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Slow and fast light in pyramid shaped quantum dots under applied electric fields: The effect of the incident light polarization

E.C. Niculescu

Superlattices and MicrostructuresMar 2, 20156 citations

Comment on “From fast light to slow light in resonantly driven quantum dot systems” [Opt. Commun. 298–299 (2013) 176–179]

Emmanuel Paspalakis

Optics CommunicationsJan 23, 20148 citations

Effect of quantum dot shape on dynamical dephasing suppression in exciton qubits under applied electric field

Thomas E. Hodgson, Lorenza Viola, Irene D’Amico

Microelectronics JournalJul 28, 20080 citations

Effect of incident light polarization on optical properties of an ellipsoidal quantum dot

Ebrahim Sadeghi, S. Alirezaie

Superlattices and MicrostructuresDec 5, 201222 citations

Simultaneous slow and fast light involving the Faraday effect

B. Macke, Bernard Ségard

We theoretically study the linear transmission of linearly polarized light pulses in an ensemble of cold atoms submitted to a static magnetic field parallel to the direction of propagation. The carrier frequency of the incident pulses coincides with a resonance frequency of the atoms. The transmitted light, the electric field of which is transversal, is examined in the polarizations parallel and perpendicular to that of the incident pulses. We give explicit analytic expressions for the transfer functions of the system for both polarizations and for the corresponding group delays. We demonstrate that slow light can be observed in a polarization, whereas fast light is simultaneously observed in the perpendicular polarization. Moreover, we point out that, due to the polarization postselection, the system is not necessarily minimum phase shift. Slow light can then be obtained in situations where an irrelevant application of the Kramers-Kronig relations could lead one to expect fast light. When the incident light is step modulated, we finally show that, in suitable conditions, the system enables one to separate optical precursor and main field.We theoretically study the linear transmission of linearly polarized light pulses in an ensemble of cold atoms submitted to a static magnetic field parallel to the direction of propagation. The carrier frequency of the incident pulses coincides with a resonance frequency of the atoms. The transmitted light, the electric field of which is transversal, is examined in the polarizations parallel and perpendicular to that of the incident pulses. We give explicit analytic expressions for the transfer functions of the system for both polarizations and for the corresponding group delays. We demonstrate that slow light can be observed in a polarization, whereas fast light is simultaneously observed in the perpendicular polarization. Moreover, we point out that, due to the polarization postselection, the system is not necessarily minimum phase shift. Slow light can then be obtained in situations where an irrelevant application of the Kramers-Kronig relations could lead one to expect fast light. When the incident light is step modulated, we finally show that, in suitable conditions, the system enables one to separate optical precursor and main field.

arXiv:1606.00736Physical Review AOct 3, 20167 citations

Optical non-linearities associated to hydrogenic impurities in InAs/GaAs self-assembled quantum dots under applied electric fields

M. Cristea, E.C. Niculescu, Cristina Truşcǎ

The effects of the hydrogenic impurity on the electron-related non-linear optical processes in a InAs/GaAs dome-shaped quantum dot with a wetting layer under applied electric fields are studied within the density-matrix formalism. The one-electron energy levels and wave functions are calculated using the effective mass approximation and the finite element method. The non-linear optical absorption, relative refractive index change and non-linear optical rectification associated with interlevel transitions are calculated under a strong probe field excitation for both in-plane and z-polarisation of the incident light. According to our results as the electric field increases the absorption and dispersion peaks decrease and exhibit red shift. Hydrogenic impurity located at the origin induces a blue shift in the optical responses. For the optical absorption coefficient the peaks magnitude is enhanced by the impurity presence independent of the electric field strengths, whereas the non-linear optical rectification is larger in the case with impurity only for zero applied electric field.The effects of the hydrogenic impurity on the electron-related non-linear optical processes in a InAs/GaAs dome-shaped quantum dot with a wetting layer under applied electric fields are studied within the density-matrix formalism. The one-electron energy levels and wave functions are calculated using the effective mass approximation and the finite element method. The non-linear optical absorption, relative refractive index change and non-linear optical rectification associated with interlevel transitions are calculated under a strong probe field excitation for both in-plane and z-polarisation of the incident light. According to our results as the electric field increases the absorption and dispersion peaks decrease and exhibit red shift. Hydrogenic impurity located at the origin induces a blue shift in the optical responses. For the optical absorption coefficient the peaks magnitude is enhanced by the impurity presence independent of the electric field strengths, whereas the non-linear optical rectification is larger in the case with impurity only for zero applied electric field.

The Philosophical Magazine A Journal of Theoretical Experimental and Applied PhysicsSep 28, 20173 citations

Errata and comments on the paper “Slow and fast light in pyramid shaped quantum dots under applied electric fields: The effect of the incident light polarization” [Superlatt. Microstruct. 82 (2015) 313–326]

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Errata and comments on the paper “Slow and fast light in pyramid shaped quantum dots under applied electric fields: The effect of the incident light polarization” [Superlatt. Microstruct. 82 (2015) 313–326]

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