Can 3D light localization be reached in ‘white paint’?

Sperling, Tilo; Schertel, Lukas; Ackermann, Mirco; Aubry, Geoffroy J.; Aegerter, Christof M.; Maret, Georg

doi:10.1088/1367-2630/18/1/013039

Cited by 96 publications

(101 citation statements)

References 38 publications

(139 reference statements)

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“…The combination of both methods allows to estimate quantitatively the absorption length: l a 118 µm. Our measurement is in qualitative agreement with transmission time-offlight measurements performed in other TiO 2 samples [29]. An estimation of the transport mean-free path l t is also possible using the relation D = v e l t /3, with v e the energy velocity.…”

Section: (D)]: (I)supporting

confidence: 87%

“…A further step would be to investigate exotic transport phenomena such as super-and sub-diffusion of light [41,42] or, more ambitiously, to provide a direct proof for Anderson localization [43,44]. Past experimental studies of Anderson localization in optics have been ambiguous, due either to absorption effects [45,46] or fluorescence issues [29]. On the contrary, our approach would remove any possible ambiguity.…”

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confidence: 97%

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Spatio-temporal imaging of light transport in highly scattering media under white light illumination

Badon

Lerosey

et al. 2016

Optica

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Imaging the propagation of light in time and space is crucial in optics, notably for the study of complex media. We here demonstrate the passive measurement of time-dependent Green's functions between every point at the surface of a strongly scattering medium by means of low coherence interferometry. The experimental access to this Green's matrix is essential since it contains all the information about the complex trajectories of light within the medium. In particular, the spatio-temporal spreading of the diffusive halo and the coherent backscattering effect can be locally investigated in the vicinity of each point acting as a virtual source. On the one hand, this approach allows a quantitative imaging of the diffusion constant in the scattering medium with a spatial resolution of the order of a few transport mean free paths. On the other hand, our approach is able to reveal and quantify the anisotropy of light diffusion, which can be of great interest for optical characterization purposes. This study opens important perspectives both in optical diffuse tomography with potential applications to biomedical imaging and in fundamental physics for the experimental investigation of Anderson localization. INTRODUCTIONLight is the most common probe for investigating complex media at the mesoscopic scale as it offers both an excellent resolution and is non invasive at moderate energies. Nonetheless, due to the inhomogeneous distribution of refractive index, light suffers multiple scattering while propagating in or through the medium. Unveiling the complexity of light scattering is then necessary to retrieve the features of an object of interest or of the surrounding environment. In an inhomogeneous medium, it is a classical approach to consider a scattering sample as one realization of a random process, and study statistical physical quantities such as the mean intensity [1][2][3]. Under this approach, several physical parameters are relevant to characterize wave propagation in scattering media: the scattering mean-free path l s , the transport mean-free path l t , the diffusion constant D, the absorption length l a . Classical back scattering imaging techniques, such as optical coherence tomography, fail when multiple scattering predominates [4]. However, one can still measure the long-scale spatial variations of the diffusive parameters. The resulting image is not an image of the refractive index n(r) but e.g., of the diffusion constant D(r) with a resolution of the order of the transport mean free path l t , at best. In the literature, diffuse optical tomography is the gold standard technique to reconstruct the spatial distribution of transport parameters at each point of a volume from intensity measurements at the surface [5]. Unfortunately, this inverse problem is intrinsically nonlinear with respect to the optical properties of the medium. This method is thus computationally intensive and limited in terms of spatial resolution [6][7][8] (e.g. 5 mm in human soft tissues).In this paper, we propose a simple and effic...

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Section: (D)]: (I)supporting

confidence: 87%

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confidence: 97%

Spatio-temporal imaging of light transport in highly scattering media under white light illumination

Badon

Lerosey

et al. 2016

Optica

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“…Localization is the rule for large enough 1D and 2D systems, but a genuine, disorder-driven metal-insulator transition, the Anderson transition (AT), occurs in 3D [5,6]. Over the past fifty years, numerous experiments have revealed the delicate intricacies of Anderson localization [7,8,9,10,11,12,13,14].…”

Section: Introductionmentioning

confidence: 99%

Coherent backscattering and forward-scattering peaks in the quantum kicked rotor

et al. 2017

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Abstract. We propose and analyze an experimental scheme using the quantum kicked rotor to observe the newly-predicted coherent forward scattering peak together with its long-known twin brother, the coherent backscattering peak. Contrary to coherent backscattering, which arises already under weak-localization conditions, coherent forward scattering is only triggered by Anderson or strong localization. So far, coherent forward scattering has not been observed in conservative systems with elastic scattering by spatial disorder. We propose to turn to the quantum kicked rotor, which has a long and succesful history as an accurate experimental platform to observe dynamical localization, i.e., Anderson localization in momentum space. We analyze the coherent forward scattering effect for the quantum kicked rotor by extensive numerical simulations, both in the orthogonal and unitary class of disordered quantum systems, and show that an experimental realization involving phase-space rotation techniques is within reach of state-of-the-art cold-atom experiments.arXiv:1612.02091v1 [cond-mat.quant-gas] 7 Dec 2016Coherent back and forward scattering peaks in the quantum kicked rotor 2

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“…This idea was indeed supported by the observation of the destruction of the coherent backscattering cone (CBC, which is often seen as the precursor of Anderson localization) in Faraday active multiple scattering samples [4,11]. While optical waves a e-mail: Geoffroy.Aubry@uni-konstanz.de b e-mail: Georg.Maret@uni-konstanz.de still bear to show signs of localization in 3D samples [12,13] Faraday rotation is still a good candidate for a sensitive probe of Anderson localization of light.…”

Section: Introductionmentioning

confidence: 99%

Coherent multiple light scattering in Faraday active materials

Schertel

Aubry

Aegerter

et al. 2017

Eur. Phys. J. Spec. Top.

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Abstract. Wave propagation in multiple scattering media shows various kinds of coherent phenomena such as coherent backscattering [1,2] or Anderson localization [3], both of which are intimately connected to the concept of reciprocity. Manipulating reciprocity in such media is a powerful tool to study these phenomena in experiments [4]. Here we discuss the manipulation of reciprocity in reflection and transmission geometry for the case of light propagation in magneto-optical media. We show new experiments on coherent backscattering and speckle correlations in strongly scattering samples containing Faraday active materials (CeF 3) with transport mean free path in the μm range, at low temperatures (T < 10 K) and high fields (B = 18 T). Under such conditions we observe the effect of a Faraday rotation saturation in multiple scattering measurements.

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Can 3D light localization be reached in ‘white paint’?

Cited by 96 publications

References 38 publications

Spatio-temporal imaging of light transport in highly scattering media under white light illumination

Spatio-temporal imaging of light transport in highly scattering media under white light illumination

Coherent backscattering and forward-scattering peaks in the quantum kicked rotor

Coherent multiple light scattering in Faraday active materials

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