Copper Mirrors

Copper mirrors on the left direct and focus microwave photons in electrons on liquid helium system. The flat mirror (on the right) has two concentric circular electrodes (aka a Corbino pair) that are used to measure electron conductivity.
Copper mirrors direct and focus microwave photons in electrons on liquid helium system. The focusing mirror (on the left) is made by pressing a hard stainless steel ball (also shown in the picture) into a soft piece of copper. The flat mirror (on the right) shows two concentric circular electrodes (aka a Corbino pair) that are used to measure electron conductivity.
Copyright OIST (Okinawa Institute of Science and Technology Graduate University, 沖縄科学技術大学院大学). Creative Commons Attribution 4.0 International License (CC BY 4.0).
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