Enhancing the waveguide-resonator optical force with an all-optical on-chip analog of electromagnetically induced transparency

We demonstrate a fundamental limitation in the force enhancement in simple waveguide-resonator geometry. We also show that the all-optical analog to electromagnetically induced transparency, as observed in a waveguideresonator geometry, can be used to drastically enhance waveguide-resonator optical force, significantly beyond what one can achieve in principle in conventional waveguide-resonator coupling schemes. Pursuing an all-optical on-chip analog of electromagnetically induced transparency (EIT) In this paper, we consider a waveguide-resonator geometry consisting of two waveguides coupled through two ring resonators in between [ The use of an optical ring resonator to enhance optical force has been explored very extensively The origin of the optical force can be explained as the gradient of the energy landscape of the resonating photon energy and output power, with respect to relevant physical displacements Since we consider a two-dimensional (2D) system, the total force, as determined by a line integral of the stress tensor, is in units of N/m, and the power is in units of W/m. Since the force is proportional to the input power, we will present the force in the normalized unit of (N/m)/(W/m) = N/W. Also, we will make a comparison between the waveguide-cavity force and the force between parallel waveguides