Download e-book for kindle: Quantum Electronics in Lasers and Masers: Part 2 by P. G. Eliseev (auth.), Academician D. V. Skobel’tsyn (eds.)

By P. G. Eliseev (auth.), Academician D. V. Skobel’tsyn (eds.)

ISBN-10: 1475763395

ISBN-13: 9781475763393

ISBN-10: 1475763417

ISBN-13: 9781475763416

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This case, however, does not have immediate bearing on the physical processes in the p-n junction. The shift of the spectral peak can be characterized by the parameter e+: .. 'p (j) on semilog scale. Generally speaking, the error in the determination of hwp is usually worse than the error in the measurement of hw, and for wide bands of low intensity this difference amounts to an order of magnitude or more. In the in dc measurement interval e+ was usually almost constant (10 to 20% error). 8) where {j is a small temperature-dependent quantity.

No, NA > 2 . 10 18 cm- 3), and the impurity distribution in a typical situation was intermediate between linear and flat, rough estimates of the concentration gradient yielding values of 10 22 to 10 23 cm- 4 and the values of INA - Nnl turning out to be less by a factor of 1/3 to 1/10 than the impurity concentrations far from the p- n junction. Additional heat treatment of the epitaxial diodes tended to diminish the impurity concentration gradient or to make the impurity distribution more nearly linear.

25 Fig. 21. Spontaneous emission spectra of a GaAs diode at 300 0K with nondegenerate filling. The solid curves represent Gaussian functions, and the circles are the experimental points. 165 V. 1nj;ne~ Ollto~ ZIlIl JIlIl T, K 0 Fig. 22. h w (b) in the nondegenerate filling region. Current density 40 A/cm 2• Curve 1 was calculated according to Eq. ELISEEV Turning to the transition region, we note that for kT = £0 the calculations yield arbitrary broadening or, more precisely, the emission bandwidth must become approximately proportional to Emo - F, depending on the excitation level.

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Quantum Electronics in Lasers and Masers: Part 2 by P. G. Eliseev (auth.), Academician D. V. Skobel’tsyn (eds.)


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