title: Optical Bloch oscillations in waveguide arrays.
abstract: We show that optical Bloch oscillations can emerge in waveguide arrays with linearly varying propagation constants. The existence of localized modes (Wannier-Stark states) with equidistant wave-number spacing (Wannier-Stark ladder) that do not undergo diffraction is analytically proved. The evolution of arbitrary initial excitations is described, and potential applications are suggested.
authors: U
authors: U
authors: Peschel
authors: T
authors: T
authors: Pertsch
authors: F
authors: F
authors: Lederer