Longitudinal Optical Fields in Light Scattering from Dielectric Spheres and Anderson Localization of Light

Escalante, José M.; Skipetrov, S. E.

doi:10.1002/andp.201700039

Cited by 18 publications

(14 citation statements)

References 35 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…To reach this goal, other disordered photonic structures than just randomly packed spheres have to be invented. One recently proposed way is to use hollow or coated spheres [45] to hinder the propagation of longitudinal evanescent fields responsible for new transport channels [17,46]. Another possible direction may be suggested by nature where, despite the low refractive index material in the exoskeleton of some white beetles (chitin, n = 1.6), light scattering is optimized in an unprecedented way [47].…”

Section: Discussionmentioning

confidence: 99%

Tunable high-index photonic glasses

Schertel

Wimmer

Besirske

et al. 2019

Phys. Rev. Materials

View full text Add to dashboard Cite

Materials with extreme photonic properties such as maximum diffuse reflectance, high albedo, or tunable band gaps are essential in many current and future photonic devices and coatings. While photonic crystals, periodic anisotropic structures, are well established, their disordered counterparts, photonic glasses (PGs), are less understood despite their most interesting isotropic photonic properties. Here, we introduce a controlled high index model PG system. It is made of monodisperse spherical TiO2 colloids to exploit strongly resonant Mie scattering for optimal turbidity. We report spectrally resolved combined measurements of turbidity and light energy velocity from large monolithic crack-free samples. This material class reveals pronounced resonances enabled by the possibility to tune both the refractive index of the extremely low polydisperse constituents and their radius. All our results are rationalized by a model based on the energy coherent potential approximation, which is free of any fitting parameter. Surprisingly good quantitative agreement is found even at high index and elevated packing fraction. This class of PGs may be the key to optimized tunable photonic materials and also central to understand fundamental questions such as isotropic structural colors, random lasing or strong light localization in 3D.

show abstract

Section: Discussionmentioning

confidence: 99%

Tunable high-index photonic glasses

Schertel

Wimmer

Besirske

et al. 2019

Phys. Rev. Materials

View full text Add to dashboard Cite

show abstract

“…Relevant aspects remain to be considered, such as arbitrary polidispersity, more realistic clustering distributions, and particle interaction potentials, or the fact that high-volume concentrations are usually associated with air inclusions as the host matrix cannot perfectly wet all particles. Similarly, it could be interesting to further study multiple scattering for optically soft spheres, where evidence exists for yet a different interplay with correlations [19], as well as for core-shell or spheroidal particles, which are also sometimes associated with enhanced scattering strength [76,77]. Beyond the illustrative case of common paint coatings, further exciting opportunities are open to studying more exotic media that, due to their long-range correlations or multi-scale nature, have been prohibitive for studying numerically in representative 3D geometries.…”

Section: Research Articlementioning

confidence: 99%

Role of packing density and spatial correlations in strongly scattering 3D systems

Pattelli¹,

Egel²,

Lemmer³

et al. 2018

Optica

View full text Add to dashboard Cite

Discrete random media have been investigated extensively over the past century due to their ability to scatter light. Even so, the link between the three-dimensional (3D) spatial distribution of the scattering elements and the resulting opacity is still lively debated to date due to different experimental conditions, range of parameters explored, or sample formulations. On the other hand, a unified numerical survey with controlled parameters has been impractical up to date due to the sheer computational power required to address samples with representative size. In this work, we exploit a graphics processing unit implementation of the T -matrix method to investigate the complete range of particle volume concentration and packing-induced spatial correlations, allowing us to reveal and elucidate a twofold role played by spatial correlations in either enhancing or suppressing opacity. By applying these findings to the illustrative case of white paint, we determine the optimal combination of density and spatial correlations corresponding to the highest opacity.

show abstract

“…Even though coherent light transport in highly multiplescattering media has been studied for years [1], experiments which mainly focused on static or dynamic transmission properties still fail to show signs of this supposedly universal phenomenon for light in three-dimensional media [2,3]. While it is believed that this long-standing quest could be successfully achieved by further tuning the sample properties by optimization of the scattering behavior [4][5][6], signs of localization could be hidden behind other perturbing signals such as absorption or fluorescence [2]. In other words, one may wonder whether the right quantities were measured up to now.…”

Section: Introductionmentioning

confidence: 99%

Magnetic-field effects on one-dimensional Anderson localization of light

et al. 2019

View full text Add to dashboard Cite

Transport of coherent waves in multiple-scattering media may exhibit fundamental, non intuitive phenomena such as halt of diffusion by disorder called Anderson localization. For electromagnetic waves, this phenomenon was observed only in one and two dimensions so far. However, none of these experiments studied the contribution of reciprocal paths nor their manipulation by external fields. In order to weaken the effect of reciprocity of coherent wave transport on Anderson localization in one dimension (1D), we studied light propagation through stacks of parallel Faraday-active glass slides exposed to magnetic fields up to 18 Tesla. Measurements of light transmission statistics are presented and compared to 1D transfer-matrix simulations. The latter reveals a self-organization of the polarization states in this system leading to a saturation of the Faraday rotation-induced reciprocity breaking, an increase of the localization length, and a decrease of transmission fluctuations when reciprocity is broken. This is confirmed experimentally for samples containing small numbers of slides while for larger samples a crossover from a 1D to a quasi-1D transport regime is found.

show abstract

Longitudinal Optical Fields in Light Scattering from Dielectric Spheres and Anderson Localization of Light

Cited by 18 publications

References 35 publications

Tunable high-index photonic glasses

Tunable high-index photonic glasses

Role of packing density and spatial correlations in strongly scattering 3D systems

Magnetic-field effects on one-dimensional Anderson localization of light

Contact Info

Product

Resources

About