Optical analogue of electronic Bloch oscillations.
We report on the observation of Bloch oscillations in light transport through periodic dielectric systems. By introducing a linear refractive index gradient along the propagation direction the optical equivalent of a Wannier-Stark ladder was obtained. Bloch oscillations were observed as time-resolved oscillations in transmission, in direct analogy to electronic Bloch oscillations in conducting crystals where the Wannier-Stark ladder is obtained via an external electric field. The observed oscillatory behavior is in excellent agreement with transfer matrix calculations.
Sapienza
Riccardo
R
European Laboratory for Nonlinear Spectroscopy and INFM, 50019 Sesto Fiorentino (Florence), Italy.
Costantino
Paola
P
Wiersma
Diederik
D
Ghulinyan
Mher
M
Oton
Claudio J
CJ
Pavesi
Lorenzo
L