Large Photonic Strength of Highly Tunable Resonant Nanowire Materials

Muskens, Otto L.; Diedenhofen, Silke L.; Kaas, B. C.; Algra, Rienk E.; Bakkers, Erik P. A. M.; Rivas, Jaime Gómez; Lagendijk, Ad

doi:10.1021/nl802580r

Cited by 150 publications

(120 citation statements)

References 30 publications

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“…67 If C PS is low, l free becomes larger than L; hence, k goes to unity, and the system is no longer in the multiscattering regime. Figure 6A displays both measured and simulated k values as a function of F for phenol red.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Multiscattering-Enhanced Absorption Spectroscopy

2015

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An original scheme for sensitive absorption measurements, particularly well-suited for low analyte concentrations, is presented. The technique is based on multiscattering-enhanced absorption spectroscopy (MEAS) and benefits from the advantages of conventional absorption spectroscopy: simplicity, rapidity, and low costs. The technique relies on extending the optical path through the sensing volume by suspending dielectric beads in the solution containing the analytes of interest, resulting in multiple scattering of light, which increases the optical path length through the sample. This way, a higher sensitivity and lower limit of detection, compared to those of conventional absorption spectroscopy, can be achieved. The approach is versatile and can be used for a broad variety of analytes. Here, it is applied to the detection of phenol red, 10 nm gold nanoparticles, and envy green fluorescence dye; the limit of detection is decreased by a factor of 7.2 for phenol red and a factor of 3.3 for nanoparticles and dye. The versatility of this approach is illustrated by its application in increasing the sensitivity of colorimetric detection with gold nanoparticle probes and a commercially available hydrogen peroxide bioassay. The influence of different parameters describing the scattering medium is investigated in detail experimentally and numerically, with very good agreement between the two. Those parameters can be effectively used to tailor the enhancement for specific applications and analytes.

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Section: ■ Results and Discussionmentioning

confidence: 99%

Multiscattering-Enhanced Absorption Spectroscopy

2015

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“…9(a) and 9(b) for four different samples with scattering strength ranging from k e B = 26 ± 3 to k e B = 3.6 ± 0.8. most strongly scattering nanowire material of Ref. 22. CBS cones (ii) and (iii) in Fig.…”

Section: B Frequency Correlations In Coherent Backscatteringmentioning

confidence: 95%

“…In addition, we also include in our studies two layers of GaP nanowires, which have been shown to be among the most strongly scattering nanomaterials available today. 22 …”

Section: Methodsmentioning

confidence: 99%

Angle dependence of the frequency correlation in random photonic media: Diffusive regime and its breakdown near localization

2011

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The frequency correlations of light in complex photonic media are of interest as a tool for characterizing the dynamical aspects of light diffusion. We demonstrate here that the frequency correlation shows a pronounced angle dependence both in transmission and in reflection geometries. Using a broadband white-light supercontinuum, this angle dependence is characterized and explained theoretically by a combination of propagation effects outside the medium and coherent backscattering. We report a strong dependence of the coherent backscattering contribution on the scattering strength that cannot be explained by the diffusion theory. Our results indicate that coherent backscattering of the frequency correlation forms a sensitive probe for the breakdown of the diffusive regime near localization.

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“…This procedure increased the homogeneity of the layer and reduced the alignment (see Supplementary Section S1). Such compressed semiconductor nanowire mats were shown to be one of the most strongly scattering materials in the visible wavelength range 18 .…”

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confidence: 99%