Kinetics of four-wave mixing for a 2D magneto-plasma in strong magnetic fields

Details Kinetics of four-wave mixing for a 2D magneto-plasma in strong magnetic fields Kinetics of four-wave mixing for a 2D magneto-plasma in strong magnetic fields

1998-08-07

arxiv.org/abs/cond-mat/9808073v1

Phys. Rev. B 58, 13060 (1998)

Physics

Condensed Matter

13 pages, in RevTex format, 10 figures, Phys. Rev B in press

Scientific paper

10.1103/PhysRevB.58.13060

We investigate the femtosecond kinetics of an optically excited 2D magneto-plasma at intermediate and high densities under a strong magnetic field perpendicular to the quantum well (QW). We assume an additional weak lateral confinement which lifts the degeneracy of the Landau levels partially. We calculate the femtosecond dephasing and relaxation kinetics of the laser pulse excited magneto-plasma due to bare Coulomb potential scattering, because screening is under these conditions of minor importance. In particular the time-resolved and time-integrated four-wave mixing (FWM) signals are calculated by taking into account three Landau subbands in both the valance and the conduction band assuming an electron-hole symmetry. The FWM signals exhibit quantum beats mainly with twice the cyclotron frequency. Contrary to general expectations, we find no pronounced slowing down of the dephasing with increasing magnetic field. On the contrary, one obtains a decreasing dephasing time because of the increase of the Coulomb matrix elements and the number of states in a given Landau subband. In the situation when the loss of scattering channels exceeds these increasing effects, one gets a slight increase at the dephasing time. However, details of the strongly modulated scattering kinetics depend sensitively on the detuning, the plasma density, and the spectral pulse width relative to the cyclotron frequency.

Affiliated with

Also associated with

No associations

Rating

Kinetics of four-wave mixing for a 2D magneto-plasma in strong magnetic fields does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Kinetics of four-wave mixing for a 2D magneto-plasma in strong magnetic fields, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Kinetics of four-wave mixing for a 2D magneto-plasma in strong magnetic fields will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-616834