On-chip broadband nonreciprocal light storage
Abstract
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.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Oct 02, 2020
- Source ID
- 10.1515/nanoph-2020-0371
Entities
People
- Ben Eggleton
- Birgit Stiller
- Khu Vu
- Moritz Merklein
- Pan Ma
- Stephen J. Madden
Organizations
- Australian National University
- Australian Research Council
- Cancer Genomics Centre
- Max Planck Institute for the Science of Light
- Office of Naval Research
- University of Sydney