Slow Light and Superluminality in Kerr Media without a Pump

Yang, Qiguang; Seo, Jaetae; Tabibi, Bagher; Wang, Hui-Tian

doi:10.1103/physrevlett.95.063902

Cited by 37 publications

(14 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Sub as well as superluminal pulse propagation is demonstrated in this crystal recently [4]- [8]. Slow light is observed in ruby crystal via coherent population oscillation [5].…”

Section: Introductionmentioning

confidence: 94%

Studies on Nonlinear Response of Epitaxial Ruby Thin Film

Kumari

Khare

2014

IEEE J. Quantum Electron.

View full text Add to dashboard Cite

Epitaxial ruby thin film is deposited via pulsed laser deposition technique. The charateristic R-lines in PL spectra confirmed ruby phase in the film. Raman spectra showed C-axis growth of the film. The nonlinear absorption coefficient and nonlinear refractive index of film were found to be β ∼ 5.2 × 10 −5 m/W and n 2 ∼ 3.1 × 10 −5 m 2 /W, respectively. Further, the sub as well as superluminal propagation of 130-ns Gaussian pulse in 3.5-μm-thick PLD ruby thin film is reported in this paper. A delay of 17 ns is observed at film orientation of +45°, whereas pulse advancement of 12 ns is observed at −45°. Pulse broadening and compression are also observed with film rotation.Index Terms-Pulsed laser deposition, thin film, Z-scan, optical delay.

show abstract

“…Sub as well as superluminal pulse propagation is demonstrated in this crystal recently [4]- [8]. Slow light is observed in ruby crystal via coherent population oscillation [5].…”

Section: Introductionmentioning

confidence: 94%

Studies on Nonlinear Response of Epitaxial Ruby Thin Film

Kumari

Khare

2014

IEEE J. Quantum Electron.

View full text Add to dashboard Cite

show abstract

“…There is also a theoretical analysis of the propagation of a pulse with different temporal frequencies. 7 They only predict subluminal light propagation in the ruby, yet the ruby needs a strong focusing beam to exploit the refractive index change, and, furthermore, the laser beam is usually a TEM 00 Gaussian beam and thus exhibits different spatial frequencies. If the intensity of the beam is modulated in time, we may expect a contribution similar to the effect of nondegenerate two-wave coupling [8][9][10][11][12]15 ͑NDTWC͒ that arises from mixing of different spatial frequency components with a dispersive coupling coefficient ⌫ ph because of the limited response rate of the saturable resonant interaction of the ruby.…”

Section: Paraxial Energy Transport Of a Focused Gaussian Beam In Rubymentioning

confidence: 99%

Paraxial energy transport of a focused Gaussian beam in ruby with nondegenerate two-wave couplinglike mechanism

Gao

Zhang

et al. 2008

Applied Physics Letters

View full text Add to dashboard Cite

Paraxial energy transport of an intensity-modulated and focused Gaussian beam is studied in ruby. Deformations of the temporal profiles are observed under different conditions and explained by the interplay among a nondegenerate two-wave couplinglike mechanism, the population oscillations, and the Fraunhofer diffraction. Experimental evidence is provided for the existence of a nondegenerate two-wave couplinglike mechanism. The self-superluminal can be observed under proper conditions. A group velocity of −83m∕s is achieved with a Gaussian-like-modulated pulse of 30ms with background illumination. Based on these results, a method to control the group velocity of a single beam in such media is proposed.

show abstract

“…Together with the slow light, the superluminal pulse propagation was also found [6][7][8][9][10]. The researches are developing very fast on this topic in both theories and experiments [11][12][13][14][15][16][17][18][19][20][21]. Large group velocity delay with easy operation in solid-state medium at the room temperature is the aim of the current research.…”

Section: Introductionmentioning

confidence: 99%

Nonlinear optical properties and superluminal propagation in the ruby

Gao

Zhang

et al. 2010

Chin. Sci. Bull.

View full text Add to dashboard Cite

In this review article, we summarized the study of the weak light nonlinear properties associated with group velocity change in the ruby. The ruby could be reduced to a two-level system, in which population oscillations could lead to a subluminal result. With the modulated TEM 00 beam introduced into the ruby, self-phase modulation together with Fraunhofer diffractions and nondegenerate two-wave coupling between different spatial frequency components of the beam occurs at the same time. Population oscillations, self-phase modulation together with Fraunhofer diffractions and nondegenerate two-wave coupling mechanism competes with each other, which brings a new phenomenon of self-superluminal group velocity propagation in the ruby. group velocity control, nondegenerate two-wave coupling, subluminal, superluminal Citation: Gao F, Xu J J, Zhang G Q, et al. Nonlinear optical properties and superluminal propagation in the ruby.

show abstract

Slow Light and Superluminality in Kerr Media without a Pump

Cited by 37 publications

References 21 publications

Studies on Nonlinear Response of Epitaxial Ruby Thin Film

Studies on Nonlinear Response of Epitaxial Ruby Thin Film

Paraxial energy transport of a focused Gaussian beam in ruby with nondegenerate two-wave couplinglike mechanism

Nonlinear optical properties and superluminal propagation in the ruby

Contact Info

Product

Resources

About