Ultra high Q one dimensional hybrid PhC SPP waveguide microcavity with large structure tolerance
Abstract A photonic crystal surface plasmon polaritons hybrid transverse magnetic mode waveguide based on a one dimensional optical microcavity is designed to work in the communication band. A Gaussian field distribution in a stepping heterojunction taper is designed by band engineering, and a silica layer compresses the mode field to the subwavelength scale. The designed microcavity possesses a resonant mode with a quality factor of 1609 and a modal volume of 0.01 cubic wavelength. The constant period and the large structure tolerance make it realizable by current processing techniques.