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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Journal ArticleDOI
Theoretical Investigation of Lasing without Inversion in a Multiple Quantum Well System
TL;DR: In this paper, the influence of exciton spins relaxation on spatial evolution of amplification without population inversion in a four-level GsAs multiple quantum wells is discussed theoretically, and the role of propagation distance on absorption, dispersion and group index of weak probe light in the presence and absence of ESR is analyzed.
Journal ArticleDOI
Coherent Control of Absorption Resonances via Antirotating Coupling
TL;DR: In this paper, the effects of the antirotating coupling on the absorption resonances are presented for a microwave driven three-level system, and it is shown that nonlinear sideband generation, selective suppression and switching between peaks and dips in the absorption spectrum are obtained as the microwave Rabi frequency is varied.
Journal ArticleDOI
Ultraslow optical solitons in tunnel-coupled double semiconductor quantum well ∗
TL;DR: In this paper, the nonlinear evolution of the probe field in an asymmetric coupled-quantum well driven coherently by a pulse probe field and two controlled fields is investigated.
Journal ArticleDOI
Spatial vortex four-wave mixing in a five-level atomic system
TL;DR: In this paper, a scheme for modulating the spatial vortex four-wave mixing (FWM) in a five-level atomic system was proposed, where the FWM field can be easily manipulated by adjusting the corresponding parameters.
Journal ArticleDOI
Coexisting Brillouin, Rayleigh, and Raman-enhanced four-wave mixings
Yan Zhao,Zhiqiang Nie,Yanpeng Zhang,Changbiao Li,Chenzhi Yuan,Xiaoning Li,Ruimin Wang,Keqing Lu,Chenli Gan +8 more
TL;DR: The coexisting Rayleigh and Brillouin attosecond sum-frequency polarization beats (ASPBs) and the coexisting Raman and Rayleigh ASPBs have also been investigated via homodyne and heterodyne detections, respectively as mentioned in this paper.
References
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Journal ArticleDOI
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.