Tunable photonic Bloch oscillations in electrically modulated photonic crystals

Details Tunable photonic Bloch oscillations in electrically modulated photonic crystals Tunable photonic Bloch oscillations in electrically modulated photonic crystals

2008-10-17

arxiv.org/abs/0810.3049v1

Optics Letters, Vol. 33, 2200 (2008)

Physics

Optics

Scientific paper

10.1364/OL.33.002200

We exploit theoretically the occurrence and tunability of photonic Bloch oscillations (PBOs) in one-dimensional photonic crystals (PCs) containing nonlinear composites. Because of the enhanced third-order nonlinearity (Kerr type nonlinearity) of composites, photons undergo oscillations inside tilted photonic bands, which are achieved by the application of graded external pump electric fields on such PCs, varying along the direction perpendicular to the surface of layers. The tunability of PBOs (including amplitude and period) is readily achieved by changing the field gradient. With an appropriate graded pump AC or DC electric field, terahertz PBOs can appear and cover a terahertz band in electromagnetic spectrum.

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