Based on a new metal-wire nano-grating which we suggested recently, a number of optical devices
designs are discussed in this paper. The new metal-wire nano-grating consisted of a series of fine parallel
metallic lines embedded in substrate. The unique property of this embedded grating is that it can be adhered
with other optical elements arbitrarily and can endure any physical and chemical impact on trial due to the
steady homogeneity upper cladding layer. The basic structure of these designs employs four pieces of the
artificial material mentioned above. The two pieces at left side work as PBS. The other two pieces at right side
work as PBC. When we insert one variable LC (liquid crystal) polarization rotator unit between the PBS and
PBC. It could work as an essential 1x2 switch. If the voltage applied on the LC unit is not big enough for 90°
rotation, It could work as an essential 1x2 VPS (variable power splitter). Obviously, when we only deploy one
input and one output, this is an essential VOA (variable optical attenuator). When we insert one interleaver core
between the PBS and PBC, plus two waveplates among the light path, it could works as an interleaver. When
we insert one half waveplate and one Farady rotator, between the PBS and PBC, it could works as a circulator.
We have actually built a prototype of 1x2 VPS (variable power splitter) device, and the performance meets
most of the engineering application requirements.