In this paper, a resonant system is demonstrated on silicon-on-insulator wafer to achieve tunable Fano resonances. In this system, the Fano resonance originates from the interference of two beams resonant in the microring resonator. The shapes of the Fano resonances are tunable through controlling the phase difference of the two beams. Both large slope and high extinctionratio (ER) are obtained when the phase difference is 0.5π or 1.5π. Experimental results show that Fano resonances with steep slope and ER over 20 dB are achieved in the whole free spectral range by controlling the microheaters to meet the phase condition.
Electromagnetic wave interference; Elemental semiconductors; Micro-optics; Microcavities; Micromechanical resonators; Photoemission; Silicon
Controls and Control Theory | Electrical and Computer Engineering | Electrical and Electronics | Electromagnetics and Photonics | Power and Energy | Signal Processing | Systems and Communications
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Tunable Fano resonances based on two-beam interference in microring resonator.
Applied physics Letters, 120
Controls and Control Theory Commons, Electrical and Electronics Commons, Electromagnetics and Photonics Commons, Power and Energy Commons, Signal Processing Commons, Systems and Communications Commons