Table 1. Main parameters of the measured samples.
Columns show the waveguide lengths, normal-metal resistances Ri, i є {A, B}, normal-metal materials, and normal-metal volumes (length×width×thickness). Based on the resistance values and equation (1), the right-most column provides the estimated ratio of the realized photonic thermal conductance and the quantum of thermal conductance at temperatures of approximately 150 mK.
| Sample | Length (m) | Ri (Ω) | Material | Volume (nm3) | GΓ/GQ |
|---|---|---|---|---|---|
| A1 | 0.2 | 65 | Cu | 5000 × 300 × 20 | 98 % |
| A2 | 1.0 | 75 | AuPd | 3200 × 300 × 40 | 94 % |
| A3 | 0.2 | 150 | AuPd | 3200 × 300 × 20 | 60 % |
| Control | 0.2 | 100 | AuPd | 3200 × 300 × 20 | 0 % |