NONLINEAR SPECTROSCOPY OF NARROW-GAP PR-BA-CU-O SEMICONDUCTOR-FILMS WITH THE AID OF BIHARMONIC PUMP

Zherikhin, A.N.; Lobastov, V.A.; Petnikova, V.M.; Shuvalov, V.V.

Авторы: Zherikhin A.N., Lobastov V.A., Petnikova V.M., Shuvalov V.V.
Журнал: KVANTOVAYA ELEKTRONIKA
Том: 21
Номер: 6
Год издания: 1994
Первая страница: 574
Последняя страница: 576
DOI: 10.1070/QE1994v024n06ABEH000131
Аннотация: The dependences of the efficiency eta of self-diffraction of picosecond pulses on their frequency offset OMEGA were determined for Pr-Ba-Cu-O semiconductor films. These dependences were similar to those already reported (for Ni and Y-Ba-Cu-O in the resistive phase) and had a central peak (eta approximately 10(-7) for Absolute value of OMEGA less-than-or-equal-to 10 cm-1) and wide wings (eta approximately 10(-9) for Absolute value of OMEGA greater-than-or-equal-to 10 cm-1) with a jagged profile because of phonon resonances. An analysis was made of the causes of this similarity, of the asymmetry of eta (OMEGA) relative to the sign of OMEGA, and of temperature singularities. Although the position of a combination electron resonance (interband transition edge) of Pr-Ba-Cu-O was within the range of variation of OMEGA, its identification was complicated by the presence of nearby (on the scale of OMEGA) phonon modes.The dependences of the efficiency η of self-diffraction of picosecond pulses on their frequency detuning Ω were determined for Pr—Ba—Cu—O semiconductor films. These dependences were similar to those already reported (for Ni and Y—Ba—Cu—O in the resistive phase) and had a central peak (η ~ 10-7 for ≤ 10 cm-1) and wide wings (η ~ 10-9 for ≥ 10 cm-1) with a jagged profile because of phonon resonances. An analysis was made of the causes of this similarity, of the asymmetry of η(Ω) relative to the sign of η, and of specific temperature effects. Although the position of a combination electron resonance (interband transition edge) of Pr—Ba—Cu—O was within the range of variation of η, its identification was complicated by the presence of nearby (on the scale of Ω) phonon modes.
Добавил в систему: Шувалов Владимир Владимирович

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NONLINEAR SPECTROSCOPY OF NARROW-GAP PR-BA-CU-O SEMICONDUCTOR-FILMS WITH THE AID OF BIHARMONIC PUMPстатья

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