Sub-Doppler resonances in the backscattered light from random porous media infused with Rb vapor

Villalba, Santiago; Laliotis, Athanasios; Lenci, Lorenzo; Bloch, Daniel; Lezama, A.; Failache, H.

doi:10.1103/physreva.89.023422

Cited by 10 publications

(12 citation statements)

References 26 publications

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“…In this configuration the incoming beam saturates the atomic medium and the back-scattered field acts as a probe field. The sub-Doppler resonances width are essentially determined by the probe wave-vector dispersion which is mainly determined by detection solid angle [2]. This experiment shows that, as would be expected, for the pores close to the incidence surface the light field has not a diffuse nature but partially preserves the direction of propagation as well as its polarization and phase [4].…”

Section: Introductionsupporting

confidence: 67%

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Spectroscopy of Atoms Confined to Micrometric Pores in Glass

Failache¹,

Amy²,

Villalba³

et al. 2016

Latin America Optics and Photonics Conference

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Section: Introductionsupporting

confidence: 67%

“…Porous glass is a highly scattering medium for light which can appear as detrimental for many applications. However, randomness and disorder could be sometimes a welcome property for some applications as random lasers or alignment insensitive spectroscopical references [2].…”

Section: Introductionmentioning

confidence: 99%

Spectroscopy of Atoms Confined to Micrometric Pores in Glass

Failache¹,

Amy²,

Villalba³

et al. 2016

Latin America Optics and Photonics Conference

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“…For higher atomic densities, such compensation is less effective as photon trapping increases the probability for an excited atom to collide with the pore surface and decay nonradiatively. The same porous medium shows sub-Doppler resonances in the backscattered light due to saturated absorption of the Rb vapor in the interstices of the medium near its surface [21].…”

Section: Introductionmentioning

confidence: 99%

Nonlinear atomic spectroscopy inside a random porous medium

et al. 2014

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We have studied the pump-probe spectroscopy of rubidium vapor confined to the micrometric interstices of a random porous glass. Due to the propagation in the highly scattering medium, the light fields are randomized inside the sample with significant consequences for the atomic spectra. A two-frequency modulation technique was used to isolate the atomic response proportional to the product of the intensities of the pump and probe fields. Unusual line shapes were observed which include relatively narrow structures that are present in spite of the Doppler broadening due to the atomic velocity distribution. A simple theoretical modeling of the light-atom interaction that assumes statistical isotropy of the diffuse light field and mutual temporal incoherence of the pump and probe fields is presented. Using a single adjustable parameter to account for the atomic confinement, the model successfully describes the diversity of the observed spectral line shapes.

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“…Moreover, as both fields follow inside the medium different paths and are scattered idependently, they have a relative phase that varies randomly inside the pores. Base on this random fluctuation of the relative phase, coherent effects could be neglected (atomic coherence and two-photon coherent contribution) and the exited state population was considered proportional to the step-wise two photon contribution [6].…”

Section: Modelmentioning

confidence: 99%

Two-Photon Spectroscopy on Rubidium Vapor Contained in Porous Glass

Amy¹,

Lenci²,

Villalba³

et al. 2017

Opt. Pura Apl.

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We studied spectroscopicaly the fluorescence of a long-lived state of Rubidium for the atomic vapor confined to the micrometric interstices of porous glass cells. The system is studied with the aim of investigating the spectroscopic consequences of the confinement of atoms. The exited level is reached through atom-photon transition. Radiation fields interacting with the atoms in the pores of glass are diffuse due to the propagation in this highly scattering medium. The fluorescence spectra obtained have unusual lineshapes that are well described with a simple theoretical model, considering the diffuse characteristic of the light field. The fluorescence spectra lineshape measured do not exhibit effects due to the three dimensional confinement, however, this effect is noticeable when the fluorescence decay time curves are observed. They show a reduction in its decay time compared with the signal in a cell without confinement.

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Sub-Doppler resonances in the backscattered light from random porous media infused with Rb vapor

Cited by 10 publications

References 26 publications

Spectroscopy of Atoms Confined to Micrometric Pores in Glass

Spectroscopy of Atoms Confined to Micrometric Pores in Glass

Nonlinear atomic spectroscopy inside a random porous medium

Two-Photon Spectroscopy on Rubidium Vapor Contained in Porous Glass

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