Control of the coupling strength and linewidth of a cavity magnon-polariton
| Autor: | Christine Dörflinger, Tim Wolz, Romain Lebrun, Martin Weides, Rair Macêdo, Isabella Boventer, Mathias Kläui |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Physics
Coupling Condensed Matter - Mesoscale and Nanoscale Physics Condensed matter physics Magnon FOS: Physical sciences 02 engineering and technology Coherent information 021001 nanoscience & nanotechnology 01 natural sciences Resonator Laser linewidth Coherent control Mesoscale and Nanoscale Physics (cond-mat.mes-hall) 0103 physical sciences Polariton Quantum information 010306 general physics 0210 nano-technology |
| Zdroj: | Physical Review Research |
| ISSN: | 2643-1564 |
| DOI: | 10.1103/physrevresearch.2.013154 |
| Popis: | The full coherent control of hybridized systems such as strongly coupled cavity photon-magnon states is a crucial step to enable future information processing technologies. Thus, it is particularly interesting to engineer deliberate control mechanisms such as the full control of the coupling strength as a measure for coherent information exchange. In this work, we employ cavity resonator spectroscopy to demonstrate the complete control of the coupling strength of hybridized cavity photon-magnon states. For this, we use two driving microwave inputs which can be tuned at will. Here, only the first input couples directly to the cavity resonator photons, whilst the second tone exclusively acts as a direct input for the magnons. For these inputs, both the relative phase $\phi$ and amplitude $\delta_0$ can be independently controlled. We demonstrate that for specific quadratures between both tones, we can increase the coupling strength, close the anticrossing gap, and enter a regime of level merging. At the transition, the total amplitude is enhanced by a factor of 1000 and we observe an additional linewidth decrease of $13\%$ at resonance due to level merging. Such control of the coupling, and hence linewidth, open up an avenue to enable or suppress an exchange of information and bridging the gap between quantum information and spintronics applications. Comment: 9 pages, 6 figures |
| Databáze: | OpenAIRE |
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