Methods and apparatus for phase shifting and modulation of light

摘要

A waveguide comprising a core and at least 2 photonic crystal mirrors is provided which is adapted to modulate light passing therethrough. The modulation may involve charge carrier density variation or carrier depletion in a reversed biased p-n junction. In some embodiments, the junction direction in which the doping changes is vertical. The waveguide is equipped with electrodes adapted to apply a DC voltage and is tunable to achieve a desired propagation constant of the light.