Frequency-Dependence of Lattice Attenuation in CdS with Acoustic Domain

概要

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The lattice attenuation factor $\alpha_{1}$ in CdS is studied experimentally by a double-pulse method and theoretically, mainly concentrating on the non-linear effect between various frequency components. The agreement between experiment and theory is very good. Under the strong flux condition ($10^{7}{\sim}18^{8}$ times as large as the thermal level), the frequency dependence of $\alpha_{1}$ in the range between 200 MHz and 2.5 GHz is expressed by $\omega^{1.0}$ deviating largely from the Akhieser $\omega^{2.0}$-law, and in the weak flux case ($10^{6}{\sim}10^{7}$ times), it is approximately by $\omega^{1.8}$ slightly differing from the $\omega^{2.0}$-law. The deviations from $\omega^{2.0}$-law are due to the energy up-conversion from low frequency to high frequency components. The quantitative computer analysis shows that the non-linear effect due to usual lattice anharmonicity is rather important in comparison with effective anharmonicity with electrons (Hutson mechanism), in the above frequency range.
社団法人日本物理学会の論文
1974-11-15