Two-component nanocavity based on a regular photonic crystal nanobeam

I propose and numerically examine a two-component design of an optical nanocavity. Such a nanocavity consists, first, of a photonic crystal nanobeam, in which the period of the structure is not changed. Second, the cavity contains a piece of additional (supplementary) material with the area of several periods of the photonic crystal. When combining the two components the defect has formed, in which the resonant mode can be excited. The advantages of the proposed model of the cavity has been considered. In particular, the easiness of formation of cavities arrays and of development of dynamic nanophotonic elements. The proposed nanocavity fabrication tolerances have been calculated. It is shown that existing structural layers alignment technologies can be used for fabrication.