Cavity-mediated coupling of magnons in space-separated crystals

Seminarium wydziałowe

Dnia 2022.11.29 (wtorek) o godzinie 13.15, odbędzie się w sali 2011 Wydziału Fizyki seminarium na którym Dr Marcin Białek z Instytutu Wysokich Ciśnień PAN wygłosi wykład:

„Cavity-mediated coupling of magnons in space-separated crystals”

 

Serdecznie zapraszamy

Andrzej Maziewski

Jerzy Przeszowski

 

Marcin Białek
Institute of High Pressure Physics of the Polish Academy of Sciences

Cavity-mediated coupling of magnons in space-separated crystals

In the regime of strong light-matter coupling, polariton modes are formed that are hybrid light-matter excitations sharing properties of both, an electrodynamic cavity mode and a matter mode. Recently, magnon-polaritons are intensively researched in ferromagnetic materials in the microwave range, with potential applications for quantum computing and sensors. In the recent decade, polaritons were obtained in the THz range with various excitations like, intersubband plasmons, magnetoplasmons in two-dimensional electron gases or vibrational modes of molecules. However, exploring magnetic excitations instead of these dielectric transitions gives an advantage of low damping of magnons and their tunability with temperature and magnetic fields. We are investigating coupling of the antiferromagnetic resonance (AFMR) with THz cavity modes. Here, we report on cavity-mediated magnon-magnon coupling in a system consisting of two parallel-plane crystals forming a Fabry-Perot type cavity. We observed formation of hybridized modes of antiferromagnetic resonance in space-separated crystals hematite (alpha-Fe2O3).