Fig. 1: Quasi-2D OMC cavity design.
From: Two-dimensional optomechanical crystal cavity with high quantum cooperativity
a Unit cell schematic of a linear waveguide formed in the snowflake crystal. Guided modes of the waveguide propagate along the x-axis. Insets: (left) “C”-shaped parameters; (right) snowflake parameters. b Photonic and c phononic bandstructure of the linear waveguide. The solid blue curves are waveguide bands of interest; dashed lines are other guided modes; shaded light blue regions are bandgaps of interest; green tick mark indicates the cavity mode frequencies; gray regions denote the continua of propagating modes. In the photonic bandstructure, only modes of even vector parity about the center of the Si slab (σz = +1) are shown. In the acoustic bandstructure, green dashed curves are for σz = +1 and σy = −1 parity modes, and yellow dashed curves denote σz = −1 modes. d FEM-simulated mode profile (Ey component of the electric field) of the fundamental optical cavity resonance at ωc/2π = 194 THz, with red (blue) corresponding to positive (negative) field amplitude. e Simulated displacement profile of the fundamental acoustic cavity resonance at ωc/2π = 10.27 GHz. The magnitude of displacement is represented by color (large displacement in red, zero displacement in blue).
