On-chip broadband nonreciprocal light storage

Nanophotonics

article

Moritz Merklein¹  Birgit Stiller¹  Khu Vu³  Pan Ma⁴  Stephen J. Madden³  Benjamin J. Eggleton¹ 

[1] The University of Sydney Nano Institute (Sydney Nano), The University of Sydney;Institute of Photonics and Optical Science (IPOS), School of Physics, The University of Sydney;Max-Planck-Institute for the Science of Light;Laser Physics Centre, Research School of Physics and Engineering, Australian National University

关键词: Brillouin scattering;    integrated photonics;    nonreciprocity;    optical delay;   

DOI  :  10.1515/nanoph-2020-0371

学科分类：社会科学、人文和艺术（综合）

来源: De Gruyter

【 摘 要 】

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.

【 授权许可】

CC BY