Delay and distortion of slow light pulses by excitons in ZnO

Shubina, T. V.; Glazov, M. M.; Gippius, N. A.; Торопов, А. А.; Lagarde, Delphine; Disseix, P.; Leymarie, J.; Gil, Bernard; Pozina, Galia; Bergman, J. P.; Ḿonemar, B.

doi:10.1103/physrevb.84.075202

Cited by 16 publications

(17 citation statements)

References 27 publications

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“…The combination of Faraday effect and non-reciprocal birefringence leads to a shift of the angle for maximum conversion due to the second term of Eq. (25). This is in full accord with the experimental data presented in Fig.…”

Section: Circular Versus Linear Birefringencesupporting

confidence: 92%

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Magnetic field induced nutation of exciton-polariton polarization in (Cd,Zn)Te crystals

et al. 2013

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We study the polarization dynamics of exciton-polaritons propagating in sub-mm thick (Cd,Zn)Te bulk crystals using polarimetric time-of-flight techniques. The application of a magnetic field in Faraday geometry leads to synchronous temporal oscillations of all Stokes parameters of an initially linearly or circularly polarized, spectrally broad optical pulse of 150 fs duration propagating through the crystal. Strong dispersion for photon energies close to the exciton resonance leads to stretching of the optical pulse to a duration of 200−300 ps and enhancement of magneto-optical effects such as the Faraday rotation and the non-reciprocal birefringence. The oscillation frequency of the excitonpolariton polarization increases with magnetic field B, reaching 10 GHz at B ∼ 5 T. Surprisingly, the relative contributions of Faraday rotation and non-reciprocal birefringence undergo strong changes with photon energy, which is attributed to a non-trivial spectral dependence of Faraday rotation in the vicinity of the exciton resonance. This leads to polarization nutation of the transmitted optical pulse in the time domain. The results are well explained by a model that accounts for Faraday rotation and magneto-spatial dispersion in zinc-blende crystals. We evaluate the exciton g-factor |gexc| = 0.2 and the magneto-spatial constant V = 5 × 10 −12 eVcmT −1 .

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Section: Circular Versus Linear Birefringencesupporting

confidence: 92%

“…This is due to circular dichroism which is not accounted for in Eq. (25). Nevertheless, in case of pure nonreciprocal birefringence (δ = 15.2 meV) the dichroism can be neglected.…”

Section: Circular Versus Linear Birefringencementioning

confidence: 99%

Magnetic field induced nutation of exciton-polariton polarization in (Cd,Zn)Te crystals

et al. 2013

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“…The spectrum of pulses was assumed to be Gaussian with the central frequency : (7) It was accepted that the amplitude of the incident pulse is maximal at the time . In the linear regime, the electric field of the transmitted pulse is determined as [6,13] Figure 2 shows the dispersion laws for structures of various designs at different detunings. The dashed line is the dispersion law of light for a type-А structure without exciton ( ) in the case of coinciding refractive indices, i.e., .…”

Section: Optics and Laser Physicsmentioning

confidence: 99%

“…At the same time, an efficient slowing down of light can be achieved near exciton resonances [6]. In view of this circumstance, structures in which exciton and Bragg resonances occur at close frequencies seem particular promising.…”

Section: Introductionmentioning

confidence: 99%

Slow light in resonant photonic crystals with a complex unit cell

2017

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Features of the propagation and slowing down of short light pulses (duration of ~0.1-2 ps) in one-dimensional resonant photonic crystals with various types of unit cells containing several quantum wells are discussed. It is established that the use of structures with a complex unit cell makes it possible to reduce the group velocity of exciton-polaritons along with the conservation of the width of the transparency window. The calculations show the possibility of the slowing down of a light pulse by a factor of 50 as compared to a pulse propagating in vacuum. The predicted delay time of the pulse is 2 ps at a damping of only 3-5 times.

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“…Refs. [5,6]) etc. There are a number of theoretical and practical problems connected with fabrication of polaritonic crystals [7,8], which present a particular type of photonic crystals [9] featured by a strong coupling between the medium quantum excitations (excitons) and the optical field.…”

Section: Introductionmentioning

confidence: 97%