Journal ArticleDOI
Highly efficient four-wave mixing in double- Λ system in ultraslow propagation regime
Ying Wu,Ying Wu,Xiaoxue Yang +2 more
TLDR
In this article, a time-dependent analysis of four-wave mixing in an ultraslow-propagation regime was performed and the authors obtained the analytical expressions of pulsed probe laser, FWM-generated pulse, phase shifts and absorption coefficients, group velocities, and FWM efficiency.Abstract:
We perform a time-dependent analysis of four-wave mixing (FWM) in a double-$\ensuremath{\Lambda}$ system in an ultraslow-propagation regime and obtain the analytical expressions of pulsed probe laser, FWM-generated pulse, phase shifts and absorption coefficients, group velocities, and FWM efficiency. With these analytical expressions, we show that an efficiently generated FWM field can acquire the same ultraslow group velocity $({V}_{g}∕c\ensuremath{\sim}{10}^{\ensuremath{-}4}--{10}^{\ensuremath{-}5})$ and pulse shape of a probe pump and that the maximum FWM efficiency is greater than 25%, which is orders of magnitude larger than previous FWM schemes in the ultraslow-propagation regime.read more
Citations
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Analogue of double-$\Lambda$-type atomic medium and vector dromions in a plasmonic metamaterial
TL;DR: In this article, an array of the meta-atom consisting of two cut-wires and a split-ring resonator interacting with an electromagnetic field with two polarization components was considered, and it was shown that the system can be taken as a classical analogue of an atomic medium with a double-Lambda$-type four-level configuration coupled with four laser fields, exhibits an effect of plasmon induced transparency (PIT), and displays a similar behavior of atomic four-wave mixing (FWM).
Journal ArticleDOI
High efficiency four-wave mixing in double asymmetry quantum dots
TL;DR: In this paper, a theory analysis of the four-wave mixing (FWM) scheme in a double asymmetry quantum dots (QDs) system is performed, where the efficiency of the generated field decreases in an oscillating mode for the penetration depth and is significantly enhanced because of three-wave mixed (TWM).
Journal ArticleDOI
Optical bistability in a negative refractive index media using the electron tunneling effect
TL;DR: In this article , the defect layer of a defect one-dimensional photonic crystal (1DPC) is doped with double quantum dot (DQD) nanostructure which interacts with an indirect incoherent pump and a susceptible probe incident light, respectively.
Journal ArticleDOI
Enhanced refractive index without absorption via both coherent and incoherent fields in a semiconductor quantum well
TL;DR: In this paper, the authors investigated the absorptive and dispersive properties of a weak probe field in a ladder-type semiconductor quantum well and found that the enhanced positive or negative refraction index without absorption can be easily obtained in this solid-state system.
Journal ArticleDOI
Continuous-Variable Entanglement Generation from a Four-State Atom under Raman Excitation
TL;DR: In this article, the authors investigated the generation and evolution of continuous variable entanglement from a laser-driven four-state atom inside a doubly resonant cavity under Raman excitation.
References
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Giant Kerr nonlinearities obtained by electromagnetically induced transparency.
Holger Schmidt,Atac Imamoglu +1 more
TL;DR: A cross-phase modulation scheme that exhibits a giant, resonantly enhanced nonlinearity, along with vanishing linear susceptibilities, is analyzed and has possible applications in quantum nondemolition measurements and for quantum logic gates.
Journal ArticleDOI
Nonlinear Optics at Low Light Levels
TL;DR: In this article, the combination of electromagnetically induced transparency based nonlinear optics and cold atom technology, under conditions of ultra-low light propagation, allows nonlinear processes at energies of a few photons per atomic cross section.
Journal ArticleDOI
Photon Switching by Quantum Interference
TL;DR: In this article, the authors describe a four-state atomic system that absorbs two photons, but does not absorb one photon, but operates at an energy cost of one photon per switching event.