Optical Isolation using Compact Time-modulated Cavity Array
Keywords:
cavity resonators, finite-difference time-domain method, isolators, time-varying circuitsAbstract
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.
Downloads
References
Y. Shoji, T. Mizumoto, H. Yokoi, I-W. Hsieh, and R. M. Osgood, “Magneto-optical isolator with silicon waveguide fabricated by direct bonding,” Applied Physics Letters, vol. 92, pp. 071117, 2008. [2] W. Suh, Z. Wang, and S. Fan, “Temporal coupled-mode theory and the presence of non-orthogonal modes in lossless multimode cavities,” IEEE Journal of Quantum Electronics, vol. 40, pp. 1511–1518, 2004.
A. Mock, D. Sounas, and A. Alu, “Magnet-Free Circulator Based on ` Spatiotemporal Modulation of Photonic Crystal Defect Cavities,” ACS Photonics, vol. 6, pp. 2056–2066, 2019.
A. Mock, D. Sounas, and A. Alu, “Tunable orbital angular momen- ` tum radiation from angular-momentum-biased microcavities,” Physical Review Letters, vol. 121, pp. 103901, 2018.
A. Zain, N. Johnson, M. Sorel, and R. De La Rue, “Ultra high quality factor one dimensional photonic crystal/photonic wire micro-cavities in silicon-on-insulator (SOI),” Optics Express, vol. 16, pp. 12084, 2008.
A. Mock, “Calculating Scattering Spectra using Time-domain Modeling of Time-modulated Systems,” submitted to 2020 International Applied Computational Electromagnetics (ACES) Symposium, Monterey, CA, USA, March 2020, paper 1140.
