Internal reflection of diffusive light in random media

Zhu, Jixiang; Pine, David J.; Weitz, D. A.

doi:10.1103/physreva.44.3948

Cited by 332 publications

(288 citation statements)

References 10 publications

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“…The effect of internal reflections can be included inH following, for example, Zhu et al 20 The diffuse propagatorH , in principle, depends on the optical frequency ω through the dispersion of the parameters v E , B , τ a , and D in Eq. (5).…”

Section: A Angle-dependent Frequency Correlations In Transmissionmentioning

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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Section: A Angle-dependent Frequency Correlations In Transmissionmentioning

confidence: 99%

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

2011

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“…Here z e1 and z e2 are the extrapolation lengths of the medium that are related to the effective refractive index [31], and T surf accounts for the reflections at the two sample boundaries that depend on the refractive indices of the surrounding materials (either n glass = 1.45 or n air = 1.0). Fitting the experimental data of Fig.…”

Section: B Sample Characterizationmentioning

confidence: 99%

Continuous-wave spatial quantum correlations of light induced by multiple scattering

et al. 2012

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We present theoretical and experimental results on spatial quantum correlations induced by multiple scattering of nonclassical light. A continuous mode quantum theory is derived that enables determining the spatial quantum correlation function from the fluctuations of the total transmittance and reflectance. Utilizing frequency-resolved quantum noise measurements, we observe that the strength of the spatial quantum correlation function can be controlled by changing the quantum state of an incident bright squeezed-light source. Our results are found to be in excellent agreement with the developed theory and form a basis for future research on, e.g., quantum interference of multiple quantum states in a multiple scattering medium.

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“…46,47 The penetration depth of the incident light is included in the parameter ξ ≡ 1+ℓ/L B . The Bragg length varies between infinity (no Bragg diffraction) and 2d 111 /πS, with S = 0.06 the photonic strength and d 111 the lattice constant in the (111)-direction.…”

Section: Model Calculation Of Band Structure Effects On Angle-depmentioning

confidence: 99%

“…(3), the internal reflection R is obtained by angle-averaging for every frequency using [46][47][48] …”

Section: B Internal Reflectionmentioning

confidence: 99%

Broadband coherent backscattering spectroscopy of the interplay between order and disorder in three-dimensional opal photonic crystals

2011

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We present an investigation of coherent backscattering of light that is multiple scattered by a photonic crystal by using a broad-band technique. The results significantly extend on previous backscattering measurements on photonic crystals by simultaneously accessing a large frequency and angular range. Backscatter cones around the stop gap are successfully modelled with diffusion theory for a random medium. Strong variations of the apparent mean free path and the cone enhancement are observed around the stop band. The variations of the mean free path are described by a semi-empirical three-gap model including band structure effects on the internal reflection and penetration depth. A good match between theory and experiment is obtained without the need of additional contributions of group velocity or density of states. We argue that the cone enhancement reveals additional information on directional transport properties that are otherwise averaged out in diffuse multiple scattering.

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Internal reflection of diffusive light in random media

Cited by 332 publications

References 10 publications

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

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

Continuous-wave spatial quantum correlations of light induced by multiple scattering

Broadband coherent backscattering spectroscopy of the interplay between order and disorder in three-dimensional opal photonic crystals

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