In-plane integration of quantum cascade lasers with resonant intersubband nonlinearities
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We propose a new design of quantum cascade lasers integrated with resonant intersubband nonlinearities, in which the laser is divided into two separately contacted and biased sections along the cavity length. One section operates as a laser active medium while another section serves as a nonlinear element. We show that such schemes turn out to be surprisingly flexible and efficient in implementing various resonant optical nonlinearities.