Optical properties of semiconductors under strong pumping in the M-band region and two-photon probing of the biexciton state

10.1007/s11449-008-1014-0

“…where τ 0 is the characteristic time of the film response to an external field [1][2][3][4][5][6][7][13][14][15][16][17]. Thus, we normalize the fields to the characteristic field E c and the biexciton density n bi = |b| 2 to the characteristic density n c = /(αg) 2 .…”

“…It is known [8,9] that this process is characterized by a gigantic oscillator strength. The mechanism of two-photon excitation of biexcitons was previously used in considering the phenomena of self-induced transparency and optical nutation [9], self-reflection [10], self-pulsation in a ring cavity [11], nonlinear transmission of a thin film under the two-photon optical exciton-biexciton conversion [6], and in the experimental [12] and theoretical [13,14] studies of the Autler-Townes effect on biexcitons.…”

Optical properties of semiconductors in exciton range of spectrum in non-stationary regime taking into account the exciton-exciton interaction

“…The kinetics of the radiative recombination of biexcitons, the nonlinear response of the system of excitons and biexcitons [1][2][3], the red and blue shifts of exciton bands at the picosecond pumping [4][5][6] , the Autler-Townes effect on the biexcitons in the crystals CuCl [7][8][9][10] were investigated by the use the pump-probe method. In theoretical investigations [8][9][10][11][12][13][14] the different aspects of the pump-probe method were considered for the high density system of excitons and biexcitons. The dielectric susceptibilities were investigated in the crystal like CuCl in the case, when the strong pump pulse acts in the region of M-band of luminescence and testing was made by two-photon light absorption with the biexciton excitation [8,9].…”

“…In theoretical investigations [8][9][10][11][12][13][14] the different aspects of the pump-probe method were considered for the high density system of excitons and biexcitons. The dielectric susceptibilities were investigated in the crystal like CuCl in the case, when the strong pump pulse acts in the region of M-band of luminescence and testing was made by two-photon light absorption with the biexciton excitation [8,9]. It was investigated in [14] the mechanism, when both pulses (pump and probe) act in the exciton region of spectrum taking into account the elastic exciton-exciton interaction.…”

Nonlinear transmission and reflection of ultrashort laser pulses by a thin semiconductor film under two-photon generation of biexcitons

“…It is well known that as the excitons themselves are the essential characteristic feature of semiconductor optics [14][15][16][17][18][19][20][21][22][23], the biexciton contribution may be very important in nonlinear optical phenomena in the frequency range close to the intrinsic absorption threshold. The process of resonant two-photon excitation of biexcitons was studied experimentally in [24] and was taken into account while investigating the phenomena of self-induced transparency and optical nutation [25], self-reflection [26], self-pulsations in a ring cavity [27], and nonlinear transmission by a thin film in two-photon optical exciton-biexciton conversion [10], and in experimental [28] and theoretical [21,22,[29][30][31][32] investigation of the Autler-Townes effect in biexcitons, and lasing [33,34].…”