ON THE THEORY OF TWO-PHOTON INTERSUBBAND ABSORPTION AND LINEARCIRCULAR DICHROISM IN SEMICONDUCTORS OF THE A3B5 TYPE
Rasulov R.Y. Rasulov V.R. Kasimov F.U. Nasirov M.K. Farmanov I.E. Tursinbaev A.Z.
9 June 2025V N Karazin Kharkiv National University
East European Journal of Physics
2025#2025Issue 2188 - 199 pp.
The frequency-temperature dependences of the probability of two-photon absorption (2PA), caused by transitions from the branch of light holes to the subband of spin-orbit splitting and linear-circular dichroism (LCD) associated with 2PA, as well as the coefficient of two-photon light absorption in GaAs and InAs, where the contribution to the absorption of the effect of coherent saturation. The role of various types of transitions, differing from each other in virtual states and participating in the 2PT, is analyzed. In GaAs and InAs, the presence of several peaks in the frequency-temperature dependences of the 2PA coefficient was revealed; the appearance of the peaks is explained not only by a specific change in the distribution functions of photoexcited holes, but also by the fact that at certain frequency values, some denominators in the expressions of the composite matrix elements tend to zero.
Coherent saturation effect , Multiphoton optical transitions , Semiconductor , Two-photon absorption coefficient , Two-photon optical transitions , Virtual states
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Fergana State University, Fergana, Uzbekistan
Andijan State University, Andijan, Uzbekistan
Fergana State Technical University, Fergana, Uzbekistan
South Kazakhstan University of Muktar Auezov, Shymkent, Kazakhstan
Fergana State University
Andijan State University
Fergana State Technical University
South Kazakhstan University of Muktar Auezov
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