Nonreciprocal strong coupling between magnons and microwave photons are obtained for the first time, enabling asymmetric signal routing in a significantly broadened frequency range.
Significance and Impact
The findings establish a promising direction for an emergent class of nonreciprocal devices for coherent/quantum information processing, which are essential for increasing communication channel capacity and suppressing undesired interferences.
- Chirality is introduced to microwave photons in a specially engineered integrated cavity, enabling direction-dependent strong coupling with magnon excitations.
- The magneto-electro-optical spectrometer at the Center for Nanoscale Materials (CNM) was used.
Work was performed in part at CNM.
About Argonne’s Center for Nanoscale Materials
The Center for Nanoscale Materials is one of the five DOE Nanoscale Science Research Centers, premier national user facilities for interdisciplinary research at the nanoscale supported by the DOE Office of Science. Together the NSRCs comprise a suite of complementary facilities that provide researchers with state-of-the-art capabilities to fabricate, process, characterize and model nanoscale materials, and constitute the largest infrastructure investment of the National Nanotechnology Initiative. The NSRCs are located at DOE’s Argonne, Brookhaven, Lawrence Berkeley, Oak Ridge, Sandia and Los Alamos National Laboratories. For more information about the DOE NSRCs, please visit https://science.osti.gov/User-Facilities/User-Facilities-at-a-Glance.
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