High-efficiency light modulator using guided-to-radiation mode coupling: a proposal

A proper choice of material constants and waveguide structure is discussed to build a high-efficiency light intensity modulator using guided-to-radiation mode coupling through the electrooptic effect. The preferred structure is a 2-D light waveguide such as a LiNbO(3) thin film deposited on a LiTaO(3) substrate, with two planar modulation electrodes.