Patent ID: 7643714

Claim:
An electro-optical modulator, comprising: a substrate having an insulating surface; a high index contrast slot waveguide adjacent said insulating surface, said high index contrast slot waveguide having at least two stripes defining said slot; a cladding adjacent said high index contrast slot waveguide, said cladding comprising a material that exhibits an enhanced nonlinear optical coefficient, at least some of said cladding being situated with said slot; an optical input of said electro-optical modulator configured to receive an optical signal as input; an optical output of said electro-optical modulator configured to provide a modulated optical signal as output; and an electrical signal source configured to apply a modulation signal to said high index contrast slot waveguide; said high index contrast slot waveguide and said cladding configured so that the responsivity is less than 1 volt-centimeter.