Thin Layer Design of X-Cut Lithium Niobate Electrooptic Modulator With Slotted SiO$_{2}$ Substrate

In this letter, we present a novel lithium niobate (LN) electrooptic modulator. The proposed modulator incorporates a thin layer of LN and a slotted substrate structure that together facilitate velocity and impedance matching. A full-wave analysis of the proposed modulator is undertaken in order to establish the frequency dispersion effects with respect to the devices microwave effective index N
_m
, characteristic impedance Z
_c
, and half-wave voltage length product V
_pi
L.