Multimodality integrated microresonators using the Moiré speedup effect
Qing-Xin Ji, Peng Liu, Warren Jin, Joel Guo, Lue Wu, Zhiquan Yuan, Jonathan Peters, Avi Feshali, Mario Paniccia, John E. Bowers, Kerry J. Vahala
Abstract
microresonators are indispensable components of photonic integrated circuits and offer several useful operational modes. However, these modes cannot be reconfigured after fabrication because they are fixed by the resonator's physical geometry. In this work, we propose a Moiré speedup dispersion tuning method that enables a microresonator device to operate in any of three modes. Electrical tuning of Vernier coupled rings switches operating modality to Brillouin laser, bright microcomb, and dark microcomb operation on demand using the same hybrid-integrated device. Brillouin phase matching and microcomb operation across the telecom C-band is demonstrated. Likewise, by using a single-pump wavelength, the operating mode can be switched. As a result, one universal design can be applied across a range of applications. The device brings flexible mixed-mode operation to integrated photonic circuits.