On-chip broadband nonreciprocal light storage

Merklein M, Stiller B, Vu K, Ma P, Madden SJ, Eggleton BJ (2021)

Publication Type: Journal article

Publication year: 2021


Book Volume: 10

Pages Range: 75-82

Journal Issue: 1

DOI: 10.1515/nanoph-2020-0371


Breaking the symmetry between forward- and backward-propagating optical modes is of fundamental scientific interest and enables crucial functionalities, such as isolators, circulators, and duplex communication systems. Although there has been progress in achieving optical isolation on-chip, integrated broadband nonreciprocal signal processing functionalities that enable transmitting and receiving via the same low-loss planar waveguide, without altering the frequency or mode of the signal, remain elusive. Here, we demonstrate a nonreciprocal delay scheme based on the unidirectional transfer of optical data pulses to acoustic waves in a chip-based integration platform. We experimentally demonstrate that this scheme is not impacted by simultaneously counterpropagating optical signals. Furthermore, we achieve a bandwidth more than an order of magnitude broader than the intrinsic optoacoustic linewidth, linear operation for a wide range of signal powers, and importantly, show that this scheme is wavelength preserving and avoids complicated multimode structures.

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Merklein, M., Stiller, B., Vu, K., Ma, P., Madden, S.J., & Eggleton, B.J. (2021). On-chip broadband nonreciprocal light storage. Nanophotonics, 10(1), 75-82. https://doi.org/10.1515/nanoph-2020-0371


Merklein, Moritz, et al. "On-chip broadband nonreciprocal light storage." Nanophotonics 10.1 (2021): 75-82.

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