1. Intermodal strong coupling and wideband, low-loss isolation in silicon
- Author
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Zhou, Yishu, Ruesink, Freek, Gertler, Shai, Cheng, Haotian, Pavlovich, Margaret, Kittlaus, Eric, Starbuck, Andrew L., Leenheer, Andrew J., Pomerene, Andrew T., Trotter, Douglas C., Dallo, Christina, Musick, Katherine M., Garcia, Eduardo, Reyna, Robert, Holterhoff, Andrew L., Gehl, Michael, Kodigala, Ashok, Eichenfield, Matt, Otterstrom, Nils T., Lentine, Anthony L., and Rakich, Peter more...
- Subjects
Physics - Optics - Abstract
Strong coupling enables a diverse set of applications that include optical memories, non-magnetic isolators, photonic state manipulation, and signal processing. To date, strong coupling in integrated platforms has been realized using narrow-linewidth high-Q optical resonators. In contrast, here we demonstrate wideband strong coupling between two photonic bands. The indirect interband photonic transition is controlled by electrically driving phonons in a linear silicon waveguide. Under large acoustic drive, the system features a Rabi-like energy exchange between two waveguide modes, demonstrating strong coupling. When tuned to unity energy conversion, our system unlocks a set of powerful applications, including optical modulators, routers and filters. In particular, we demonstrate a low loss (-2.08 dB) acousto-optic modulator (AOM) with pump suppression ratio > 55 dB. We also reconfigure our system to demonstrate a non-magnetic, low-loss (< 1 dB) and broadband (59 GHz 10 dB isolation bandwidth) optical isolator. more...
- Published
- 2022