Performance of Modified Silicon-Based Optical Leaky-Wave Antenna Structures

Conventional silicon-based optical leaky-wave antennas (OLWAs) have been investigated in the literature as high directivity narrow-beam radiators with steering capability and designed for 1550 nm operation using single-grating layer. In this paper, two modifications are introduced to the conventional silicon-based OLWA. The first modification is to redesign the structure for 1300 nm operation and to compare the radiation parameters with those of the 1550 nm counterpart. The second modification is to design and investigate the performance of a double-grating OLWA which is useful for double-beam steering.