Power-Dependent Coupling and Fast Switching in Distributed Coupling to ZnO Waveguides

摘要

A 20-fold decrease in the efficiency of prism coupling into low-loss ZnO waveguides was found with increasing incident power at 0.532 micrometer. All-optical switching in the temporal envelope of 10ns laser pulses was interpreted theoretically in terms of an absorptive nonlinearity with a relaxation time much slower than the pulse width. (Reprints)