Patent ID: 8195011

Claim:
An electro-optical modulator for modulating incoming light having a certain wavelength range comprising: a waveguide layer accommodating at least one resonator having a periodic complex refraction index distribution structure defining a periodic defect band-gap and band-edge, a cladding layer, and at least one electrode; said waveguide layer, said cladding layer and said electrode forming a capacitor structure; such that when an external voltage is applied to said capacitor structure the free carrier concentration in the waveguide layer is controlled, enabling a modulation of the resonator's refractive index; wherein said periodic defect band-edge is selected to be within said wavelength range and a period of said periodic refraction index distribution structure is adjusted such that the periodic defect band-gap matches an operation wavelength of said incoming light thereby enabling a slow-light propagation of said incoming light within said waveguide layer.