results demonstrated that these fluorophores can interact with both Internal Modes (IM) and Bloch Surface Waves (BSW) of the 1DPC. For fluorophores on the surface of the 1DPC the emission dominantly occurs through the 1DPC and into the substrate. We refer to these two phenomena together as Bragg Grating-Coupled Emission (BGCE). Here we describe our preliminary results on BGCE. 1DPCs are simple to fabricate and can be handled and reused without damage. We believe BGCE provide opportunities for new formats for fluorescence detection and sensing.

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Fluorescence diffraction assisted by Bloch surface waves on a one-dimensional photonic crystal

Cited by 42 publications

References 27 publications

Focusing and Extraction of Light mediated by Bloch Surface Waves

Focusing and Extraction of Light mediated by Bloch Surface Waves

Polymer-loaded propagating modes on a one-dimensional photonic crystal

Radiative decay engineering 6: Fluorescence on one-dimensional photonic crystals

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