An optical device is disclosed which comprises a base including a lower cylindrical base member having a common central line and a first diameter and having top and bottom surfaces, a first electrode layer formed on the top surface of the lower base member, a dielectric layer formed on t
An optical device is disclosed which comprises a base including a lower cylindrical base member having a common central line and a first diameter and having top and bottom surfaces, a first electrode layer formed on the top surface of the lower base member, a dielectric layer formed on t