研究目的
To investigate the strong coupling regime of an ensemble of two-dimensional electrons to a single-mode cavity resonator, focusing on the interaction between the cyclotron motion of electrons on the surface of liquid helium and the microwave field in a semiconfocal Fabry-Pérot resonator.
研究成果
The study demonstrates strong coupling between the cyclotron motion of a two-dimensional electron ensemble and the corotating polarization component of the electromagnetic mode in a Fabry-Pérot resonator. The observation of normal-mode splitting is well accounted for by classical electrodynamics, with agreement between classical and quantum treatments. An unexpected resonance with the counterrotating polarization component is explained by field mixing due to the cavity's conductive walls.
研究不足
The study is limited by the quality factor of the cavity resonator and the scattering rate of electrons, which affect the resolution of the normal-mode splitting and the observation of quantum electrodynamic features.
1：Experimental Design and Method Selection:
The experiment involves coupling the cyclotron motion of electrons on the surface of liquid helium to the microwave field in a semiconfocal Fabry-Pérot resonator. The setup includes a vacuum-tight copper cell with a semiconfocal Fabry-Pérot resonator, a static magnetic field for cyclotron resonance excitation, and microwave radiation for interaction.
2：Sample Selection and Data Sources:
A two-dimensional electron system (2DES) was created on the surface of superfluid 3He cooled to T = 0.2 K. The electrons were produced by thermal emission from a tungsten filament.
3：2 K. The electrons were produced by thermal emission from a tungsten filament.
List of Experimental Equipment and Materials:
3. List of Experimental Equipment and Materials: The setup includes a semiconfocal Fabry-Pérot resonator, a static magnetic field source, microwave radiation source, cryogenic InSb detector, and a dilution refrigerator.
4：Experimental Procedures and Operational Workflow:
The experiment involved measuring the microwave power reflected from the cavity and the dc conductivity response of electrons as functions of the cyclotron and microwave frequencies.
5：Data Analysis Methods:
The data were analyzed using classical electrodynamics and quantum mechanical models to understand the interaction between the electron ensemble and the cavity field.
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