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Modulation Spectroscopy of Reduced Dimensional Semiconductor Systems

100%

Pollak F. H.

Acta Physica Polonica A

1995

vol. 88

issue 4

581-590

This paper reviews the background of modulation spectroscopy, particularly electromodulation, presents some recent room temperature results having both fundamental and technological significance, including two-dimensional electron gas effects in modulation-doped, pseudomorphic GaAlAs/InGaAs/GaAs single quantum wells (HΕΜΤ structures), quantum well laser structures and process-induced damage in quantum dot arrays fabricated by reactive ion etching.

Contactless Electroreflectance Study of Temperature Dependence of Fundamental Band Gap of ZnSe

39%

Krystek W., Malikova L., Pollak F. H., Tamargo M. C., Dai N., Zeng L., Cavus A.

Acta Physica Polonica A

1995

vol. 88

issue 5

1013-1017

We report a systematic study of the temperature variation of the energy [E_{0}(T)] and broadening parameter [Γ_{0}(T)] of the fundamental band gap of ZnSe in the range 27 K < T < 370 K using contactless electroreflectance. The obtained values of E_{0}(T) and Γ_{0}(T) have been fit to various semi-empirical expressions to obtain information about the exciton-phonon coupling in this system. The experimentally determined E_{0}(T) also is of significance for technological applications since it can be used to determine the operating temperature of ZnSe-based devices such as quantum well lasers.

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2 Acta Physica Polonica A

2 1995

2 Pollak F. H.

1 Cavus A.

1 Dai N.

1 Krystek W.

1 Malikova L.

1 Tamargo M. C.

1 Zeng L.

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Modulation Spectroscopy of Reduced Dimensional Semiconductor Systems

Contactless Electroreflectance Study of Temperature Dependence of Fundamental Band Gap of ZnSe