Slow Light Devices and Their Applications to Microwaves and Photonics

Recently developed, highly effective technologies enabling slow light propagation as a tunable feature in photonic devices, are reviewed. Several applications in ICT are also demonstrated. Controlling the group velocity of light offers a broadband solution to a necessary functionality in microwave and millimeter wave systems: a tunable time-delay/phase-shift line. Moreover, slow light can highly enhance the nonlinearity, thus opening the way to on chip, nonlinear photonics.