  We have studied CR lineshape of terahertz-light-induced current in InAs
quantum wells in tilted quantizing magnetic fields. We have observed dramatic
modification of the lineshape with increasing of in-plane component of magnetic
field as well as with increasing of transverse built-in electric field in the
well. Scenario of the modification shows that the energy spectrum asymmetry is
determined by so-called toroidal moment of the system and is a function of
Landau quantum number. Macroscopic self-organization of electrons under the
conditions of quantum Hall effect has also been directly demonstrated in both
linear and saturation regimes of the light absorption.
