A semiconductor hollow optical waveguide (SHOW-ODR) device. The semiconductor hollow optical waveguide device comprises a bottom substrate having a trench within, a first omni-directional reflector conformal located on the bottom substrate, and a top substrate having a second omni-directional reflector and located on the bottom substrate with the second omni-directional reflector in contact with the first omni-directional reflector. In addition, a portion of the first omni-directional reflector in the trench and a portion of the second omni-directional reflector over the trench together form an air channel.