Optical Isolation using Compact Time-modulated Cavity Array
Keywords:cavity resonators, finite-difference time-domain method, isolators, time-varying circuits
It is shown using coupled mode theory and verified using finite-difference time-domain simulations how a timemodulated three-cavity array can be designed to allow transmission from port 1 to port 2 but to prevent transmission from port 2 to port 1 thereby implementing optical isolation. The reciprocity of the system is broken by phase-shifting the modulation signal applied to each cavity by 120 degrees which gives the system a synthetic linear momentum.
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