Extended Data Figure 4: Infrared shielding.
From: Coherent suppression of electromagnetic dissipation due to superconducting quasiparticles
a, Top plate of the infrared shield and the attached samples connected by microwave coaxial lines. The hermetic seal is on the top side of the plate. The top half of the cryoperm shield is also visible. b, Inside of the infrared shield can. An infrared absorbent coating was applied to a thin copper sheet and placed on the walls and bottom of the can. c, Closed infrared shield, completely enclosing the experimental area.
