Anderson localization of light: Strong dependence with incident angle

Jimenez-Villar, Ernesto; Xavier, M. C. S.; Wetter, Niklaus Ursus; Mestre, Valdeci; Martins, Weliton S.; Basso, Gabriel F.; Ermakov, V. A.; Marques, F. C.; de, Gilberto F.

doi:10.48550/arxiv.1705.09262

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“…A detailed study with a detection system of more resolution and sensibility is called for, to more precisely determine the linewidth of the RL peaks and their relationship with τ eO , as well as the physical origin of τ eO . Moreover, an expanded study varying the pumping and collection angles 50 would allow a better understanding of the RL operation at the localization transition.…”

Section: ■ Introductionmentioning

confidence: 99%

Random Lasing at Localization Transition in a Colloidal Suspension (TiO₂@Silica)

Jiménez‐Villar

Silva²,

Mestre

et al. 2017

ACS Omega

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Anderson localization of light and random lasing in this critical regime is an open research frontier, which besides being a basic research topic could also lead to important applications. This article investigates the random laser action at the localization transition in a strongly disordered scattering medium composed of a colloidal suspension of core–shell nanoparticles (TiO 2 @Silica) in ethanol solution of Rhodamine 6G. The classical superfluorescence band of the random laser was measured separately by collecting the emission at the back of the samples, showing a linear dependence with pumping fluence without gain depletion. However, frontal collection showed saturation of the absorption and emission. Narrow peaks of approximately equal intensity are observed on top of the classical superfluorescence band, indicating suppression of the interaction between the peaks modes. The linewidth of these peaks is lower than that of the passive modes of the scattering medium. A method called fraction of absorbed pumping allowed us to infer that this peak’s mode (localized modes) is confined to a shallow region near the input-pumping border.

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Section: ■ Introductionmentioning

confidence: 99%

Random Lasing at Localization Transition in a Colloidal Suspension (TiO₂@Silica)

Jiménez‐Villar

Silva²,

Mestre

et al. 2017

ACS Omega

Self Cite

View full text Add to dashboard Cite

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Anderson localization of light: Strong dependence with incident angle

Cited by 1 publication

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Random Lasing at Localization Transition in a Colloidal Suspension (TiO₂@Silica)

Random Lasing at Localization Transition in a Colloidal Suspension (TiO₂@Silica)

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Anderson localization of light: Strong dependence with incident angle

Cited by 1 publication

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Random Lasing at Localization Transition in a Colloidal Suspension (TiO2@Silica)

Random Lasing at Localization Transition in a Colloidal Suspension (TiO2@Silica)

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Random Lasing at Localization Transition in a Colloidal Suspension (TiO₂@Silica)

Random Lasing at Localization Transition in a Colloidal Suspension (TiO₂@Silica)