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The energy gap of zinc-blende epitaxial layers grown by molecular beam epitaxy has been determined over a wide range of composition using optical transmission and reflection and an empirical formula for the energy gap at room temperature is also given. In addition in situ spectroscopic ellipsometry was used in order to determine the temperature dependence of the energy gap between room temperature and the growth temperature of alloys with compositions x, y as used in cladding layers and waveguides for blue - green light-emitting devices.
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Lunz et al. (1997) studied this question.
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