[Effect of electric field on optical radiation linewidth of free-carriers in quantum wells].
By using concepts as orbit, momentum and wave packet, the particles which move in a large range of space in solid state are described. According to the uncertainty relations in quantum mechanics, a formula of energy uncertainty of particles is derived. The formula indicates that electric field scatters carriers strongly and makes energy levels broaden largely. Applying the formula to GaAs/GaAlAs quantum wells with P-I-N structure, the calculated optical radiation linewidths are in agreement with measured photoluminescence linewidths.
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Physics Department, Nanchang University, 330047 Nanchang.