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METHOD OF DETERMINING AMPLITUDE OF NANOVIBRATIONS FROM SPECTRUM OF FREQUENCY-MODULATED SEMICONDUCTOR LASER AUTODYNE
METHOD OF DETERMINING AMPLITUDE OF NANOVIBRATIONS FROM SPECTRUM OF FREQUENCY-MODULATED SEMICONDUCTOR LASER AUTODYNE
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机译：从频率调制半导体激光自旋谱确定纳米振动幅度的方法
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摘要
FIELD: physics.;SUBSTANCE: method comprises illuminating an object vibrating at frequency Ω with laser radiation; converting radiation reflected from the object into an electric autodyne signal, decomposing the signal into a spectral series, wherein laser radiation with frequency ω0 is modulated with frequency Ω, which is equal to the oscillation frequency of the object; matching the initial phases of oscillations of the object and modulation frequency of the laser; measuring the amplitude of the second C2 and fourth C4 harmonic of the spectrum of the autodyne signal; using the relationship C2/C4(σ) to calculate the value of the argument of a first order Bessel function σ; illuminating a non-vibrating object with the modulated laser radiation; measuring the value of the amplitude of the second C2cal and fourth C4cal harmonic of the spectrum of the reflected autodyne signal; using the relationship C2cal/C4cal(σM) to calculate the value of the argument of a first order Bessel function σM; calculating the amplitude of nanovibrations ξ using a certain mathematical expression.;EFFECT: high accuracy of determining amplitude of nanovibrations.;9 dwg
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机译：领域：物理：方法包括用激光辐射照射以频率Ω振动的物体;将物体反射的辐射转换成电自达因信号，将其分解成光谱序列，其中频率为ω 0 的激光辐射被调制为频率Ω，该频率等于物体的振荡频率;使物体振荡的初始相位与激光器的调制频率相匹配;测量自达因信号频谱的二次C 2 和二次C 4 的幅度;使用关系C 2 / C 4 （σ）计算一阶贝塞尔函数σ的自变量值;用调制的激光辐射照亮非振动的物体;测量反射的自达因信号的频谱的第二C 2cal 和第四C 4cal 振幅的值;使用关系C 2cal / C 4cal （σ M ）计算一阶贝塞尔函数σ的自变量值M ;使用一定的数学表达式计算纳米振动ξ的幅度;效果：确定纳米振动幅度的高精度; 9 dwg
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