On-chip mode-control in active silicon-based photonic molecule by complete photon confinement

We have demonstrated an efficient way to build on-chip active silicon-based photonic molecules in complete photonic bandgap confinement. Due to the conformal deposition processes on square patterns, the luminescent layers are naturally confined in three-dimensional photonic bandgap materials. The confined optical modes in photonic molecules exhibit very similar energy level structure as in chemical molecules. In this paper, the PMs with two different coupling distances were fabricated. The confined modes are precisely and conveniently controlled by such conformal method. We believe this convenient way will greatly promote the study of complex photonic molecule and the schemes of on-chip integrated photonic circuit structures.