Enhancement of Kerr nonlinearity completely without absorption

Hong, Liang; Niu, Yueping; Deng, Li; Gong, Shangqing

doi:10.1016/j.physleta.2017.10.048

Cited by 19 publications

(11 citation statements)

References 36 publications

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“…Then by using the method in References [26,27], the cross-Kerr nonlinearity (cross phase modulation) effect induced by tunneling Ti (Ωp<Ti<Tn false(n≠ifalse)) on the probe field can be given as:χTifalse(1false)=−1Γ1−true∑n=2,n≠iNTn2Γn, χTifalse(3false)=−1Γi(Γ1−true∑n=2,n≠iNTn2Γn)2.…”

Section: Models and Equationsmentioning

confidence: 99%

“…Electromagnetically-induced transparency (EIT), which is based on laser-induced atomic coherence, plays an important role in the interaction between light and matter [16,17,18]. With the help of EIT, Kerr nonlinearity can be greatly enhanced, and at the same time, the linear absorption can be suppressed [19,20,21,22,23,24,25,26,27], leading to the study of nonlinear optics at low light levels in EIT systems [28,29,30]. In addition, fifth-order nonlinearity has been studied in various mediums [31,32,33,34,35,36,37].…”

Section: Introductionmentioning

confidence: 99%

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Enhancing Third- and Fifth-Order Nonlinearity via Tunneling in Multiple Quantum Dots

et al. 2019

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The nonlinearity of semiconductor quantum dots under the condition of low light levels has many important applications. In this study, linear absorption, self-Kerr nonlinearity, fifth-order nonlinearity and cross-Kerr nonlinearity of multiple quantum dots, which are coupled by multiple tunneling, are investigated by using the probability amplitude method. It is found that the linear and nonlinear properties of multiple quantum dots can be modified by the tunneling intensity and energy splitting of the system. Most importantly, it is possible to realize enhanced self-Kerr nonlinearity, fifth-order nonlinearity and cross-Kerr nonlinearity with low linear absorption by choosing suitable parameters for the multiple quantum dots. These results have many potential applications in nonlinear optics and quantum information devices using semiconductor quantum dots.

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Section: Models and Equationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Enhancing Third- and Fifth-Order Nonlinearity via Tunneling in Multiple Quantum Dots

et al. 2019

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“…Kerr nonlinear enhancement based on the EIT effect has been widely studied both experimentally and theoretically [23][24][25][26][27][28][29][30][31][32][33][34]. One of the pioneering works in this field was proposed by Schmidt and Imamoglu in 1996 [23].…”

Section: Introductionmentioning

confidence: 99%

Controllable Kerr Nonlinearity in a Degenerate V-Type Inhomogeneously Broadening Atomic Medium Aided By a Magnetic Field

Dong

Doan

Tuan

2021

Preprint

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We propose a degenerate V-type inhomogeneously broadening atomic model for Kerr nonlinear control under the support of an external magnetic field. The magnetic field is used as a control knob to convert the medium from transparency to absorption at the resonance center. It is shown that the magnitude and sign of the Kerr nonlinearity index are manipulated by the magnetic field. Especially, we can easily convert the Kerr nonlinearity index from the positive peak into a negative peak, and from zero value can be transferred to enhanced positive or negative peaks simply only by changing the direction or strength of the magnetic field. In addition, the Kerr nonlinearity index under the influence of the temperature, the intensity, and detuning of the control field is also considered. The proposed model can be useful for applications in optical switching and nonlinear optical devices as well as possible experimental implementations.

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“…EIT is an effect of quantum interference that modifies the optical property of an atomic medium for a weak probe field in presence of another strong coupling field [1]. The fascinating applications of EIT includes slow light propagation [2][3][4], optical switching [5,6], precise atomic clocks [7], tight laser frequency locking [8,9], precise measurement of optical frequency [10], non-linear optical process [11,12], etc. The basic atomic systems that can exhibit EIT effect are Λ- [13][14][15][16], ladder- [17][18][19] and vee-system [20,21].…”

Section: Introductionmentioning

confidence: 99%

Observation of dual electromagnetically induced transparencies in cold $^{87}Rb$ atoms

Mishra,

Chakraborty,

Ram

et al. 2019

Preprint

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We have observed two dual electromagnetically induced transparency (EIT) spectra in probe transmission through cold 87 Rb atoms trapped in a magneto-optical trap (MOT). These dual EIT peaks are generated in two different N-systems formed by probe, coupling and control beams interacting with different levels in D2 line transitions of 87 Rb atom. The dependence of spectral features of two N-systems on driving beams (i.e. coupling and control beams) strength and detuning has been investigated. The results show that the dual EIT spectral features in both the N-systems can be manipulated by varying the strength and detuning of both the driving beams. The two Nsystems have been modelled theoretically using a density matrix formalism and results have shown a reasonable agreement with the experimental observations.

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Enhancement of Kerr nonlinearity completely without absorption

Cited by 19 publications

References 36 publications

Enhancing Third- and Fifth-Order Nonlinearity via Tunneling in Multiple Quantum Dots

Enhancing Third- and Fifth-Order Nonlinearity via Tunneling in Multiple Quantum Dots

Controllable Kerr Nonlinearity in a Degenerate V-Type Inhomogeneously Broadening Atomic Medium Aided By a Magnetic Field

Observation of dual electromagnetically induced transparencies in cold $^{87}Rb$ atoms

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