New nonlinear optical effect: self reflection phenomenon due to exciton-biexciton-light interaction in semiconductors

摘要

The characteristic peculiarities of the self―reflection of a strong electromagnetic wave in a system of coherent excitons and biexcitons due to the exciton―photon interaction and optical exciton―biexciton conversion in semiconductors were investigated as one of the manifestations of nonlinear optical Stark―effect. It was found that a monotonously decreasing standing wave with an exponential decreasing spatial tail is formed in the semiconductor. Under the action of the field of a strong pulse, an optically homogeneous medium is converted into the medium with distributed feedback. The appearance of the spatially separated narrow pears of the reflective index, extinction and reflection coefficients is predicted.