IQUIST Seminar: Can-Ming Hu, University of Manitoba
- When:
- Tuesday, February 20, 2024 11:00 am - 11:50 am
- Where:
- 190 Engineering Sciences Building, 1101 W. Springfield Ave., Urbana, IL 61801 and Virtual
- Speaker:
- Can-Ming Hu, Distinguished Professor, University of Manitoba
- Title:
- Coherent microwave emission using cavity magnonics
- Description:
-
Cavity Magnonics is an emerging field studying the light-matter interactions involving cavity photons and magnons [1]. Via the quantum physics of spin-photon entanglement on the one hand, and classical electrodynamic coupling on the other, magnon-photon coupling connects some of the most exciting modern physics, such as quantum information and quantum optics, with one of the oldest science on the earth, the magnetism [2].
This talk reports our latest progress in this frontier. By developing a gain-embedded cavity magnonics platform [3], we create a gain-driven polariton (GDP) that is activated by an amplified electromagnetic field. Utilizing the gain-sustained photon coherence of the GDP, we demonstrate polariton-based coherent microwave amplification (~ 40 dB) and achieve high-quality coherent microwave emission (Q > 109), which exceed the performance of spin-torque oscillators and many state-of-the-art masers.